Motivation and implementation:
==============================
Currently, many architecutres have't taken the standard GENERIC_IOREMAP
way to implement ioremap_prot(), iounmap(), and ioremap_xx(), but make
these functions specifically under each arch's folder. Those cause many
duplicated codes of ioremap() and iounmap().
In this patchset, firstly introduce generic_ioremap_prot() and
generic_iounmap() to extract the generic codes for GENERIC_IOREMAP.
By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(),
generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap()
and iounmap() are all visible and available to arch. Arch needs to
provide wrapper functions to override the generic version if there's
arch specific handling in its corresponding ioremap_prot(), ioremap()
or iounmap(). With these changes, duplicated ioremap/iounmap() code uder
ARCH-es are removed, and the equivalent functioality is kept as before.
Background info:
================
1)
The converting more architectures to take GENERIC_IOREMAP way is
suggested by Christoph in below discussion:
https://lore.kernel.org/all/[email protected]/T/#u
2)
In the previous v1 to v3, it's basically further action after arm64
has converted to GENERIC_IOREMAP way in below patchset. It's done by
adding hook ioremap_allowed() and iounmap_allowed() in ARCH to add
ARCH specific handling the middle of ioremap_prot() and iounmap().
[PATCH v5 0/6] arm64: Cleanup ioremap() and support ioremap_prot()
https://lore.kernel.org/all/[email protected]/T/#u
Later, during v3 reviewing, Christophe Leroy suggested to introduce
generic_ioremap_prot() and generic_iounmap() to generic codes, and ARCH
can provide wrapper function ioremap_prot(), ioremap() or iounmap() if
needed. Christophe made a RFC patchset as below to specially demonstrate
his idea. This is what v4 and now v5 is doing.
[RFC PATCH 0/8] mm: ioremap: Convert architectures to take GENERIC_IOREMAP way
https://lore.kernel.org/all/[email protected]/T/#u
Testing:
========
In v6, building and testing passed on arm64 and ppc64le, and only took
cross compiling on xtensa and passed.
------Old v5 testing
Old v4 has done below test. In v5, patch 1 is newly added to remove
ARCH_HAS_IOREMAP_xx, and patch 13 ("parisc: mm: Convert to GENERIC_IOREMAP")
is impacted, so I only built related x86_64, m68K, mips64, ppc64le, parisc and
all passed.
------Old v4 testing
- It's running well on arm64, s390x, ppc64le with this patchset applied
on the latest upstream kernel 6.2-rc8+.
- Cross compiling passed on arc, ia64, parisc, sh, xtensa.
- cross compiling is not tried on hexagon, openrisc and powerpc 32bit
because:
- Didn't find cross compiling tools for hexagon, ppc 32bit;
- there's error with openrisc compiling, while I have no idea how to
fix it. Please see below pasted log:
---------------------------------------------------------------------
[root@intel-knightslanding-lb-02 linux]# make ARCH=openrisc defconfig
*** Default configuration is based on 'or1ksim_defconfig'
#
# configuration written to .config
#
[root@intel-knightslanding-lb-02 linux]# make ARCH=openrisc -j320 CROSS_COMPILE=/usr/bin/openrisc-linux-gnu-
SYNC include/config/auto.conf.cmd
CC scripts/mod/empty.o
./scripts/check-local-export: /usr/bin/openrisc-linux-gnu-nm failed
make[1]: *** [scripts/Makefile.build:250: scripts/mod/empty.o] Error 1
make[1]: *** Deleting file 'scripts/mod/empty.o'
make: *** [Makefile:1275: prepare0] Error 2
----------------------------------------------------------------------
History:
=======
v5->v6:
- Remove stale descriptions in log - Mike
- Remove the early unmapping handling from fixmap pool in iounmap() in
openrisc; Based on that, iounmap() in openrisc ARCH can be removed - Mike
- Add WARN_ON_ONCE to aid debugging in generic_ioremap_prot() - Christoph
- Split the inclusion of include/asm-generic/io.h and redefining of the
helpers from the old patch 11 into a prep patch; The following patch
can only contain code converting to GENERIC_IOREMAP for SuperH - Christoph
- Add header file linux/ioremap.h and move is_ioremap_addr() over
there - Christoph
v4->v5:
- Ard and Christophe suggested adding a preparation patch to remove
ARCH_HAS_IOREMAP_xx macros, this is done in newly added patch 1.
- In the current patch 13 ("parisc: mm: Convert to GENERIC_IOREMAP"),
so we don't need to add ARCH_HAS_IOREMAP_WC.
v3->v4:
- Change to contain arch specific handling in wrapper function
ioremap(), ioremap_prot() or iounmap() to replace the old hook
ioremap|iounmap_allowed() hook way for each arch.
- Add two patches to convert powerpc to GENERIC_IOREMAP. They are
picked from above Christophe's RFC patchset, I made some changes
to make them formal.
v2->v3:
- Rewrite log of all patches to add more details as Christoph suggested.
- Merge the old patch 1 and 2 which adjusts return values and
parameters of arch_ioremap() into one patch, namely the current
patch 3. Christoph suggested this.
- Change the return value of arch_iounmap() to bool type since we only
do arch specific address filtering or address checking, bool value
can reflect the checking better. This is pointed out by Niklas when
he reviewed the s390 patch.
- Put hexagon patch at the beginning of patchset since hexagon has the
same ioremap() and iounmap() as standard ones, no arch_ioremap() and
arch_iounmap() hooks need be introduced. So the later arch_ioremap
and arch_iounmap() adjustment are not related in hexagon. Christophe
suggested this.
- Remove the early ioremap code from openrisc ioremap() firstly since
openrisc doesn't have early ioremap handling in openrisc arch code.
This simplifies the later converting to GENERIC_IOREMAP method.
Christoph and Stafford suggersted this.
- Fix compiling erorrs reported by lkp in parisc and sh patches.
Adding macro defintions for those port|mem io functions in
<asm/io.h> to avoid repeated definition in <asm-generic/io.h>.
v1->v2:
- Rename io[re|un]map_allowed() to arch_io[re|un]map() and made
some minor changes in patch 1~2 as per Alexander and Kefeng's
suggestions. Accordingly, adjust patches~4~11 because of the renaming
arch_io[re|un]map().
Baoquan He (16):
asm-generic/iomap.h: remove ARCH_HAS_IOREMAP_xx macros
hexagon: mm: Convert to GENERIC_IOREMAP
openrisc: mm: remove unneeded early ioremap code
mm: ioremap: allow ARCH to have its own ioremap method definition
mm/ioremap: add slab availability checking in ioremap_prot
arc: mm: Convert to GENERIC_IOREMAP
ia64: mm: Convert to GENERIC_IOREMAP
openrisc: mm: Convert to GENERIC_IOREMAP
s390: mm: Convert to GENERIC_IOREMAP
sh: add <asm-generic/io.h> including
sh: mm: Convert to GENERIC_IOREMAP
xtensa: mm: Convert to GENERIC_IOREMAP
parisc: mm: Convert to GENERIC_IOREMAP
mm: move is_ioremap_addr() into new header file
arm64 : mm: add wrapper function ioremap_prot()
mm: ioremap: remove unneeded ioremap_allowed and iounmap_allowed
Christophe Leroy (3):
mm/ioremap: Define generic_ioremap_prot() and generic_iounmap()
mm/ioremap: Consider IOREMAP space in generic ioremap
powerpc: mm: Convert to GENERIC_IOREMAP
arch/arc/Kconfig | 1 +
arch/arc/include/asm/io.h | 7 ++-
arch/arc/mm/ioremap.c | 49 ++---------------
arch/arm64/include/asm/io.h | 3 +-
arch/arm64/mm/ioremap.c | 10 ++--
arch/hexagon/Kconfig | 1 +
arch/hexagon/include/asm/io.h | 9 +++-
arch/hexagon/mm/ioremap.c | 44 ----------------
arch/ia64/Kconfig | 1 +
arch/ia64/include/asm/io.h | 13 ++---
arch/ia64/mm/ioremap.c | 41 +++------------
arch/loongarch/include/asm/io.h | 2 -
arch/m68k/include/asm/io_mm.h | 2 -
arch/m68k/include/asm/kmap.h | 2 -
arch/mips/include/asm/io.h | 5 +-
arch/openrisc/Kconfig | 1 +
arch/openrisc/include/asm/io.h | 11 ++--
arch/openrisc/mm/ioremap.c | 82 -----------------------------
arch/parisc/Kconfig | 1 +
arch/parisc/include/asm/io.h | 15 ++++--
arch/parisc/mm/ioremap.c | 62 ++--------------------
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/io.h | 17 ++----
arch/powerpc/include/asm/pgtable.h | 8 ---
arch/powerpc/mm/ioremap.c | 26 +--------
arch/powerpc/mm/ioremap_32.c | 19 ++++---
arch/powerpc/mm/ioremap_64.c | 12 +----
arch/s390/Kconfig | 1 +
arch/s390/include/asm/io.h | 21 ++++----
arch/s390/pci/pci.c | 57 ++++----------------
arch/sh/Kconfig | 1 +
arch/sh/include/asm/io.h | 65 ++++++++++++-----------
arch/sh/include/asm/io_noioport.h | 7 +++
arch/sh/mm/ioremap.c | 65 ++++-------------------
arch/x86/include/asm/io.h | 5 --
arch/xtensa/Kconfig | 1 +
arch/xtensa/include/asm/io.h | 32 +++++------
arch/xtensa/mm/ioremap.c | 58 +++++---------------
drivers/net/ethernet/sfc/io.h | 2 +-
drivers/net/ethernet/sfc/siena/io.h | 2 +-
include/asm-generic/io.h | 31 +++--------
include/asm-generic/iomap.h | 6 +--
include/linux/ioremap.h | 30 +++++++++++
include/linux/mm.h | 5 --
kernel/iomem.c | 1 +
mm/ioremap.c | 41 ++++++++++-----
46 files changed, 247 insertions(+), 629 deletions(-)
delete mode 100644 arch/hexagon/mm/ioremap.c
create mode 100644 include/linux/ioremap.h
--
2.34.1
By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(),
generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap()
and iounmap() are all visible and available to arch. Arch needs to
provide wrapper functions to override the generic versions if there's
arch specific handling in its ioremap_prot(), ioremap() or iounmap().
This change will simplify implementation by removing duplicated codes
with generic_ioremap_prot() and generic_iounmap(), and has the equivalent
functioality as before.
