diff options
| author | Nick Piggin <npiggin@suse.de> | 2007-10-18 03:06:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-18 14:37:29 -0700 |
| commit | c8f30ae54714abf494d79826d90b5e4844fbf355 (patch) | |
| tree | 180bef314aa7cde94b1ff1cb6ca72bea61125e60 /include | |
| parent | 87371e4fa4901d84ce83356b909b83f31f40758f (diff) | |
mips: fix bitops
Documentation/atomic_ops.txt defines these primitives must contain a memory
barrier both before and after their memory operation. This is consistent with
the atomic ops implementation on mips.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-mips/bitops.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/include/asm-mips/bitops.h b/include/asm-mips/bitops.h index 0d3373f6492..5478d947e28 100644 --- a/include/asm-mips/bitops.h +++ b/include/asm-mips/bitops.h @@ -240,6 +240,8 @@ static inline int test_and_set_bit(unsigned long nr, unsigned short bit = nr & SZLONG_MASK; unsigned long res; + smp_llsc_mb(); + if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); unsigned long temp; @@ -308,6 +310,8 @@ static inline int test_and_clear_bit(unsigned long nr, unsigned short bit = nr & SZLONG_MASK; unsigned long res; + smp_llsc_mb(); + if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); unsigned long temp; @@ -396,6 +400,8 @@ static inline int test_and_change_bit(unsigned long nr, unsigned short bit = nr & SZLONG_MASK; unsigned long res; + smp_llsc_mb(); + if (cpu_has_llsc && R10000_LLSC_WAR) { unsigned long *m = ((unsigned long *) addr) + (nr >> SZLONG_LOG); unsigned long temp; |