LinuxLists.cc - [PATCH] sparse: use static inline for __chk_{user,io}

2020-06-28 07:24:08

Subject: [PATCH] sparse: use static inline for __chk_{user,io}_ptr()

__chk_user_ptr() & __chk_io_ptr() are dummy extern functions which
only exist to enforce the typechecking of __user or __iomem pointers
in macros when using sparse.

This typechecking is done by inserting a call to these functions.
But the presence of these calls can inhibit some simplifications
and so influence the result of sparse's analysis of context/locking.

Fix this by changing these calls into static inline calls with
an empty body.

Signed-off-by: Luc Van Oostenryck <[email protected]>
---
include/linux/compiler_types.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h
index b67930216e45..a9b6699f3934 100644
--- a/include/linux/compiler_types.h
+++ b/include/linux/compiler_types.h
@@ -11,8 +11,8 @@
# define __iomem __attribute__((noderef, address_space(__iomem)))
# define __percpu __attribute__((noderef, address_space(__percpu)))
# define __rcu __attribute__((noderef, address_space(__rcu)))
-extern void __chk_user_ptr(const volatile void __user *);
-extern void __chk_io_ptr(const volatile void __iomem *);
+static inline void __chk_user_ptr(const volatile void __user *ptr) { }
+static inline void __chk_io_ptr(const volatile void __iomem *ptr) { }
/* context/locking */
# define __must_hold(x) __attribute__((context(x,1,1)))
# define __acquires(x) __attribute__((context(x,0,1)))
--
2.27.0

2020-06-29 18:47:52

by Luc Van Oostenryck

[permalink] [raw]

Subject: Re: [PATCH] sparse: use static inline for __chk_{user,io}_ptr()

On Tue, Jun 30, 2020 at 02:08:36AM +0800, kernel test robot wrote:
> Hi Luc,
>
> I love your patch! Perhaps something to improve:
>
> [auto build test WARNING on next-20200626]
> [cannot apply to linux/master linus/master v5.8-rc2 v5.8-rc1 v5.7 v5.8-rc3]
> [If your patch is applied to the wrong git tree, kindly drop us a note.

This patch should be applied on top of akpm's tree or on top of next.
I'm not sure hwo I should have specified this, 'git send-mail --base=...'
is less useful for these trees.

-- Luc

2020-06-29 19:11:33

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH] sparse: use static inline for __chk_{user,io}_ptr()

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2020-06-29 19:32:13

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH] sparse: use static inline for __chk_{user,io}_ptr()

Hi Luc,

I love your patch! Perhaps something to improve:

[auto build test WARNING on next-20200626]
[cannot apply to linux/master linus/master v5.8-rc2 v5.8-rc1 v5.7 v5.8-rc3]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use as documented in
https://git-scm.com/docs/git-format-patch]

url: https://github.com/0day-ci/linux/commits/Luc-Van-Oostenryck/sparse-use-static-inline-for-__chk_-user-io-_ptr/20200628-152401
base: 36e3135df4d426612fc77db26a312c2531108603
config: i386-randconfig-s002-20200629 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce:
# apt-get install sparse
# sparse version: v0.6.2-3-gfa153962-dirty
# save the attached .config to linux build tree
make W=1 C= CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=i386

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <[email protected]>

sparse warnings: (new ones prefixed by >>)

drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:818:42: sparse: sparse: cast removes address space '__iomem' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c:2388:21: sparse: sparse: cast removes address space '__user' of expression
--
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
>> drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:384:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c:399:21: sparse: sparse: cast removes address space '__user' of expression
--
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:138:17: sparse: sparse: incorrect type in initializer (different base types) @@ expected restricted __poll_t ( *poll )( ... ) @@ got unsigned int ( * )( ... ) @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:138:17: sparse: expected restricted __poll_t ( *poll )( ... )
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:138:17: sparse: got unsigned int ( * )( ... )
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
>> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
>> drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:261:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:263:29: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:354:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:412:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:473:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:531:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: expected void const volatile [noderef] __user *ptr
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: got unsigned int [usertype] *
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:592:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:650:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:650:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:650:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:650:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:650:21: sparse: sparse: cast removes address space '__user' of expression
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:650:21: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned int [usertype] * @@
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c:650:21: sparse: expected void const volatile [noderef] __user *ptr