Here, add wrapper function ioremap_prot() for parisc's special operation
when iounmap().
Signed-off-by: Baoquan He <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Cc: "James E.J. Bottomley" <[email protected]>
Cc: Helge Deller <[email protected]>
Cc: [email protected]
---
v5->v6:
Remove the stale paragraph related to ARCH_HAS_IOREMAP_WC adding in
log - Mike
arch/parisc/Kconfig | 1 +
arch/parisc/include/asm/io.h | 15 ++++++---
arch/parisc/mm/ioremap.c | 62 +++---------------------------------
3 files changed, 15 insertions(+), 63 deletions(-)
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 967bde65dd0e..315cc42b1a2c 100644
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -36,6 +36,7 @@ config PARISC
select GENERIC_ATOMIC64 if !64BIT
select GENERIC_IRQ_PROBE
select GENERIC_PCI_IOMAP
+ select GENERIC_IOREMAP
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select GENERIC_SMP_IDLE_THREAD
select GENERIC_ARCH_TOPOLOGY if SMP
diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h
index c05e781be2f5..366537042465 100644
--- a/arch/parisc/include/asm/io.h
+++ b/arch/parisc/include/asm/io.h
@@ -125,12 +125,17 @@ static inline void gsc_writeq(unsigned long long val, unsigned long addr)
/*
* The standard PCI ioremap interfaces
*/
-void __iomem *ioremap(unsigned long offset, unsigned long size);
-#define ioremap_wc ioremap
-#define ioremap_uc ioremap
-#define pci_iounmap pci_iounmap
+#define ioremap_prot ioremap_prot
+
+#define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \
+ _PAGE_ACCESSED | _PAGE_NO_CACHE)
-extern void iounmap(const volatile void __iomem *addr);
+#define ioremap_wc(addr, size) \
+ ioremap_prot((addr), (size), _PAGE_IOREMAP)
+#define ioremap_uc(addr, size) \
+ ioremap_prot((addr), (size), _PAGE_IOREMAP)
+
+#define pci_iounmap pci_iounmap
void memset_io(volatile void __iomem *addr, unsigned char val, int count);
void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
diff --git a/arch/parisc/mm/ioremap.c b/arch/parisc/mm/ioremap.c
index 345ff0b66499..fd996472dfe7 100644
--- a/arch/parisc/mm/ioremap.c
+++ b/arch/parisc/mm/ioremap.c
@@ -13,25 +13,9 @@
#include <linux/io.h>
#include <linux/mm.h>
-/*
- * Generic mapping function (not visible outside):
- */
-
-/*
- * Remap an arbitrary physical address space into the kernel virtual
- * address space.
- *
- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
- * have to convert them into an offset in a page-aligned mapping, but the
- * caller shouldn't need to know that small detail.
- */
-void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
+ unsigned long prot)
{
- void __iomem *addr;
- struct vm_struct *area;
- unsigned long offset, last_addr;
- pgprot_t pgprot;
-
#ifdef CONFIG_EISA
unsigned long end = phys_addr + size - 1;
/* Support EISA addresses */
@@ -40,11 +24,6 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
phys_addr |= F_EXTEND(0xfc000000);
#endif
- /* Don't allow wraparound or zero size */
- last_addr = phys_addr + size - 1;
- if (!size || last_addr < phys_addr)
- return NULL;
-
/*
* Don't allow anybody to remap normal RAM that we're using..
*/
@@ -62,39 +41,6 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
}
}
- pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY |
- _PAGE_ACCESSED | _PAGE_NO_CACHE);
-
- /*
- * Mappings have to be page-aligned
- */
- offset = phys_addr & ~PAGE_MASK;
- phys_addr &= PAGE_MASK;
- size = PAGE_ALIGN(last_addr + 1) - phys_addr;
-
- /*
- * Ok, go for it..
- */
- area = get_vm_area(size, VM_IOREMAP);
- if (!area)
- return NULL;
-
- addr = (void __iomem *) area->addr;
- if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
- phys_addr, pgprot)) {
- vunmap(addr);
- return NULL;
- }
-
- return (void __iomem *) (offset + (char __iomem *)addr);
-}
-EXPORT_SYMBOL(ioremap);
-
-void iounmap(const volatile void __iomem *io_addr)
-{
- unsigned long addr = (unsigned long)io_addr & PAGE_MASK;
-
- if (is_vmalloc_addr((void *)addr))
- vunmap((void *)addr);
+ return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
}
-EXPORT_SYMBOL(iounmap);
+EXPORT_SYMBOL(ioremap_prot);
--
2.34.1
Since hook functions ioremap_allowed() and iounmap_allowed() will be
obsoleted, add wrapper function ioremap_prot() to contain the
specific handling in addition to generic_ioremap_prot() invocation.
Signed-off-by: Baoquan He <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Kefeng Wang <[email protected]>
Reviewed-by: Mike Rapoport (IBM) <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
---
arch/arm64/include/asm/io.h | 3 +--
arch/arm64/mm/ioremap.c | 10 ++++++----
2 files changed, 7 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/include/asm/io.h b/arch/arm64/include/asm/io.h
index 877495a0fd0c..97dd4ff1253b 100644
--- a/arch/arm64/include/asm/io.h
+++ b/arch/arm64/include/asm/io.h
@@ -139,8 +139,7 @@ extern void __memset_io(volatile void __iomem *, int, size_t);
* I/O memory mapping functions.
*/
-bool ioremap_allowed(phys_addr_t phys_addr, size_t size, unsigned long prot);
-#define ioremap_allowed ioremap_allowed
+#define ioremap_prot ioremap_prot
#define _PAGE_IOREMAP PROT_DEVICE_nGnRE
diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c
index c5af103d4ad4..269f2f63ab7d 100644
--- a/arch/arm64/mm/ioremap.c
+++ b/arch/arm64/mm/ioremap.c
@@ -3,20 +3,22 @@
#include <linux/mm.h>
#include <linux/io.h>
-bool ioremap_allowed(phys_addr_t phys_addr, size_t size, unsigned long prot)
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
+ unsigned long prot)
{
unsigned long last_addr = phys_addr + size - 1;
/* Don't allow outside PHYS_MASK */
if (last_addr & ~PHYS_MASK)
- return false;
+ return NULL;
/* Don't allow RAM to be mapped. */
if (WARN_ON(pfn_is_map_memory(__phys_to_pfn(phys_addr))))
- return false;
+ return NULL;
- return true;
+ return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
}
+EXPORT_SYMBOL(ioremap_prot);
/*
* Must be called after early_fixmap_init
--
2.34.1
Architectures can be converted to GENERIC_IOREMAP, to take standard
ioremap_xxx() and iounmap() way. But some ARCH-es could have specific
handling for ioremap_prot(), ioremap() and iounmap(), than standard
methods.
In oder to convert these ARCH-es to take GENERIC_IOREMAP method, allow
these architecutres to have their own ioremap_prot(), ioremap() and
iounmap() definitions.
Signed-off-by: Baoquan He <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Kefeng Wang <[email protected]>
Reviewed-by: Mike Rapoport (IBM) <[email protected]>
Cc: [email protected]
---
include/asm-generic/io.h | 3 +++
mm/ioremap.c | 4 ++++
2 files changed, 7 insertions(+)
diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
index a7ca2099ba19..39244c3ee797 100644
--- a/include/asm-generic/io.h
+++ b/include/asm-generic/io.h
@@ -1081,11 +1081,14 @@ void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
void iounmap(volatile void __iomem *addr);
void generic_iounmap(volatile void __iomem *addr);
+#ifndef ioremap
+#define ioremap ioremap
static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
{
/* _PAGE_IOREMAP needs to be supplied by the architecture */
return ioremap_prot(addr, size, _PAGE_IOREMAP);
}
+#endif
#endif /* !CONFIG_MMU || CONFIG_GENERIC_IOREMAP */
#ifndef ioremap_wc
diff --git a/mm/ioremap.c b/mm/ioremap.c
index db6234b9db59..9f34a8f90b58 100644
--- a/mm/ioremap.c
+++ b/mm/ioremap.c
@@ -46,12 +46,14 @@ void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
return (void __iomem *)(vaddr + offset);
}
+#ifndef ioremap_prot
void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
unsigned long prot)
{
return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
}
EXPORT_SYMBOL(ioremap_prot);
+#endif
void generic_iounmap(volatile void __iomem *addr)
{
@@ -64,8 +66,10 @@ void generic_iounmap(volatile void __iomem *addr)
vunmap(vaddr);
}
+#ifndef iounmap
void iounmap(volatile void __iomem *addr)
{
generic_iounmap(addr);
}
EXPORT_SYMBOL(iounmap);
+#endif
--
2.34.1
By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(),
generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap()
and iounmap() are all visible and available to arch. Arch needs to
provide wrapper functions to override the generic versions if there's
arch specific handling in its ioremap_prot(), ioremap() or iounmap().
This change will simplify implementation by removing duplicated codes
with generic_ioremap_prot() and generic_iounmap(), and has the equivalent
functioality as before.
For openrisc, the current ioremap() and iounmap() are the same as
generic version. After taking GENERIC_IOREMAP way, the old ioremap()
and iounmap() can be completely removed.
Signed-off-by: Baoquan He <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: Stefan Kristiansson <[email protected]>
Cc: [email protected]
---
v5->v6:
Remove iounmap() because it's the same as the generic version since we
have removed the code handling ealry mapping from fixmap pool in
patch 3 - Mike
arch/openrisc/Kconfig | 1 +
arch/openrisc/include/asm/io.h | 11 ++++----
arch/openrisc/mm/ioremap.c | 49 ----------------------------------
3 files changed, 7 insertions(+), 54 deletions(-)
diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
index c7f282f60f64..fd9bb76a610b 100644
--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -21,6 +21,7 @@ config OPENRISC
select GENERIC_IRQ_PROBE
select GENERIC_IRQ_SHOW
select GENERIC_PCI_IOMAP
+ select GENERIC_IOREMAP
select GENERIC_CPU_DEVICES
select HAVE_PCI
select HAVE_UID16
diff --git a/arch/openrisc/include/asm/io.h b/arch/openrisc/include/asm/io.h
index ee6043a03173..5a6f0f16a5ce 100644
--- a/arch/openrisc/include/asm/io.h
+++ b/arch/openrisc/include/asm/io.h
@@ -15,6 +15,8 @@
#define __ASM_OPENRISC_IO_H
#include <linux/types.h>
+#include <asm/pgalloc.h>
+#include <asm/pgtable.h>
/*
* PCI: We do not use IO ports in OpenRISC
@@ -27,11 +29,10 @@
#define PIO_OFFSET 0
#define PIO_MASK 0
-#define ioremap ioremap
-void __iomem *ioremap(phys_addr_t offset, unsigned long size);
-
-#define iounmap iounmap
-extern void iounmap(volatile void __iomem *addr);
+/*
+ * I/O memory mapping functions.
