diff options
| author | Paul Burton <paul.burton@mips.com> | 2019-10-01 21:53:36 +0000 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2019-10-07 09:42:58 -0700 |
| commit | 9026737703aeee35702a0f990811e9202469c7b4 (patch) | |
| tree | d1a7e76850353be17193a10eb6e8bcef2f52e5ed /arch/mips/include | |
| parent | 5bb29275df7a7aab8b6c29686109cc5cb1015850 (diff) | |
| download | linux-9026737703aeee35702a0f990811e9202469c7b4.tar.bz2 | |
MIPS: bitops: Use smp_mb__before_atomic in test_* ops
Use smp_mb__before_atomic() rather than smp_mb__before_llsc() in
test_and_set_bit(), test_and_clear_bit() & test_and_change_bit(). The
_atomic() versions make semantic sense in these cases, and will allow a
later patch to omit redundant barriers for Loongson3 systems that
already include a barrier within __test_bit_op().
Signed-off-by: Paul Burton <paul.burton@mips.com>
Cc: linux-mips@vger.kernel.org
Cc: Huacai Chen <chenhc@lemote.com>
Cc: Jiaxun Yang <jiaxun.yang@flygoat.com>
Cc: linux-kernel@vger.kernel.org
Diffstat (limited to 'arch/mips/include')
| -rw-r--r-- | arch/mips/include/asm/bitops.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/mips/include/asm/bitops.h b/arch/mips/include/asm/bitops.h index c08b6d225f10..a74769940fbd 100644 --- a/arch/mips/include/asm/bitops.h +++ b/arch/mips/include/asm/bitops.h @@ -209,7 +209,7 @@ static inline int test_and_set_bit_lock(unsigned long nr, static inline int test_and_set_bit(unsigned long nr, volatile unsigned long *addr) { - smp_mb__before_llsc(); + smp_mb__before_atomic(); return test_and_set_bit_lock(nr, addr); } @@ -228,7 +228,7 @@ static inline int test_and_clear_bit(unsigned long nr, int bit = nr % BITS_PER_LONG; unsigned long res, orig; - smp_mb__before_llsc(); + smp_mb__before_atomic(); if (!kernel_uses_llsc) { res = __mips_test_and_clear_bit(nr, addr); @@ -265,7 +265,7 @@ static inline int test_and_change_bit(unsigned long nr, int bit = nr % BITS_PER_LONG; unsigned long res, orig; - smp_mb__before_llsc(); + smp_mb__before_atomic(); if (!kernel_uses_llsc) { res = __mips_test_and_change_bit(nr, addr); |