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gpu: nvgpu: posix: fix EXP32 CERT C violation

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Do not ignore volatile attribute of addr while assigning it to p.

Error: CERT EXP32-C:
drivers/gpu/nvgpu/os/posix/bitmap.c:227:
cert_violation: Access volatile variable "addr" through
 a nonvolatile reference.

Jira NVGPU-3560

Change-Id: I202b143e1818641b12f6552810953ac447348271
Signed-off-by: Nitin Kumbhar <nkumbhar@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2122720
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>
This commit is contained in:
Nitin Kumbhar
2019-05-21 14:30:16 +05:30
committed by mobile promotions
parent 97a4a76936
commit 69331cdfb7
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/nvgpu/os/posix/bitmap.c
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@@ -216,7 +216,8 @@ bool test_and_set_bit(int nr, volatile unsigned long *addr)
bool test_and_clear_bit(int nr, volatile unsigned long *addr)
{
unsigned long mask = BIT_MASK(nr);
unsigned long *p = ((unsigned long *)addr) + BIT_WORD(nr);
volatile unsigned long *p =
((volatile unsigned long *)addr) + BIT_WORD(nr);
return (atomic_fetch_and(p, ~mask) & mask) != 0ULL;
}