+ */
+#define _PAGE_IOREMAP (pgprot_val(PAGE_KERNEL) | _PAGE_CI)
#include <asm-generic/io.h>
diff --git a/arch/openrisc/mm/ioremap.c b/arch/openrisc/mm/ioremap.c
index cdbcc7e73684..91c8259d4b7e 100644
--- a/arch/openrisc/mm/ioremap.c
+++ b/arch/openrisc/mm/ioremap.c
@@ -22,55 +22,6 @@
extern int mem_init_done;
-/*
- * Remap an arbitrary physical address space into the kernel virtual
- * address space. Needed when the kernel wants to access high addresses
- * directly.
- *
- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
- * have to convert them into an offset in a page-aligned mapping, but the
- * caller shouldn't need to know that small detail.
- */
-void __iomem *__ref ioremap(phys_addr_t addr, unsigned long size)
-{
- phys_addr_t p;
- unsigned long v;
- unsigned long offset, last_addr;
- struct vm_struct *area = NULL;
-
- /* Don't allow wraparound or zero size */
- last_addr = addr + size - 1;
- if (!size || last_addr < addr)
- return NULL;
-
- /*
- * Mappings have to be page-aligned
- */
- offset = addr & ~PAGE_MASK;
- p = addr & PAGE_MASK;
- size = PAGE_ALIGN(last_addr + 1) - p;
-
- area = get_vm_area(size, VM_IOREMAP);
- if (!area)
- return NULL;
- v = (unsigned long)area->addr;
-
- if (ioremap_page_range(v, v + size, p,
- __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_CI))) {
- vfree(area->addr);
- return NULL;
- }
-
- return (void __iomem *)(offset + (char *)v);
-}
-EXPORT_SYMBOL(ioremap);
-
-void iounmap(volatile void __iomem *addr)
-{
- return vfree((void *)(PAGE_MASK & (unsigned long)addr));
-}
-EXPORT_SYMBOL(iounmap);
-
/**
* OK, this one's a bit tricky... ioremap can get called before memory is
* initialized (early serial console does this) and will want to alloc a page
--
2.34.1
Now is_ioremap_addr() is only used in kernel/iomem.c and gonna be used
in mm/ioremap.c. Move it into its own new header file linux/ioremap.h.
Suggested-by: Christoph Hellwig <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Signed-off-by: Baoquan He <[email protected]>
---
v6:
Newly added - Christoph
arch/powerpc/include/asm/pgtable.h | 8 --------
include/linux/ioremap.h | 30 ++++++++++++++++++++++++++++++
include/linux/mm.h | 5 -----
kernel/iomem.c | 1 +
mm/ioremap.c | 10 +---------
5 files changed, 32 insertions(+), 22 deletions(-)
create mode 100644 include/linux/ioremap.h
diff --git a/arch/powerpc/include/asm/pgtable.h b/arch/powerpc/include/asm/pgtable.h
index 9972626ddaf6..d252323a753f 100644
--- a/arch/powerpc/include/asm/pgtable.h
+++ b/arch/powerpc/include/asm/pgtable.h
@@ -158,14 +158,6 @@ static inline pgtable_t pmd_pgtable(pmd_t pmd)
}
#ifdef CONFIG_PPC64
-#define is_ioremap_addr is_ioremap_addr
-static inline bool is_ioremap_addr(const void *x)
-{
- unsigned long addr = (unsigned long)x;
-
- return addr >= IOREMAP_BASE && addr < IOREMAP_END;
-}
-
struct seq_file;
void arch_report_meminfo(struct seq_file *m);
#endif /* CONFIG_PPC64 */
diff --git a/include/linux/ioremap.h b/include/linux/ioremap.h
new file mode 100644
index 000000000000..f0e99fc7dd8b
--- /dev/null
+++ b/include/linux/ioremap.h
@@ -0,0 +1,30 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_IOREMAP_H
+#define _LINUX_IOREMAP_H
+
+#include <linux/kasan.h>
+#include <asm/pgtable.h>
+
+#if defined(CONFIG_HAS_IOMEM) || defined(CONFIG_GENERIC_IOREMAP)
+/*
+ * Ioremap often, but not always uses the generic vmalloc area. E.g on
+ * Power ARCH, it could have different ioremap space.
+ */
+#ifndef IOREMAP_START
+#define IOREMAP_START VMALLOC_START
+#define IOREMAP_END VMALLOC_END
+#endif
+static inline bool is_ioremap_addr(const void *x)
+{
+ unsigned long addr = (unsigned long)kasan_reset_tag(x);
+
+ return addr >= IOREMAP_START && addr < IOREMAP_END;
+}
+#else
+static inline bool is_ioremap_addr(const void *x)
+{
+ return false;
+}
+#endif
+
+#endif /* _LINUX_IOREMAP_H */
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 27ce77080c79..7379f19768b4 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1041,11 +1041,6 @@ unsigned long vmalloc_to_pfn(const void *addr);
* On nommu, vmalloc/vfree wrap through kmalloc/kfree directly, so there
* is no special casing required.
*/
-
-#ifndef is_ioremap_addr
-#define is_ioremap_addr(x) is_vmalloc_addr(x)
-#endif
-
#ifdef CONFIG_MMU
extern bool is_vmalloc_addr(const void *x);
extern int is_vmalloc_or_module_addr(const void *x);
diff --git a/kernel/iomem.c b/kernel/iomem.c
index 62c92e43aa0d..9682471e6471 100644
--- a/kernel/iomem.c
+++ b/kernel/iomem.c
@@ -3,6 +3,7 @@
#include <linux/types.h>
#include <linux/io.h>
#include <linux/mm.h>
+#include <linux/ioremap.h>
#ifndef ioremap_cache
/* temporary while we convert existing ioremap_cache users to memremap */
diff --git a/mm/ioremap.c b/mm/ioremap.c
index 68d9895144ad..a21a6c9fa5ab 100644
--- a/mm/ioremap.c
+++ b/mm/ioremap.c
@@ -10,15 +10,7 @@
#include <linux/mm.h>
#include <linux/io.h>
#include <linux/export.h>
-
-/*
- * Ioremap often, but not always uses the generic vmalloc area. E.g on
- * Power ARCH, it could have different ioremap space.
- */
-#ifndef IOREMAP_START
-#define IOREMAP_START VMALLOC_START
-#define IOREMAP_END VMALLOC_END
-#endif
+#include <linux/ioremap.h>
void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
pgprot_t prot)
--
2.34.1
From: Christophe Leroy <[email protected]>
Architectures like powerpc have a dedicated space for IOREMAP mappings.
If so, use it in generic_ioremap_prot().
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Baoquan He <[email protected]>
---
v5->v6:
Add definition of IOREMAP_START|END in mm/ioremap.c so that
we can call __get_vm_area_caller() for all ARCH-es - Christoph
mm/ioremap.c | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/mm/ioremap.c b/mm/ioremap.c
index 86b82ec27d2b..68d9895144ad 100644
--- a/mm/ioremap.c
+++ b/mm/ioremap.c
@@ -11,6 +11,15 @@
#include <linux/io.h>
#include <linux/export.h>
+/*
+ * Ioremap often, but not always uses the generic vmalloc area. E.g on
+ * Power ARCH, it could have different ioremap space.
+ */
+#ifndef IOREMAP_START
+#define IOREMAP_START VMALLOC_START
+#define IOREMAP_END VMALLOC_END
+#endif
+
void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
pgprot_t prot)
{
@@ -35,8 +44,8 @@ void __iomem *generic_ioremap_prot(phys_addr_t phys_addr, size_t size,
if (!ioremap_allowed(phys_addr, size, pgprot_val(prot)))
return NULL;
- area = get_vm_area_caller(size, VM_IOREMAP,
- __builtin_return_address(0));
+ area = __get_vm_area_caller(size, VM_IOREMAP, IOREMAP_START,
+ IOREMAP_END, __builtin_return_address(0));
if (!area)
return NULL;
vaddr = (unsigned long)area->addr;
@@ -66,7 +75,7 @@ void generic_iounmap(volatile void __iomem *addr)
if (!iounmap_allowed(vaddr))
return;
- if (is_vmalloc_addr(vaddr))
+ if (is_ioremap_addr(vaddr))
vunmap(vaddr);
}
--
2.34.1
By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(),
generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap()
and iounmap() are all visible and available to arch. Arch needs to
provide wrapper functions to override the generic versions if there's
arch specific handling in its ioremap_prot(), ioremap() or iounmap().
This change will simplify implementation by removing duplicated codes
with generic_ioremap_prot() and generic_iounmap(), and has the equivalent
functioality as before.
Here, add wrapper functions ioremap_prot() and iounmap() for SuperH's
special operation when ioremap() and iounmap().
Cc: Yoshinori Sato <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: [email protected]
Signed-off-by: Baoquan He <[email protected]>
---
v5->v6:
Based on the previous prep patch, this only focuses on converting to
GENERIC_IOREMAP for SuperH - Christoph
arch/sh/Kconfig | 1 +
arch/sh/include/asm/io.h | 40 +++++--------------------
arch/sh/mm/ioremap.c | 65 +++++++---------------------------------
3 files changed, 20 insertions(+), 86 deletions(-)
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index 9652d367fc37..f326985e46e0 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -28,6 +28,7 @@ config SUPERH
select GENERIC_SMP_IDLE_THREAD
select GUP_GET_PXX_LOW_HIGH if X2TLB
select HAS_IOPORT if HAS_IOPORT_MAP
+ select GENERIC_IOREMAP if MMU
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_KGDB
select HAVE_ARCH_SECCOMP_FILTER
diff --git a/arch/sh/include/asm/io.h b/arch/sh/include/asm/io.h
index 270e7952950c..b3a26b405c8d 100644
--- a/arch/sh/include/asm/io.h
+++ b/arch/sh/include/asm/io.h
@@ -266,40 +266,16 @@ unsigned long long poke_real_address_q(unsigned long long addr,
#endif
#ifdef CONFIG_MMU
-void iounmap(void __iomem *addr);
-void __iomem *__ioremap_caller(phys_addr_t offset, unsigned long size,
- pgprot_t prot, void *caller);
-
-static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
-{
- return __ioremap_caller(offset, size, PAGE_KERNEL_NOCACHE,
- __builtin_return_address(0));
-}
-
-static inline void __iomem *
-ioremap_cache(phys_addr_t offset, unsigned long size)
-{
- return __ioremap_caller(offset, size, PAGE_KERNEL,
- __builtin_return_address(0));
-}
-#define ioremap_cache ioremap_cache
-
-#ifdef CONFIG_HAVE_IOREMAP_PROT
-static inline void __iomem *ioremap_prot(phys_addr_t offset, unsigned long size,
- unsigned long flags)
-{
- return __ioremap_caller(offset, size, __pgprot(flags),
- __builtin_return_address(0));
-}
-#endif /* CONFIG_HAVE_IOREMAP_PROT */
+/*
+ * I/O memory mapping functions.