vim +2388 drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c

d38ceaf99ed015 Alex Deucher 2015-04-20 2362
50da51744f005f Tom St Denis 2018-05-09 2363 /**
50da51744f005f Tom St Denis 2018-05-09 2364 * amdgpu_ttm_vram_write - Linear write access to VRAM
50da51744f005f Tom St Denis 2018-05-09 2365 *
50da51744f005f Tom St Denis 2018-05-09 2366 * Accesses VRAM via MMIO for debugging purposes.
50da51744f005f Tom St Denis 2018-05-09 2367 */
08cab989f77582 Tom St Denis 2017-08-29 2368 static ssize_t amdgpu_ttm_vram_write(struct file *f, const char __user *buf,
08cab989f77582 Tom St Denis 2017-08-29 2369 size_t size, loff_t *pos)
08cab989f77582 Tom St Denis 2017-08-29 2370 {
08cab989f77582 Tom St Denis 2017-08-29 2371 struct amdgpu_device *adev = file_inode(f)->i_private;
08cab989f77582 Tom St Denis 2017-08-29 2372 ssize_t result = 0;
08cab989f77582 Tom St Denis 2017-08-29 2373 int r;
08cab989f77582 Tom St Denis 2017-08-29 2374
08cab989f77582 Tom St Denis 2017-08-29 2375 if (size & 0x3 || *pos & 0x3)
08cab989f77582 Tom St Denis 2017-08-29 2376 return -EINVAL;
08cab989f77582 Tom St Denis 2017-08-29 2377
770d13b19fdf36 Christian K?nig 2018-01-12 2378 if (*pos >= adev->gmc.mc_vram_size)
08cab989f77582 Tom St Denis 2017-08-29 2379 return -ENXIO;
08cab989f77582 Tom St Denis 2017-08-29 2380
08cab989f77582 Tom St Denis 2017-08-29 2381 while (size) {
08cab989f77582 Tom St Denis 2017-08-29 2382 unsigned long flags;
08cab989f77582 Tom St Denis 2017-08-29 2383 uint32_t value;
08cab989f77582 Tom St Denis 2017-08-29 2384
770d13b19fdf36 Christian K?nig 2018-01-12 2385 if (*pos >= adev->gmc.mc_vram_size)
08cab989f77582 Tom St Denis 2017-08-29 2386 return result;
08cab989f77582 Tom St Denis 2017-08-29 2387
08cab989f77582 Tom St Denis 2017-08-29 @2388 r = get_user(value, (uint32_t *)buf);
08cab989f77582 Tom St Denis 2017-08-29 2389 if (r)
08cab989f77582 Tom St Denis 2017-08-29 2390 return r;
08cab989f77582 Tom St Denis 2017-08-29 2391
08cab989f77582 Tom St Denis 2017-08-29 2392 spin_lock_irqsave(&adev->mmio_idx_lock, flags);
c30572814df55b Tom St Denis 2017-09-13 2393 WREG32_NO_KIQ(mmMM_INDEX, ((uint32_t)*pos) | 0x80000000);
c30572814df55b Tom St Denis 2017-09-13 2394 WREG32_NO_KIQ(mmMM_INDEX_HI, *pos >> 31);
c30572814df55b Tom St Denis 2017-09-13 2395 WREG32_NO_KIQ(mmMM_DATA, value);
08cab989f77582 Tom St Denis 2017-08-29 2396 spin_unlock_irqrestore(&adev->mmio_idx_lock, flags);
08cab989f77582 Tom St Denis 2017-08-29 2397
08cab989f77582 Tom St Denis 2017-08-29 2398 result += 4;
08cab989f77582 Tom St Denis 2017-08-29 2399 buf += 4;
08cab989f77582 Tom St Denis 2017-08-29 2400 *pos += 4;
08cab989f77582 Tom St Denis 2017-08-29 2401 size -= 4;
08cab989f77582 Tom St Denis 2017-08-29 2402 }
08cab989f77582 Tom St Denis 2017-08-29 2403
08cab989f77582 Tom St Denis 2017-08-29 2404 return result;
08cab989f77582 Tom St Denis 2017-08-29 2405 }
08cab989f77582 Tom St Denis 2017-08-29 2406

