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 <[email protected]> Cc: [email protected] Cc: Huacai Chen <[email protected]> Cc: Jiaxun Yang <[email protected]> Cc: [email protected]
berg · Oct 7, 2019 · 77d281b · 77d281b
1 parent 4d1dbfe
commit 77d281b
Showing 1 changed file with 2 additions and 2 deletions.
diff --git 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;
 }