+ */
+#define ioremap_prot ioremap_prot
+#define iounmap iounmap
-#else /* CONFIG_MMU */
-static inline void __iomem *ioremap(phys_addr_t offset, size_t size)
-{
- return (void __iomem *)(unsigned long)offset;
-}
+#define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL_NOCACHE)
-static inline void iounmap(volatile void __iomem *addr) { }
+#define ioremap_cache(addr, size) \
+ ioremap_prot((addr), (size), pgprot_val(PAGE_KERNEL))
#endif /* CONFIG_MMU */
#define ioremap_uc ioremap
diff --git a/arch/sh/mm/ioremap.c b/arch/sh/mm/ioremap.c
index 21342581144d..c33b3daa4ad1 100644
--- a/arch/sh/mm/ioremap.c
+++ b/arch/sh/mm/ioremap.c
@@ -72,22 +72,11 @@ __ioremap_29bit(phys_addr_t offset, unsigned long size, pgprot_t prot)
#define __ioremap_29bit(offset, size, prot) NULL
#endif /* CONFIG_29BIT */
-/*
- * Remap an arbitrary physical address space into the kernel virtual
- * address space. Needed when the kernel wants to access high addresses
- * directly.
- *
- * NOTE! We need to allow non-page-aligned mappings too: we will obviously
- * have to convert them into an offset in a page-aligned mapping, but the
- * caller shouldn't need to know that small detail.
- */
-void __iomem * __ref
-__ioremap_caller(phys_addr_t phys_addr, unsigned long size,
- pgprot_t pgprot, void *caller)
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
+ unsigned long prot)
{
- struct vm_struct *area;
- unsigned long offset, last_addr, addr, orig_addr;
void __iomem *mapped;
+ pgprot_t pgprot = __pgprot(prot);
mapped = __ioremap_trapped(phys_addr, size);
if (mapped)
@@ -97,11 +86,6 @@ __ioremap_caller(phys_addr_t phys_addr, unsigned long size,
if (mapped)
return mapped;
- /* Don't allow wraparound or zero size */
- last_addr = phys_addr + size - 1;
- if (!size || last_addr < phys_addr)
- return NULL;
-
/*
* If we can't yet use the regular approach, go the fixmap route.
*/
@@ -112,34 +96,14 @@ __ioremap_caller(phys_addr_t phys_addr, unsigned long size,
* First try to remap through the PMB.
* PMB entries are all pre-faulted.
*/
- mapped = pmb_remap_caller(phys_addr, size, pgprot, caller);
+ mapped = pmb_remap_caller(phys_addr, size, pgprot,
+ __builtin_return_address(0));
if (mapped && !IS_ERR(mapped))
return mapped;
- /*
- * Mappings have to be page-aligned
- */
- offset = phys_addr & ~PAGE_MASK;
- phys_addr &= PAGE_MASK;
- size = PAGE_ALIGN(last_addr+1) - phys_addr;
-
- /*
- * Ok, go for it..
- */
- area = get_vm_area_caller(size, VM_IOREMAP, caller);
- if (!area)
- return NULL;
- area->phys_addr = phys_addr;
- orig_addr = addr = (unsigned long)area->addr;
-
- if (ioremap_page_range(addr, addr + size, phys_addr, pgprot)) {
- vunmap((void *)orig_addr);
- return NULL;
- }
-
- return (void __iomem *)(offset + (char *)orig_addr);
+ return generic_ioremap_prot(phys_addr, size, pgprot);
}
-EXPORT_SYMBOL(__ioremap_caller);
+EXPORT_SYMBOL(ioremap_prot);
/*
* Simple checks for non-translatable mappings.
@@ -158,10 +122,9 @@ static inline int iomapping_nontranslatable(unsigned long offset)
return 0;
}
-void iounmap(void __iomem *addr)
+void iounmap(volatile void __iomem *addr)
{
unsigned long vaddr = (unsigned long __force)addr;
- struct vm_struct *p;
/*
* Nothing to do if there is no translatable mapping.
@@ -172,21 +135,15 @@ void iounmap(void __iomem *addr)
/*
* There's no VMA if it's from an early fixed mapping.
*/
- if (iounmap_fixed(addr) == 0)
+ if (iounmap_fixed((void __iomem *)addr) == 0)
return;
/*
* If the PMB handled it, there's nothing else to do.
*/
- if (pmb_unmap(addr) == 0)
+ if (pmb_unmap((void __iomem *)addr) == 0)
return;
- p = remove_vm_area((void *)(vaddr & PAGE_MASK));
- if (!p) {
- printk(KERN_ERR "%s: bad address %p\n", __func__, addr);
- return;
- }
-
- kfree(p);
+ generic_iounmap(addr);
}
EXPORT_SYMBOL(iounmap);
--
2.34.1
By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(),
generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap()
and iounmap() are all visible and available to arch. Arch needs to
provide wrapper functions to override the generic versions if there's
arch specific handling in its ioremap_prot(), ioremap() or iounmap().
This change will simplify implementation by removing duplicated codes
with generic_ioremap_prot() and generic_iounmap(), and has the equivalent
functioality as before.
Here, add wrapper functions ioremap_prot() and iounmap() for s390's
special operation when ioremap() and iounmap().
Signed-off-by: Baoquan He <[email protected]>
Reviewed-by: Niklas Schnelle <[email protected]>
Tested-by: Niklas Schnelle <[email protected]>
Reviewed-by: Christoph Hellwig <[email protected]>
Reviewed-by: Mike Rapoport (IBM) <[email protected]>
Cc: Gerald Schaefer <[email protected]>
Cc: Heiko Carstens <[email protected]>
Cc: Vasily Gorbik <[email protected]>
Cc: Alexander Gordeev <[email protected]>
Cc: Christian Borntraeger <[email protected]>
Cc: Sven Schnelle <[email protected]>
Cc: [email protected]
---
arch/s390/Kconfig | 1 +
arch/s390/include/asm/io.h | 21 ++++++++------
arch/s390/pci/pci.c | 57 +++++++-------------------------------
3 files changed, 23 insertions(+), 56 deletions(-)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 6dab9c1be508..e625bb0cc6c7 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -142,6 +142,7 @@ config S390
select GENERIC_SMP_IDLE_THREAD
select GENERIC_TIME_VSYSCALL
select GENERIC_VDSO_TIME_NS
+ select GENERIC_IOREMAP if PCI
select HAVE_ALIGNED_STRUCT_PAGE if SLUB
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_JUMP_LABEL
diff --git a/arch/s390/include/asm/io.h b/arch/s390/include/asm/io.h
index e3882b012bfa..4453ad7c11ac 100644
--- a/arch/s390/include/asm/io.h
+++ b/arch/s390/include/asm/io.h
@@ -22,11 +22,18 @@ void unxlate_dev_mem_ptr(phys_addr_t phys, void *addr);
#define IO_SPACE_LIMIT 0
-void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot);
-void __iomem *ioremap(phys_addr_t addr, size_t size);
-void __iomem *ioremap_wc(phys_addr_t addr, size_t size);
-void __iomem *ioremap_wt(phys_addr_t addr, size_t size);
-void iounmap(volatile void __iomem *addr);
+/*
+ * I/O memory mapping functions.
+ */
+#define ioremap_prot ioremap_prot
+#define iounmap iounmap
+
+#define _PAGE_IOREMAP pgprot_val(PAGE_KERNEL)
+
+#define ioremap_wc(addr, size) \
+ ioremap_prot((addr), (size), pgprot_val(pgprot_writecombine(PAGE_KERNEL)))
+#define ioremap_wt(addr, size) \
+ ioremap_prot((addr), (size), pgprot_val(pgprot_writethrough(PAGE_KERNEL)))
static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
{
@@ -51,10 +58,6 @@ static inline void ioport_unmap(void __iomem *p)
#define pci_iomap_wc pci_iomap_wc
#define pci_iomap_wc_range pci_iomap_wc_range
-#define ioremap ioremap
-#define ioremap_wt ioremap_wt
-#define ioremap_wc ioremap_wc
-
#define memcpy_fromio(dst, src, count) zpci_memcpy_fromio(dst, src, count)
#define memcpy_toio(dst, src, count) zpci_memcpy_toio(dst, src, count)
#define memset_io(dst, val, count) zpci_memset_io(dst, val, count)
diff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c
index afc3f33788da..d34d5813d006 100644
--- a/arch/s390/pci/pci.c
+++ b/arch/s390/pci/pci.c
@@ -244,62 +244,25 @@ void __iowrite64_copy(void __iomem *to, const void *from, size_t count)
zpci_memcpy_toio(to, from, count);
}
-static void __iomem *__ioremap(phys_addr_t addr, size_t size, pgprot_t prot)
+void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
+ unsigned long prot)
{
- unsigned long offset, vaddr;
- struct vm_struct *area;
- phys_addr_t last_addr;
-
- last_addr = addr + size - 1;
- if (!size || last_addr < addr)
- return NULL;
-
+ /*
+ * When PCI MIO instructions are unavailable the "physical" address
+ * encodes a hint for accessing the PCI memory space it represents.
+ * Just pass it unchanged such that ioread/iowrite can decode it.