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/[email protected]

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2020-06-30 00:32:59

by Chen, Rong A

[permalink] [raw]

Subject: Re: [kbuild-all] Re: [PATCH] sparse: use static inline for __chk_{user,io}_ptr()

On 6/30/20 2:37 AM, Luc Van Oostenryck wrote:
> On Tue, Jun 30, 2020 at 02:08:36AM +0800, kernel test robot wrote:
>> Hi Luc,
>>
>> I love your patch! Perhaps something to improve:
>>
>> [auto build test WARNING on next-20200626]
>> [cannot apply to linux/master linus/master v5.8-rc2 v5.8-rc1 v5.7 v5.8-rc3]
>> [If your patch is applied to the wrong git tree, kindly drop us a note.
> This patch should be applied on top of akpm's tree or on top of next.
> I'm not sure hwo I should have specified this, 'git send-mail --base=...'
> is less useful for these trees.

Hi Luc,

Thanks for the feedback, we'll fix the wrong base.

Best Regards,
Rong Chen

2020-07-01 18:39:30

by kernel test robot

[permalink] [raw]

Subject: Re: [PATCH] sparse: use static inline for __chk_{user,io}_ptr()

Hi Luc,

I love your patch! Perhaps something
[auto build test WARNING on next-20200626]
# apt-get install sparse
# sparse version: v0.6.2-3-gfa153962-dirty
following tag as appropriate
href="/cdn-cgi/l/email-protection#2d0b41591641465d6d4443594841034e42400b4a5916"><[email protected]>
by >>)
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got unsigned long long [usertype] * @@
expected void const volatile [noderef] __user *ptr
got unsigned long long [usertype] *
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: cast removes address space '__user' of expression
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got char *buf @@
sparse: expected void const volatile [noderef] __user *ptr
got char *buf
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got char const *buf @@
expected void const volatile [noderef] __user *ptr
got char const *buf
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got char const * @@
sparse: expected void const volatile [noderef] __user *ptr
got char const *
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void [noderef] __user *to @@ got struct watchdog_info * @@
expected void [noderef] __user *to
got struct watchdog_info *
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got int * @@
expected void const volatile [noderef] __user *ptr
got int *
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got int * @@
expected void const volatile [noderef] __user *ptr
got int *
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got int * @@
expected void const volatile [noderef] __user *ptr
got int *
sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected void const volatile [noderef] __user *ptr @@ got int * @@
expected void const volatile [noderef] __user *ptr
got int *
sparse: sparse: incorrect type in initializer (incompatible argument 2 (different address spaces)) @@ expected long ( *write )( ... ) @@ got long ( * )( ... ) @@
expected long ( *write )( ... )
got long ( * )( ... )
Linus Torvalds 2005-04-16 299
