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authorPaul Burton <paul.burton@mips.com>2019-10-01 21:53:21 +0000
committerPaul Burton <paul.burton@mips.com>2019-10-07 09:42:32 -0700
commit77d281b7966e476927a45c5fb272d720aa75bb95 (patch)
tree0b2c440703c058cc6fe3e41923a9a9318a86d5e3 /arch/mips/include/asm/atomic.h
parent4d1dbfe6cbec34c6398a480c0572bba794e89e11 (diff)
MIPS: atomic: Use _atomic barriers in atomic_sub_if_positive()
Use smp_mb__before_atomic() & smp_mb__after_atomic() in atomic_sub_if_positive() rather than the equivalent smp_mb__before_llsc() & smp_llsc_mb(). The former are more standard & this preps us for avoiding redundant duplicate barriers on Loongson3 in a later patch. 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/asm/atomic.h')
-rw-r--r--arch/mips/include/asm/atomic.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/include/asm/atomic.h b/arch/mips/include/asm/atomic.h
index 841ff274ada6..24443ef29337 100644
--- a/arch/mips/include/asm/atomic.h
+++ b/arch/mips/include/asm/atomic.h
@@ -196,7 +196,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
{
int result;
- smp_mb__before_llsc();
+ smp_mb__before_atomic();
if (kernel_uses_llsc) {
int temp;
@@ -237,7 +237,7 @@ static __inline__ int atomic_sub_if_positive(int i, atomic_t * v)
* another barrier here.
*/
if (!__SYNC_loongson3_war)
- smp_llsc_mb();
+ smp_mb__after_atomic();
return result;
}