+ */
if (!static_branch_unlikely(&have_mio))
- return (void __iomem *) addr;
+ return (void __iomem *)phys_addr;
- offset = addr & ~PAGE_MASK;
- addr &= PAGE_MASK;
- size = PAGE_ALIGN(size + offset);
- area = get_vm_area(size, VM_IOREMAP);
- if (!area)
- return NULL;
-
- vaddr = (unsigned long) area->addr;
- if (ioremap_page_range(vaddr, vaddr + size, addr, prot)) {
- free_vm_area(area);
- return NULL;
- }
- return (void __iomem *) ((unsigned long) area->addr + offset);
-}
-
-void __iomem *ioremap_prot(phys_addr_t addr, size_t size, unsigned long prot)
-{
- return __ioremap(addr, size, __pgprot(prot));
+ return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
}
EXPORT_SYMBOL(ioremap_prot);
-void __iomem *ioremap(phys_addr_t addr, size_t size)
-{
- return __ioremap(addr, size, PAGE_KERNEL);
-}
-EXPORT_SYMBOL(ioremap);
-
-void __iomem *ioremap_wc(phys_addr_t addr, size_t size)
-{
- return __ioremap(addr, size, pgprot_writecombine(PAGE_KERNEL));
-}
-EXPORT_SYMBOL(ioremap_wc);
-
-void __iomem *ioremap_wt(phys_addr_t addr, size_t size)
-{
- return __ioremap(addr, size, pgprot_writethrough(PAGE_KERNEL));
-}
-EXPORT_SYMBOL(ioremap_wt);
-
void iounmap(volatile void __iomem *addr)
{
if (static_branch_likely(&have_mio))
- vunmap((__force void *) ((unsigned long) addr & PAGE_MASK));
+ generic_iounmap(addr);
}
EXPORT_SYMBOL(iounmap);
--
2.34.1
Hi Baoquan,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
url: https://github.com/intel-lab-lkp/linux/commits/Baoquan-He/asm-generic-iomap-h-remove-ARCH_HAS_IOREMAP_xx-macros/20230609-160014
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20230609075528.9390-11-bhe%40redhat.com
patch subject: [PATCH v6 10/19] s390: mm: Convert to GENERIC_IOREMAP
config: s390-randconfig-r014-20230608 (https://download.01.org/0day-ci/archive/20230609/[email protected]/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build):
mkdir -p ~/bin
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# install s390 cross compiling tool for clang build
# apt-get install binutils-s390x-linux-gnu
git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
git fetch akpm-mm mm-everything
git checkout akpm-mm/mm-everything
b4 shazam https://lore.kernel.org/r/[email protected]
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang ~/bin/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/pcmcia/
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All errors (new ones prefixed by >>):
In file included from drivers/pcmcia/cistpl.c:21:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
547 | val = __raw_readb(PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
560 | val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
| ^
include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
| ^
In file included from drivers/pcmcia/cistpl.c:21:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
573 | val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
| ~~~~~~~~~~ ^
include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
| ^
include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
| ^
In file included from drivers/pcmcia/cistpl.c:21:
In file included from include/linux/pci.h:39:
In file included from include/linux/io.h:13:
In file included from arch/s390/include/asm/io.h:78:
include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
584 | __raw_writeb(value, PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
594 | __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
604 | __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
692 | readsb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
700 | readsw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
708 | readsl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
717 | writesb(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
726 | writesw(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
735 | writesl(PCI_IOBASE + addr, buffer, count);
| ~~~~~~~~~~ ^
>> drivers/pcmcia/cistpl.c:72:3: error: call to undeclared function 'iounmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
72 | iounmap(s->cis_virt);
| ^
arch/s390/include/asm/io.h:29:17: note: expanded from macro 'iounmap'
29 | #define iounmap iounmap
| ^
drivers/pcmcia/cistpl.c:72:3: note: did you mean 'vunmap'?
arch/s390/include/asm/io.h:29:17: note: expanded from macro 'iounmap'
29 | #define iounmap iounmap
| ^
include/linux/vmalloc.h:167:13: note: 'vunmap' declared here
167 | extern void vunmap(const void *addr);
| ^
>> drivers/pcmcia/cistpl.c:103:17: error: call to undeclared function 'ioremap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
103 | s->cis_virt = ioremap(mem->res->start, s->map_size);
| ^
>> drivers/pcmcia/cistpl.c:103:15: error: incompatible integer to pointer conversion assigning to 'void *' from 'int' [-Wint-conversion]
103 | s->cis_virt = ioremap(mem->res->start, s->map_size);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/pcmcia/cistpl.c:110:3: error: call to undeclared function 'iounmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
110 | iounmap(s->cis_virt);
| ^
arch/s390/include/asm/io.h:29:17: note: expanded from macro 'iounmap'
29 | #define iounmap iounmap
| ^
drivers/pcmcia/cistpl.c:117:4: error: call to undeclared function 'iounmap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
117 | iounmap(s->cis_virt);
| ^
arch/s390/include/asm/io.h:29:17: note: expanded from macro 'iounmap'
29 | #define iounmap iounmap
| ^
drivers/pcmcia/cistpl.c:118:15: error: incompatible integer to pointer conversion assigning to 'void *' from 'int' [-Wint-conversion]
118 | s->cis_virt = ioremap(mem->static_start, s->map_size);
| ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
12 warnings and 6 errors generated.
vim +/iounmap +72 drivers/pcmcia/cistpl.c
^1da177e4c3f41 Linus Torvalds 2005-04-16 60
^1da177e4c3f41 Linus Torvalds 2005-04-16 61 void release_cis_mem(struct pcmcia_socket *s)
^1da177e4c3f41 Linus Torvalds 2005-04-16 62 {
6b8e087b86c59c Dominik Brodowski 2010-01-12 63 mutex_lock(&s->ops_mutex);
^1da177e4c3f41 Linus Torvalds 2005-04-16 64 if (s->cis_mem.flags & MAP_ACTIVE) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 65 s->cis_mem.flags &= ~MAP_ACTIVE;
^1da177e4c3f41 Linus Torvalds 2005-04-16 66 s->ops->set_mem_map(s, &s->cis_mem);
^1da177e4c3f41 Linus Torvalds 2005-04-16 67 if (s->cis_mem.res) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 68 release_resource(s->cis_mem.res);
^1da177e4c3f41 Linus Torvalds 2005-04-16 69 kfree(s->cis_mem.res);
^1da177e4c3f41 Linus Torvalds 2005-04-16 70 s->cis_mem.res = NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 71 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 @72 iounmap(s->cis_virt);
^1da177e4c3f41 Linus Torvalds 2005-04-16 73 s->cis_virt = NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 74 }
6b8e087b86c59c Dominik Brodowski 2010-01-12 75 mutex_unlock(&s->ops_mutex);
^1da177e4c3f41 Linus Torvalds 2005-04-16 76 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 77
cc448baf85c8f2 Lee Jones 2021-03-12 78 /*
6e83ee075ed749 Dominik Brodowski 2010-03-02 79 * set_cis_map() - map the card memory at "card_offset" into virtual space.
6e83ee075ed749 Dominik Brodowski 2010-03-02 80 *
^1da177e4c3f41 Linus Torvalds 2005-04-16 81 * If flags & MAP_ATTRIB, map the attribute space, otherwise
^1da177e4c3f41 Linus Torvalds 2005-04-16 82 * map the memory space.
7ab24855482fbc Dominik Brodowski 2010-02-17 83 *
7ab24855482fbc Dominik Brodowski 2010-02-17 84 * Must be called with ops_mutex held.
^1da177e4c3f41 Linus Torvalds 2005-04-16 85 */
6e83ee075ed749 Dominik Brodowski 2010-03-02 86 static void __iomem *set_cis_map(struct pcmcia_socket *s,
6e83ee075ed749 Dominik Brodowski 2010-03-02 87 unsigned int card_offset, unsigned int flags)
^1da177e4c3f41 Linus Torvalds 2005-04-16 88 {
^1da177e4c3f41 Linus Torvalds 2005-04-16 89 pccard_mem_map *mem = &s->cis_mem;
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 90 int ret;
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 91
2e5a3e79091615 Dominik Brodowski 2005-07-28 92 if (!(s->features & SS_CAP_STATIC_MAP) && (mem->res == NULL)) {
6e83ee075ed749 Dominik Brodowski 2010-03-02 93 mem->res = pcmcia_find_mem_region(0, s->map_size,
6e83ee075ed749 Dominik Brodowski 2010-03-02 94 s->map_size, 0, s);
^1da177e4c3f41 Linus Torvalds 2005-04-16 95 if (mem->res == NULL) {
f2e6cf76751d47 Joe Perches 2014-10-10 96 dev_notice(&s->dev, "cs: unable to map card memory!\n");
^1da177e4c3f41 Linus Torvalds 2005-04-16 97 return NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 98 }
2e5a3e79091615 Dominik Brodowski 2005-07-28 99 s->cis_virt = NULL;
^1da177e4c3f41 Linus Torvalds 2005-04-16 100 }
2e5a3e79091615 Dominik Brodowski 2005-07-28 101
2e5a3e79091615 Dominik Brodowski 2005-07-28 102 if (!(s->features & SS_CAP_STATIC_MAP) && (!s->cis_virt))
2e5a3e79091615 Dominik Brodowski 2005-07-28 @103 s->cis_virt = ioremap(mem->res->start, s->map_size);
2e5a3e79091615 Dominik Brodowski 2005-07-28 104
^1da177e4c3f41 Linus Torvalds 2005-04-16 105 mem->card_start = card_offset;
^1da177e4c3f41 Linus Torvalds 2005-04-16 106 mem->flags = flags;
2e5a3e79091615 Dominik Brodowski 2005-07-28 107
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 108 ret = s->ops->set_mem_map(s, mem);
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 109 if (ret) {
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 110 iounmap(s->cis_virt);
2e5a3e79091615 Dominik Brodowski 2005-07-28 111 s->cis_virt = NULL;
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 112 return NULL;
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 113 }
2ad0a0a793cbd8 Dominik Brodowski 2005-06-27 114
^1da177e4c3f41 Linus Torvalds 2005-04-16 115 if (s->features & SS_CAP_STATIC_MAP) {
^1da177e4c3f41 Linus Torvalds 2005-04-16 116 if (s->cis_virt)
^1da177e4c3f41 Linus Torvalds 2005-04-16 117 iounmap(s->cis_virt);
^1da177e4c3f41 Linus Torvalds 2005-04-16 118 s->cis_virt = ioremap(mem->static_start, s->map_size);
^1da177e4c3f41 Linus Torvalds 2005-04-16 119 }
2e5a3e79091615 Dominik Brodowski 2005-07-28 120
^1da177e4c3f41 Linus Torvalds 2005-04-16 121 return s->cis_virt;
^1da177e4c3f41 Linus Torvalds 2005-04-16 122 }
^1da177e4c3f41 Linus Torvalds 2005-04-16 123
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Baoquan,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
url: https://github.com/intel-lab-lkp/linux/commits/Baoquan-He/asm-generic-iomap-h-remove-ARCH_HAS_IOREMAP_xx-macros/20230609-160014
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20230609075528.9390-11-bhe%40redhat.com
patch subject: [PATCH v6 10/19] s390: mm: Convert to GENERIC_IOREMAP
config: s390-defconfig (https://download.01.org/0day-ci/archive/20230610/[email protected]/config)
compiler: s390-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
mkdir -p ~/bin
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
git fetch akpm-mm mm-everything
git checkout akpm-mm/mm-everything
b4 shazam https://lore.kernel.org/r/[email protected]
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash arch/s390/
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All errors (new ones prefixed by >>):
In file included from arch/s390/kernel/perf_cpum_sf.c:25:
include/asm-generic/io.h: In function 'ioremap':
>> include/asm-generic/io.h:1089:41: error: '_PAGE_IOREMAP' undeclared (first use in this function); did you mean 'VM_IOREMAP'?
