1 files changed, 4 insertions, 0 deletions

diff --git a/arch/mips/include/asm/system.h b/arch/mips/include/asm/system.h
index 83b5509e09e8..bb937ccfba1e 100644
--- a/arch/mips/include/asm/system.h
+++ b/arch/mips/include/asm/system.h
@@ -95,6 +95,8 @@ static inline unsigned long __xchg_u32(volatile int * m, unsigned int val)
 {
         __u32 retval;
 
+        smp_mb__before_llsc();
+
         if (kernel_uses_llsc && R10000_LLSC_WAR) {
                 unsigned long dummy;
 
@@ -147,6 +149,8 @@ static inline __u64 __xchg_u64(volatile __u64 * m, __u64 val)
 {
         __u64 retval;
 
+        smp_mb__before_llsc();
+
         if (kernel_uses_llsc && R10000_LLSC_WAR) {
                 unsigned long dummy;