diff options
| -rw-r--r-- | arch/mips/include/asm/cmpxchg.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/arch/mips/include/asm/cmpxchg.h b/arch/mips/include/asm/cmpxchg.h index f345a873742d..59cf5cbb3883 100644 --- a/arch/mips/include/asm/cmpxchg.h +++ b/arch/mips/include/asm/cmpxchg.h @@ -290,10 +290,13 @@ static inline unsigned long __cmpxchg64(volatile void *ptr, * will cause a build error unless cpu_has_64bits is a \ * compile-time constant 1. \ */ \ - if (cpu_has_64bits && kernel_uses_llsc) \ + if (cpu_has_64bits && kernel_uses_llsc) { \ + smp_mb__before_llsc(); \ __res = __cmpxchg64((ptr), __old, __new); \ - else \ + smp_llsc_mb(); \ + } else { \ __res = __cmpxchg64_unsupported(); \ + } \ \ __res; \ }) |