1089 | return ioremap_prot(addr, size, _PAGE_IOREMAP);
| ^~~~~~~~~~~~~
| VM_IOREMAP
include/asm-generic/io.h:1089:41: note: each undeclared identifier is reported only once for each function it appears in
vim +1089 include/asm-generic/io.h
80b0ca98f91ddb Christoph Hellwig 2019-08-13 1083
2fe481688890d6 Baoquan He 2023-06-09 1084 #ifndef ioremap
2fe481688890d6 Baoquan He 2023-06-09 1085 #define ioremap ioremap
80b0ca98f91ddb Christoph Hellwig 2019-08-13 1086 static inline void __iomem *ioremap(phys_addr_t addr, size_t size)
80b0ca98f91ddb Christoph Hellwig 2019-08-13 1087 {
80b0ca98f91ddb Christoph Hellwig 2019-08-13 1088 /* _PAGE_IOREMAP needs to be supplied by the architecture */
80b0ca98f91ddb Christoph Hellwig 2019-08-13 @1089 return ioremap_prot(addr, size, _PAGE_IOREMAP);
80b0ca98f91ddb Christoph Hellwig 2019-08-13 1090 }
2fe481688890d6 Baoquan He 2023-06-09 1091 #endif
80b0ca98f91ddb Christoph Hellwig 2019-08-13 1092 #endif /* !CONFIG_MMU || CONFIG_GENERIC_IOREMAP */
97c9801a15e5b0 Christoph Hellwig 2019-08-11 1093
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Hi Baoquan,
kernel test robot noticed the following build errors:
[auto build test ERROR on akpm-mm/mm-everything]
url: https://github.com/intel-lab-lkp/linux/commits/Baoquan-He/asm-generic-iomap-h-remove-ARCH_HAS_IOREMAP_xx-macros/20230609-160014
base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link: https://lore.kernel.org/r/20230609075528.9390-11-bhe%40redhat.com
patch subject: [PATCH v6 10/19] s390: mm: Convert to GENERIC_IOREMAP
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20230610/[email protected]/config)
compiler: s390-linux-gcc (GCC) 12.3.0
reproduce (this is a W=1 build):
mkdir -p ~/bin
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
git fetch akpm-mm mm-everything
git checkout akpm-mm/mm-everything
b4 shazam https://lore.kernel.org/r/[email protected]
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash drivers/net/arcnet/ drivers/net/ethernet/8390/ drivers/net/ethernet/fujitsu/ drivers/net/ethernet/smsc/ drivers/net/ethernet/xircom/ drivers/pcmcia/ drivers/tty/ipwireless/
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
All error/warnings (new ones prefixed by >>):
In file included from include/linux/io.h:13,
from include/linux/pci.h:39,
from drivers/pcmcia/cistpl.c:21:
drivers/pcmcia/cistpl.c: In function 'release_cis_mem':
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/pcmcia/cistpl.c:72:17: note: in expansion of macro 'iounmap'
72 | iounmap(s->cis_virt);
| ^~~~~~~
drivers/pcmcia/cistpl.c: In function 'set_cis_map':
>> drivers/pcmcia/cistpl.c:103:31: error: implicit declaration of function 'ioremap'; did you mean 'iounmap'? [-Werror=implicit-function-declaration]
103 | s->cis_virt = ioremap(mem->res->start, s->map_size);
| ^~~~~~~
| iounmap
>> drivers/pcmcia/cistpl.c:103:29: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
103 | s->cis_virt = ioremap(mem->res->start, s->map_size);
| ^
drivers/pcmcia/cistpl.c:118:29: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
118 | s->cis_virt = ioremap(mem->static_start, s->map_size);
| ^
cc1: some warnings being treated as errors
--
drivers/net/arcnet/com90xx.c: In function 'com90xx_probe':
>> drivers/net/arcnet/com90xx.c:225:24: error: implicit declaration of function 'ioremap'; did you mean 'ifr_map'? [-Werror=implicit-function-declaration]
225 | base = ioremap(*p, MIRROR_SIZE);
| ^~~~~~~
| ifr_map
>> drivers/net/arcnet/com90xx.c:225:22: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
225 | base = ioremap(*p, MIRROR_SIZE);
| ^
In file included from include/linux/scatterlist.h:9,
from include/linux/dma-mapping.h:10,
from include/linux/skbuff.h:28,
from include/net/net_namespace.h:43,
from include/linux/netdevice.h:38,
from drivers/net/arcnet/com90xx.c:36:
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/net/arcnet/com90xx.c:260:17: note: in expansion of macro 'iounmap'
260 | iounmap(base);
| ^~~~~~~
drivers/net/arcnet/com90xx.c: In function 'check_mirror':
drivers/net/arcnet/com90xx.c:444:11: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
444 | p = ioremap(addr, size);
| ^
drivers/net/arcnet/com90xx.c: In function 'com90xx_found':
drivers/net/arcnet/com90xx.c:526:23: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
526 | lp->mem_start = ioremap(dev->mem_start,
| ^
cc1: some warnings being treated as errors
--
drivers/net/arcnet/arc-rimi.c: In function 'check_mirror':
>> drivers/net/arcnet/arc-rimi.c:107:13: error: implicit declaration of function 'ioremap'; did you mean 'ifr_map'? [-Werror=implicit-function-declaration]
107 | p = ioremap(addr, size);
| ^~~~~~~
| ifr_map
>> drivers/net/arcnet/arc-rimi.c:107:11: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
107 | p = ioremap(addr, size);
| ^
In file included from include/linux/scatterlist.h:9,
from include/linux/dma-mapping.h:10,
from include/linux/skbuff.h:28,
from include/net/net_namespace.h:43,
from include/linux/netdevice.h:38,
from drivers/net/arcnet/arc-rimi.c:35:
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/net/arcnet/arc-rimi.c:113:17: note: in expansion of macro 'iounmap'
113 | iounmap(p);
| ^~~~~~~
drivers/net/arcnet/arc-rimi.c: In function 'arcrimi_found':
drivers/net/arcnet/arc-rimi.c:131:11: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
131 | p = ioremap(dev->mem_start, MIRROR_SIZE);
| ^
drivers/net/arcnet/arc-rimi.c:202:23: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
202 | lp->mem_start = ioremap(dev->mem_start,
| ^
cc1: some warnings being treated as errors
--
drivers/net/ethernet/8390/pcnet_cs.c: In function 'get_hwinfo':
>> drivers/net/ethernet/8390/pcnet_cs.c:291:12: error: implicit declaration of function 'ioremap'; did you mean 'ifr_map'? [-Werror=implicit-function-declaration]
291 | virt = ioremap(link->resource[2]->start,
| ^~~~~~~
| ifr_map
>> drivers/net/ethernet/8390/pcnet_cs.c:291:10: warning: assignment to 'u_char *' {aka 'unsigned char *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
291 | virt = ioremap(link->resource[2]->start,
| ^
In file included from include/linux/scatterlist.h:9,
from include/linux/dma-mapping.h:10,
from include/linux/skbuff.h:28,
from include/net/net_namespace.h:43,
from include/linux/netdevice.h:38,
from drivers/net/ethernet/8390/pcnet_cs.c:39:
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/net/ethernet/8390/pcnet_cs.c:312:5: note: in expansion of macro 'iounmap'
312 | iounmap(virt);
| ^~~~~~~
drivers/net/ethernet/8390/pcnet_cs.c: In function 'setup_shmem_window':
>> drivers/net/ethernet/8390/pcnet_cs.c:1441:16: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
1441 | info->base = ioremap(link->resource[3]->start,
| ^
cc1: some warnings being treated as errors
--
drivers/net/ethernet/fujitsu/fmvj18x_cs.c: In function 'fmvj18x_get_hwinfo':
>> drivers/net/ethernet/fujitsu/fmvj18x_cs.c:549:12: error: implicit declaration of function 'ioremap'; did you mean 'iounmap'? [-Werror=implicit-function-declaration]
549 | base = ioremap(link->resource[2]->start, resource_size(link->resource[2]));
| ^~~~~~~
| iounmap
>> drivers/net/ethernet/fujitsu/fmvj18x_cs.c:549:10: warning: assignment to 'u_char *' {aka 'unsigned char *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
549 | base = ioremap(link->resource[2]->start, resource_size(link->resource[2]));
| ^
In file included from include/linux/scatterlist.h:9,
from include/linux/dma-mapping.h:10,
from include/linux/skbuff.h:28,
from include/linux/if_ether.h:19,
from include/linux/ethtool.h:18,
from drivers/net/ethernet/fujitsu/fmvj18x_cs.c:45:
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/net/ethernet/fujitsu/fmvj18x_cs.c:579:5: note: in expansion of macro 'iounmap'
579 | iounmap(base);
| ^~~~~~~
drivers/net/ethernet/fujitsu/fmvj18x_cs.c: In function 'fmvj18x_setup_mfc':
drivers/net/ethernet/fujitsu/fmvj18x_cs.c:600:14: warning: assignment to 'u_char *' {aka 'unsigned char *'} from 'int' makes pointer from integer without a cast [-Wint-conversion]
600 | lp->base = ioremap(link->resource[3]->start,
| ^
cc1: some warnings being treated as errors
--
drivers/tty/ipwireless/main.c: In function 'ipwireless_probe':
>> drivers/tty/ipwireless/main.c:115:30: error: implicit declaration of function 'ioremap'; did you mean 'iounmap'? [-Werror=implicit-function-declaration]
115 | ipw->common_memory = ioremap(p_dev->resource[2]->start,
| ^~~~~~~
| iounmap
>> drivers/tty/ipwireless/main.c:115:28: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
115 | ipw->common_memory = ioremap(p_dev->resource[2]->start,
