diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-28 00:19:27 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-09-28 00:19:27 -0400 |
| commit | 050026feae5bd4fe2db4096b63b15abce7c47faa (patch) | |
| tree | 6d826f7548e16c949b51f257f7c5d4d85318e602 /arch/x86 | |
| parent | 252a52aa4fa22a668f019e55b3aac3ff71ec1c29 (diff) | |
| parent | c9e2fbd909c20b165b2b9ffb59f8b674cf0a55b0 (diff) | |
Merge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Avoid 'constant_test_bit()' misoptimization due to cast to non-volatile
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/bitops.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/include/asm/bitops.h b/arch/x86/include/asm/bitops.h index 545776efeb16..bafd80defa43 100644 --- a/arch/x86/include/asm/bitops.h +++ b/arch/x86/include/asm/bitops.h | |||
| @@ -309,7 +309,7 @@ static inline int test_and_change_bit(int nr, volatile unsigned long *addr) | |||
| 309 | static __always_inline int constant_test_bit(unsigned int nr, const volatile unsigned long *addr) | 309 | static __always_inline int constant_test_bit(unsigned int nr, const volatile unsigned long *addr) |
| 310 | { | 310 | { |
| 311 | return ((1UL << (nr % BITS_PER_LONG)) & | 311 | return ((1UL << (nr % BITS_PER_LONG)) & |
| 312 | (((unsigned long *)addr)[nr / BITS_PER_LONG])) != 0; | 312 | (addr[nr / BITS_PER_LONG])) != 0; |
| 313 | } | 313 | } |
| 314 | 314 | ||
| 315 | static inline int variable_test_bit(int nr, volatile const unsigned long *addr) | 315 | static inline int variable_test_bit(int nr, volatile const unsigned long *addr) |