Building the current 5.8 kernel for a e500 machine with
CONFIG_RANDOMIZE_BASE set yields the following failure:
arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit declaration
of function 'flush_icache_range'; did you mean 'flush_tlb_range'?
[-Werror=implicit-function-declaration]
Indeed, including asm/cacheflush.h into kaslr_booke.c fixes the build.
The issue dates back to the introduction of that file and probably went
unnoticed because there's no in-tree defconfig with CONFIG_RANDOMIZE_BASE
set.
Fixes: 2b0e86cc5de6 ("powerpc/fsl_booke/32: implement KASLR infrastructure")
Cc: [email protected]
Signed-off-by: Arseny Solokha <[email protected]>
---
arch/powerpc/mm/nohash/kaslr_booke.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
index 4a75f2d9bf0e..bce0e5349978 100644
--- a/arch/powerpc/mm/nohash/kaslr_booke.c
+++ b/arch/powerpc/mm/nohash/kaslr_booke.c
@@ -14,6 +14,7 @@
#include <linux/memblock.h>
#include <linux/libfdt.h>
#include <linux/crash_core.h>
+#include <asm/cacheflush.h>
#include <asm/pgalloc.h>
#include <asm/prom.h>
#include <asm/kdump.h>
--
2.27.0
Le 13/06/2020 à 18:28, Arseny Solokha a écrit :
> Building the current 5.8 kernel for a e500 machine with
> CONFIG_RANDOMIZE_BASE set yields the following failure:
>
> arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
> arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit declaration
> of function 'flush_icache_range'; did you mean 'flush_tlb_range'?
> [-Werror=implicit-function-declaration]
>
> Indeed, including asm/cacheflush.h into kaslr_booke.c fixes the build.
>
> The issue dates back to the introduction of that file and probably went
> unnoticed because there's no in-tree defconfig with CONFIG_RANDOMIZE_BASE
> set.
I don't get this problem with mpc85xx_defconfig + RELOCATABLE +
RANDOMIZE_BASE.
Christophe
>
> Fixes: 2b0e86cc5de6 ("powerpc/fsl_booke/32: implement KASLR infrastructure")
> Cc: [email protected]
> Signed-off-by: Arseny Solokha <[email protected]>
> ---
> arch/powerpc/mm/nohash/kaslr_booke.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
> index 4a75f2d9bf0e..bce0e5349978 100644
> --- a/arch/powerpc/mm/nohash/kaslr_booke.c
> +++ b/arch/powerpc/mm/nohash/kaslr_booke.c
> @@ -14,6 +14,7 @@
> #include <linux/memblock.h>
> #include <linux/libfdt.h>
> #include <linux/crash_core.h>
> +#include <asm/cacheflush.h>
> #include <asm/pgalloc.h>
> #include <asm/prom.h>
> #include <asm/kdump.h>
>
> Le 13/06/2020 à 18:28, Arseny Solokha a écrit :
>> Building the current 5.8 kernel for a e500 machine with
>> CONFIG_RANDOMIZE_BASE set yields the following failure:
>>
>> arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
>> arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit declaration
>> of function 'flush_icache_range'; did you mean 'flush_tlb_range'?
>> [-Werror=implicit-function-declaration]
>>
>> Indeed, including asm/cacheflush.h into kaslr_booke.c fixes the build.
>>
>> The issue dates back to the introduction of that file and probably went
>> unnoticed because there's no in-tree defconfig with CONFIG_RANDOMIZE_BASE
>> set.
>
> I don't get this problem with mpc85xx_defconfig + RELOCATABLE +
> RANDOMIZE_BASE.
Ah, OK. So the critical difference between mpc85xx_defconfig and our custom
config is that the former sets CONFIG_BLOCK while ours doesn't. Then we have the
following dependence chain:
arch/powerpc/mm/nohash/kaslr_booke.c
include/linux/swap.h
include/linux/memcontrol.h
include/linux/writeback.h
include/linux/blk-cgroup.h
include/linux/blkdev.h
#ifdef CONFIG_BLOCK
#include <linux/pagemap.h>
#endif
include/linux/pagemap.h
include/linux/highmem.h
arch/powerpc/include/asm/cacheflush.h
and that's how the latter doesn't get included in
arch/powerpc/mm/nohash/kaslr_booke.c, because in our config CONFIG_BLOCK is not
defined in the first place.