| ^
drivers/tty/ipwireless/main.c:139:26: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
139 | ipw->attr_memory = ioremap(p_dev->resource[3]->start,
| ^
In file included from include/linux/io.h:13,
from drivers/tty/ipwireless/main.c:26:
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/tty/ipwireless/main.c:155:9: note: in expansion of macro 'iounmap'
155 | iounmap(ipw->attr_memory);
| ^~~~~~~
cc1: some warnings being treated as errors
--
drivers/net/ethernet/smsc/smc91c92_cs.c: In function 'mhz_mfc_config':
>> drivers/net/ethernet/smsc/smc91c92_cs.c:447:17: error: implicit declaration of function 'ioremap'; did you mean 'ifr_map'? [-Werror=implicit-function-declaration]
447 | smc->base = ioremap(link->resource[2]->start,
| ^~~~~~~
| ifr_map
>> drivers/net/ethernet/smsc/smc91c92_cs.c:447:15: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
447 | smc->base = ioremap(link->resource[2]->start,
| ^
In file included from include/linux/scatterlist.h:9,
from include/linux/dma-mapping.h:10,
from include/linux/skbuff.h:28,
from include/net/net_namespace.h:43,
from include/linux/netdevice.h:38,
from drivers/net/ethernet/smsc/smc91c92_cs.c:38:
drivers/net/ethernet/smsc/smc91c92_cs.c: In function 'smc91c92_release':
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/net/ethernet/smsc/smc91c92_cs.c:962:17: note: in expansion of macro 'iounmap'
962 | iounmap(smc->base);
| ^~~~~~~
cc1: some warnings being treated as errors
--
drivers/net/ethernet/xircom/xirc2ps_cs.c: In function 'xirc2ps_config':
>> drivers/net/ethernet/xircom/xirc2ps_cs.c:843:28: error: implicit declaration of function 'ioremap'; did you mean 'iounmap'? [-Werror=implicit-function-declaration]
843 | local->dingo_ccr = ioremap(link->resource[2]->start, 0x1000) + 0x0800;
| ^~~~~~~
| iounmap
>> drivers/net/ethernet/xircom/xirc2ps_cs.c:843:26: warning: assignment to 'void *' from 'int' makes pointer from integer without a cast [-Wint-conversion]
843 | local->dingo_ccr = ioremap(link->resource[2]->start, 0x1000) + 0x0800;
| ^
In file included from include/linux/scatterlist.h:9,
from include/linux/dma-mapping.h:10,
from include/linux/skbuff.h:28,
from include/linux/if_ether.h:19,
from include/linux/ethtool.h:18,
from drivers/net/ethernet/xircom/xirc2ps_cs.c:77:
drivers/net/ethernet/xircom/xirc2ps_cs.c: In function 'xirc2ps_release':
>> arch/s390/include/asm/io.h:29:17: error: implicit declaration of function 'iounmap'; did you mean 'vunmap'? [-Werror=implicit-function-declaration]
29 | #define iounmap iounmap
| ^~~~~~~
drivers/net/ethernet/xircom/xirc2ps_cs.c:934:25: note: in expansion of macro 'iounmap'
934 | iounmap(local->dingo_ccr - 0x0800);
| ^~~~~~~
cc1: some warnings being treated as errors
vim +29 arch/s390/include/asm/io.h
24
25 /*
26 * I/O memory mapping functions.
27 */
28 #define ioremap_prot ioremap_prot
> 29 #define iounmap iounmap
30
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Looks good:
Reviewed-by: Christoph Hellwig <[email protected]>
Looks good:
Reviewed-by: Christoph Hellwig <[email protected]>
On Fri, Jun 09, 2023 at 03:55:18PM +0800, Baoquan He wrote:
> By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(),
> generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap()
> and iounmap() are all visible and available to arch. Arch needs to
> provide wrapper functions to override the generic versions if there's
> arch specific handling in its ioremap_prot(), ioremap() or iounmap().
> This change will simplify implementation by removing duplicated codes
> with generic_ioremap_prot() and generic_iounmap(), and has the equivalent
> functioality as before.
>
> For openrisc, the current ioremap() and iounmap() are the same as
> generic version. After taking GENERIC_IOREMAP way, the old ioremap()
> and iounmap() can be completely removed.
>
> Signed-off-by: Baoquan He <[email protected]>
> Cc: Stafford Horne <[email protected]>
> Cc: Jonas Bonn <[email protected]>
> Cc: Stefan Kristiansson <[email protected]>
> Cc: [email protected]
Reviewed-by: Mike Rapoport (IBM) <[email protected]>
> ---
> v5->v6:
> Remove iounmap() because it's the same as the generic version since we
> have removed the code handling ealry mapping from fixmap pool in
> patch 3 - Mike
>
> arch/openrisc/Kconfig | 1 +
> arch/openrisc/include/asm/io.h | 11 ++++----
> arch/openrisc/mm/ioremap.c | 49 ----------------------------------
> 3 files changed, 7 insertions(+), 54 deletions(-)
>
> diff --git a/arch/openrisc/Kconfig b/arch/openrisc/Kconfig
> index c7f282f60f64..fd9bb76a610b 100644
> --- a/arch/openrisc/Kconfig
> +++ b/arch/openrisc/Kconfig
> @@ -21,6 +21,7 @@ config OPENRISC
> select GENERIC_IRQ_PROBE
> select GENERIC_IRQ_SHOW
> select GENERIC_PCI_IOMAP
> + select GENERIC_IOREMAP
> select GENERIC_CPU_DEVICES
> select HAVE_PCI
> select HAVE_UID16
> diff --git a/arch/openrisc/include/asm/io.h b/arch/openrisc/include/asm/io.h
> index ee6043a03173..5a6f0f16a5ce 100644
> --- a/arch/openrisc/include/asm/io.h
> +++ b/arch/openrisc/include/asm/io.h
> @@ -15,6 +15,8 @@
> #define __ASM_OPENRISC_IO_H
>
> #include <linux/types.h>
> +#include <asm/pgalloc.h>
> +#include <asm/pgtable.h>
>
> /*
> * PCI: We do not use IO ports in OpenRISC
> @@ -27,11 +29,10 @@
> #define PIO_OFFSET 0
> #define PIO_MASK 0
>
> -#define ioremap ioremap
> -void __iomem *ioremap(phys_addr_t offset, unsigned long size);
> -
> -#define iounmap iounmap
> -extern void iounmap(volatile void __iomem *addr);
> +/*
> + * I/O memory mapping functions.
> + */
> +#define _PAGE_IOREMAP (pgprot_val(PAGE_KERNEL) | _PAGE_CI)
>
> #include <asm-generic/io.h>
>
> diff --git a/arch/openrisc/mm/ioremap.c b/arch/openrisc/mm/ioremap.c
> index cdbcc7e73684..91c8259d4b7e 100644
> --- a/arch/openrisc/mm/ioremap.c
> +++ b/arch/openrisc/mm/ioremap.c
> @@ -22,55 +22,6 @@
>
> extern int mem_init_done;
>
> -/*
> - * Remap an arbitrary physical address space into the kernel virtual
> - * address space. Needed when the kernel wants to access high addresses
> - * directly.
> - *
> - * NOTE! We need to allow non-page-aligned mappings too: we will obviously
> - * have to convert them into an offset in a page-aligned mapping, but the
> - * caller shouldn't need to know that small detail.
> - */
> -void __iomem *__ref ioremap(phys_addr_t addr, unsigned long size)
> -{
> - phys_addr_t p;
> - unsigned long v;
> - unsigned long offset, last_addr;
> - struct vm_struct *area = NULL;
> -
> - /* Don't allow wraparound or zero size */
> - last_addr = addr + size - 1;
> - if (!size || last_addr < addr)
> - return NULL;
> -
> - /*
> - * Mappings have to be page-aligned
> - */
> - offset = addr & ~PAGE_MASK;
> - p = addr & PAGE_MASK;
> - size = PAGE_ALIGN(last_addr + 1) - p;
> -
> - area = get_vm_area(size, VM_IOREMAP);
> - if (!area)
> - return NULL;
> - v = (unsigned long)area->addr;
> -
> - if (ioremap_page_range(v, v + size, p,
> - __pgprot(pgprot_val(PAGE_KERNEL) | _PAGE_CI))) {
> - vfree(area->addr);
> - return NULL;
> - }
> -
> - return (void __iomem *)(offset + (char *)v);
> -}
> -EXPORT_SYMBOL(ioremap);
> -
> -void iounmap(volatile void __iomem *addr)
> -{
> - return vfree((void *)(PAGE_MASK & (unsigned long)addr));
> -}
> -EXPORT_SYMBOL(iounmap);
> -
> /**
> * OK, this one's a bit tricky... ioremap can get called before memory is
> * initialized (early serial console does this) and will want to alloc a page
> --
> 2.34.1
>
--
Sincerely yours,
Mike.
On 06/10/23 at 01:42am, kernel test robot wrote:
> Hi Baoquan,
>
> kernel test robot noticed the following build errors:
>
> [auto build test ERROR on akpm-mm/mm-everything]
>
> url: https://github.com/intel-lab-lkp/linux/commits/Baoquan-He/asm-generic-iomap-h-remove-ARCH_HAS_IOREMAP_xx-macros/20230609-160014
> base: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
> patch link: https://lore.kernel.org/r/20230609075528.9390-11-bhe%40redhat.com
> patch subject: [PATCH v6 10/19] s390: mm: Convert to GENERIC_IOREMAP
> config: s390-defconfig (https://download.01.org/0day-ci/archive/20230610/[email protected]/config)
> compiler: s390-linux-gcc (GCC) 12.3.0
> reproduce (this is a W=1 build):
> mkdir -p ~/bin
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
> git fetch akpm-mm mm-everything
> git checkout akpm-mm/mm-everything
> b4 shazam https://lore.kernel.org/r/[email protected]
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=s390 SHELL=/bin/bash arch/s390/
>
Thanks for reporting.
I tried to reproduce with above steps, while failed with below message.
Later I got a s390x machine to reproduce the failure, and made a fix in
below patch.