Al Viro 2012-11-09 300 int ia32_setup_rt_frame(int sig, struct ksignal *ksig,
Linus Torvalds 2005-04-16 301 compat_sigset_t *set, struct pt_regs *regs)
Linus Torvalds 2005-04-16 302 {
Hiroshi Shimamoto 2008-12-17 303 struct rt_sigframe_ia32 __user *frame;
Roland McGrath 2008-01-30 304 void __user *restorer;
Al Viro 2020-02-15 305 void __user *fp = NULL;
Linus Torvalds 2005-04-16 306
Al Viro 2020-02-15 307 /* unsafe_put_user optimizes that into a single 8 byte store */
Thomas Gleixner 2008-01-30 308 static const struct {
Thomas Gleixner 2008-01-30 309 u8 movl;
Thomas Gleixner 2008-01-30 310 u32 val;
Thomas Gleixner 2008-01-30 311 u16 int80;
Hiroshi Shimamoto 2008-11-11 312 u8 pad;
Thomas Gleixner 2008-01-30 313 } __attribute__((packed)) code = {
Thomas Gleixner 2008-01-30 314 0xb8,
Thomas Gleixner 2008-01-30 315 __NR_ia32_rt_sigreturn,
Thomas Gleixner 2008-01-30 316 0x80cd,
Thomas Gleixner 2008-01-30 317 0,
Thomas Gleixner 2008-01-30 318 };
Thomas Gleixner 2008-01-30 319
Al Viro 2020-02-15 320 frame = get_sigframe(ksig, regs, sizeof(*frame), &fp);
Linus Torvalds 2005-04-16 321
Al Viro 2020-02-15 322 if (!user_access_begin(frame, sizeof(*frame)))
Hiroshi Shimamoto 2008-09-12 323 return -EFAULT;
Linus Torvalds 2005-04-16 324
Al Viro 2020-02-15 325 unsafe_put_user(sig, &frame->sig, Efault);
Al Viro 2020-02-15 326 unsafe_put_user(ptr_to_compat(&frame->info), &frame->pinfo, Efault);
Al Viro 2020-02-15 327 unsafe_put_user(ptr_to_compat(&frame->uc), &frame->puc, Efault);
Linus Torvalds 2005-04-16 328
Linus Torvalds 2005-04-16 329 /* Create the ucontext. */
Marco Elver 2019-07-11 330 if (static_cpu_has(X86_FEATURE_XSAVE))
Al Viro 2020-02-15 331 unsafe_put_user(UC_FP_XSTATE, &frame->uc.uc_flags, Efault);
Suresh Siddha 2008-07-29 332 else
Al Viro 2020-02-15 333 unsafe_put_user(0, &frame->uc.uc_flags, Efault);
Al Viro 2020-02-15 334 unsafe_put_user(0, &frame->uc.uc_link, Efault);
Al Viro 2020-02-15 335 unsafe_compat_save_altstack(&frame->uc.uc_stack, regs->sp, Efault);
Linus Torvalds 2005-04-16 336
Al Viro 2012-11-09 337 if (ksig->ka.sa.sa_flags & SA_RESTORER)
Al Viro 2012-11-09 338 restorer = ksig->ka.sa.sa_restorer;
Roland McGrath 2008-01-30 339 else
Andy Lutomirski 2014-05-05 340 restorer = current->mm->context.vdso +
Andy Lutomirski 2015-10-05 341 vdso_image_32.sym___kernel_rt_sigreturn;
Al Viro 2020-02-15 342 unsafe_put_user(ptr_to_compat(restorer), &frame->pretcode, Efault);
Linus Torvalds 2005-04-16 343
Thomas Gleixner 2008-01-30 344 /*
Thomas Gleixner 2008-01-30 345 * Not actually used anymore, but left because some gdb
Thomas Gleixner 2008-01-30 346 * versions need it.
Thomas Gleixner 2008-01-30 347 */
Al Viro 2020-02-15 348 unsafe_put_user(*((u64 *)&code), (u64 __user *)frame->retcode, Efault);
Al Viro 2020-02-15 349 unsafe_put_sigcontext32(&frame->uc.uc_mcontext, fp, regs, set, Efault);
Al Viro 2020-02-15 @350 unsafe_put_user(*(__u64 *)set, (__u64 *)&frame->uc.uc_sigmask, Efault);
Corporation
list/kbuild-all@lists.01.org">https://lists.01.org/hyperkitty/list/[email protected]

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