Arseny
> Christophe
>
>>
>> Fixes: 2b0e86cc5de6 ("powerpc/fsl_booke/32: implement KASLR infrastructure")
>> Cc: [email protected]
>> Signed-off-by: Arseny Solokha <[email protected]>
>> ---
>> arch/powerpc/mm/nohash/kaslr_booke.c | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> diff --git a/arch/powerpc/mm/nohash/kaslr_booke.c b/arch/powerpc/mm/nohash/kaslr_booke.c
>> index 4a75f2d9bf0e..bce0e5349978 100644
>> --- a/arch/powerpc/mm/nohash/kaslr_booke.c
>> +++ b/arch/powerpc/mm/nohash/kaslr_booke.c
>> @@ -14,6 +14,7 @@
>> #include <linux/memblock.h>
>> #include <linux/libfdt.h>
>> #include <linux/crash_core.h>
>> +#include <asm/cacheflush.h>
>> #include <asm/pgalloc.h>
>> #include <asm/prom.h>
>> #include <asm/kdump.h>
>>
?? 2020/6/14 0:28, Arseny Solokha д??:
> Building the current 5.8 kernel for a e500 machine with
> CONFIG_RANDOMIZE_BASE set yields the following failure:
>
> arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
> arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit declaration
> of function 'flush_icache_range'; did you mean 'flush_tlb_range'?
> [-Werror=implicit-function-declaration]
>
> Indeed, including asm/cacheflush.h into kaslr_booke.c fixes the build.
>
> The issue dates back to the introduction of that file and probably went
> unnoticed because there's no in-tree defconfig with CONFIG_RANDOMIZE_BASE
> set.
>
> Fixes: 2b0e86cc5de6 ("powerpc/fsl_booke/32: implement KASLR infrastructure")
> Cc: [email protected]
> Signed-off-by: Arseny Solokha <[email protected]>
> ---
> arch/powerpc/mm/nohash/kaslr_booke.c | 1 +
> 1 file changed, 1 insertion(+)
>
Reviewed-by: Jason Yan <[email protected]>
On Sat, 2020-06-13 at 23:28 +0700, Arseny Solokha wrote:
> Building the current 5.8 kernel for a e500 machine with
> CONFIG_RANDOMIZE_BASE set yields the following failure:
>
> arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
> arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit declaration
> of function 'flush_icache_range'; did you mean 'flush_tlb_range'?
> [-Werror=implicit-function-declaration]
>
> Indeed, including asm/cacheflush.h into kaslr_booke.c fixes the build.
>
> The issue dates back to the introduction of that file and probably went
> unnoticed because there's no in-tree defconfig with CONFIG_RANDOMIZE_BASE
> set.
>
> Fixes: 2b0e86cc5de6 ("powerpc/fsl_booke/32: implement KASLR infrastructure")
> Cc: [email protected]
> Signed-off-by: Arseny Solokha <[email protected]>
> ---
> arch/powerpc/mm/nohash/kaslr_booke.c | 1 +
> 1 file changed, 1 insertion(+)
Acked-by: Scott Wood <[email protected]>
-Scott
On Sat, 13 Jun 2020 23:28:01 +0700, Arseny Solokha wrote:
> Building the current 5.8 kernel for a e500 machine with
> CONFIG_RANDOMIZE_BASE set yields the following failure:
>
> arch/powerpc/mm/nohash/kaslr_booke.c: In function 'kaslr_early_init':
> arch/powerpc/mm/nohash/kaslr_booke.c:387:2: error: implicit declaration
> of function 'flush_icache_range'; did you mean 'flush_tlb_range'?
> [-Werror=implicit-function-declaration]
>
> [...]
Applied to powerpc/fixes.
[1/1] powerpc/fsl_booke/32: Fix build with CONFIG_RANDOMIZE_BASE
https://git.kernel.org/powerpc/c/7e4773f73dcfb92e7e33532162f722ec291e75a4
cheers