[root@dell-pem620-01 linux]# COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.3.0 ~/bin/make.cross W=1 O=build_dir ARCH=s390 olddefconfig
Compiler will be installed in /root/0day
lftpget -c https://download.01.org/0day-ci/cross-package/./gcc-12.3.0-nolibc/x86_64-gcc-12.3.0-nolibc_s390-linux.tar.xz
/root/linux
tar Jxf /root/0day/gcc-12.3.0-nolibc/x86_64-gcc-12.3.0-nolibc_s390-linux.tar.xz -C /root/0day
Please update: libc6 or glibc
ldd /root/0day/gcc-12.3.0-nolibc/s390-linux/bin/s390-linux-gcc
/root/0day/gcc-12.3.0-nolibc/s390-linux/bin/s390-linux-gcc: /lib64/libc.so.6: version `GLIBC_2.36' not found (required by /root/0day/gcc-12.3.0-nolibc/s390-linux/bin/s390-linux-gcc)
setup_crosstool failed
From 26aedf424dac7e58dd1389e554cfe0693e2b371f Mon Sep 17 00:00:00 2001
From: Baoquan He <[email protected]>
Date: Sun, 11 Jun 2023 18:37:43 +0800
Subject: [PATCH] s390: mm: fix building error when converting to
GENERIC_IOREMAP
Content-type: text/plain
We should always include <asm/io.h> in ARCH, but not <asm-generic/io.h>
directly. Otherwise, macro defined by ARCH won't be seen and could cause
building error.
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Baoquan He <[email protected]>
---
arch/s390/kernel/perf_cpum_sf.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 7ef72f5ff52e..b0269f3881aa 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/arch/s390/kernel/perf_cpum_sf.c
@@ -22,7 +22,7 @@
#include <asm/irq.h>
#include <asm/debug.h>
#include <asm/timex.h>
-#include <asm-generic/io.h>
+#include <asm/io.h>
/* Minimum number of sample-data-block-tables:
* At least one table is required for the sampling buffer structure.
--
2.34.1
On Fri, Jun 09, 2023 at 03:55:27PM +0800, Baoquan He wrote:
> Since hook functions ioremap_allowed() and iounmap_allowed() will be
> obsoleted, add wrapper function ioremap_prot() to contain the
> specific handling in addition to generic_ioremap_prot() invocation.
>
> Signed-off-by: Baoquan He <[email protected]>
> Reviewed-by: Christoph Hellwig <[email protected]>
> Reviewed-by: Kefeng Wang <[email protected]>
> Reviewed-by: Mike Rapoport (IBM) <[email protected]>
> Cc: Catalin Marinas <[email protected]>
> Cc: Will Deacon <[email protected]>
> Cc: [email protected]
Acked-by: Catalin Marinas <[email protected]>
On 6/9/23 09:55, Baoquan He wrote:
> By taking GENERIC_IOREMAP method, the generic generic_ioremap_prot(),
> generic_iounmap(), and their generic wrapper ioremap_prot(), ioremap()
> and iounmap() are all visible and available to arch. Arch needs to
> provide wrapper functions to override the generic versions if there's
> arch specific handling in its ioremap_prot(), ioremap() or iounmap().
> This change will simplify implementation by removing duplicated codes
> with generic_ioremap_prot() and generic_iounmap(), and has the equivalent
> functioality as before.
>
> Here, add wrapper function ioremap_prot() for parisc's special operation
> when iounmap().
>
> Signed-off-by: Baoquan He <[email protected]>
> Reviewed-by: Christoph Hellwig <[email protected]>
> Cc: "James E.J. Bottomley" <[email protected]>
> Cc: Helge Deller <[email protected]>
> Cc: [email protected]
Acked-by: Helge Deller <[email protected]> # parisc
Thanks!
Helge
> ---
> v5->v6:
> Remove the stale paragraph related to ARCH_HAS_IOREMAP_WC adding in
> log - Mike
>
> arch/parisc/Kconfig | 1 +
> arch/parisc/include/asm/io.h | 15 ++++++---
> arch/parisc/mm/ioremap.c | 62 +++---------------------------------
> 3 files changed, 15 insertions(+), 63 deletions(-)
>
> diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
> index 967bde65dd0e..315cc42b1a2c 100644
> --- a/arch/parisc/Kconfig
> +++ b/arch/parisc/Kconfig
> @@ -36,6 +36,7 @@ config PARISC
> select GENERIC_ATOMIC64 if !64BIT
> select GENERIC_IRQ_PROBE
> select GENERIC_PCI_IOMAP
> + select GENERIC_IOREMAP
> select ARCH_HAVE_NMI_SAFE_CMPXCHG
> select GENERIC_SMP_IDLE_THREAD
> select GENERIC_ARCH_TOPOLOGY if SMP
> diff --git a/arch/parisc/include/asm/io.h b/arch/parisc/include/asm/io.h
> index c05e781be2f5..366537042465 100644
> --- a/arch/parisc/include/asm/io.h
> +++ b/arch/parisc/include/asm/io.h
> @@ -125,12 +125,17 @@ static inline void gsc_writeq(unsigned long long val, unsigned long addr)
> /*
> * The standard PCI ioremap interfaces
> */
> -void __iomem *ioremap(unsigned long offset, unsigned long size);
> -#define ioremap_wc ioremap
> -#define ioremap_uc ioremap
> -#define pci_iounmap pci_iounmap
> +#define ioremap_prot ioremap_prot
> +
> +#define _PAGE_IOREMAP (_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY | \
> + _PAGE_ACCESSED | _PAGE_NO_CACHE)
>
> -extern void iounmap(const volatile void __iomem *addr);
> +#define ioremap_wc(addr, size) \
> + ioremap_prot((addr), (size), _PAGE_IOREMAP)
> +#define ioremap_uc(addr, size) \
> + ioremap_prot((addr), (size), _PAGE_IOREMAP)
> +
> +#define pci_iounmap pci_iounmap
>
> void memset_io(volatile void __iomem *addr, unsigned char val, int count);
> void memcpy_fromio(void *dst, const volatile void __iomem *src, int count);
> diff --git a/arch/parisc/mm/ioremap.c b/arch/parisc/mm/ioremap.c
> index 345ff0b66499..fd996472dfe7 100644
> --- a/arch/parisc/mm/ioremap.c
> +++ b/arch/parisc/mm/ioremap.c
> @@ -13,25 +13,9 @@
> #include <linux/io.h>
> #include <linux/mm.h>
>
> -/*
> - * Generic mapping function (not visible outside):
> - */
> -
> -/*
> - * Remap an arbitrary physical address space into the kernel virtual
> - * address space.
> - *
> - * NOTE! We need to allow non-page-aligned mappings too: we will obviously
> - * have to convert them into an offset in a page-aligned mapping, but the
> - * caller shouldn't need to know that small detail.
> - */
> -void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
> +void __iomem *ioremap_prot(phys_addr_t phys_addr, size_t size,
> + unsigned long prot)
> {
> - void __iomem *addr;
> - struct vm_struct *area;
> - unsigned long offset, last_addr;
> - pgprot_t pgprot;
> -
> #ifdef CONFIG_EISA
> unsigned long end = phys_addr + size - 1;
> /* Support EISA addresses */
> @@ -40,11 +24,6 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
> phys_addr |= F_EXTEND(0xfc000000);
> #endif
>
> - /* Don't allow wraparound or zero size */
> - last_addr = phys_addr + size - 1;
> - if (!size || last_addr < phys_addr)
> - return NULL;
> -
> /*
> * Don't allow anybody to remap normal RAM that we're using..
> */
> @@ -62,39 +41,6 @@ void __iomem *ioremap(unsigned long phys_addr, unsigned long size)
> }
> }
>
> - pgprot = __pgprot(_PAGE_PRESENT | _PAGE_RW | _PAGE_DIRTY |
> - _PAGE_ACCESSED | _PAGE_NO_CACHE);
> -
> - /*
> - * Mappings have to be page-aligned
> - */
> - offset = phys_addr & ~PAGE_MASK;
> - phys_addr &= PAGE_MASK;
> - size = PAGE_ALIGN(last_addr + 1) - phys_addr;
> -
> - /*
> - * Ok, go for it..
> - */
> - area = get_vm_area(size, VM_IOREMAP);
> - if (!area)
> - return NULL;
> -
> - addr = (void __iomem *) area->addr;
> - if (ioremap_page_range((unsigned long)addr, (unsigned long)addr + size,
> - phys_addr, pgprot)) {
> - vunmap(addr);
> - return NULL;
> - }
> -
> - return (void __iomem *) (offset + (char __iomem *)addr);
> -}
> -EXPORT_SYMBOL(ioremap);
> -
> -void iounmap(const volatile void __iomem *io_addr)
> -{
> - unsigned long addr = (unsigned long)io_addr & PAGE_MASK;
> -
> - if (is_vmalloc_addr((void *)addr))
> - vunmap((void *)addr);
> + return generic_ioremap_prot(phys_addr, size, __pgprot(prot));
> }
> -EXPORT_SYMBOL(iounmap);
> +EXPORT_SYMBOL(ioremap_prot);
On Sun, Jun 11, 2023 at 07:10:44PM +0800, Baoquan He wrote:
Hi Baoquan,
> From 26aedf424dac7e58dd1389e554cfe0693e2b371f Mon Sep 17 00:00:00 2001
> From: Baoquan He <[email protected]>
> Date: Sun, 11 Jun 2023 18:37:43 +0800
> Subject: [PATCH] s390: mm: fix building error when converting to
> GENERIC_IOREMAP
> Content-type: text/plain
>
> We should always include <asm/io.h> in ARCH, but not <asm-generic/io.h>
> directly. Otherwise, macro defined by ARCH won't be seen and could cause
> building error.
>
> Reported-by: kernel test robot <[email protected]>
> Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
> Signed-off-by: Baoquan He <[email protected]>
> ---
> arch/s390/kernel/perf_cpum_sf.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
> index 7ef72f5ff52e..b0269f3881aa 100644
> --- a/arch/s390/kernel/perf_cpum_sf.c
> +++ b/arch/s390/kernel/perf_cpum_sf.c
> @@ -22,7 +22,7 @@
> #include <asm/irq.h>
> #include <asm/debug.h>
> #include <asm/timex.h>
> -#include <asm-generic/io.h>
> +#include <asm/io.h>
>
> /* Minimum number of sample-data-block-tables:
> * At least one table is required for the sampling buffer structure.
Applied, thanks!