Merge branch 'master'

1 files changed, 10 insertions, 4 deletions

diff --git a/include/asm-alpha/atomic.h b/include/asm-alpha/atomic.h
index 1b383e3cb68c..20ac3d95ecd9 100644
--- a/include/asm-alpha/atomic.h
+++ b/include/asm-alpha/atomic.h
@@ -1,6 +1,8 @@
 #ifndef _ALPHA_ATOMIC_H
 #define _ALPHA_ATOMIC_H
 
+#include <asm/barrier.h>
+
 /*
  * Atomic operations that C can't guarantee us.  Useful for
  * resource counting etc...
@@ -100,18 +102,19 @@ static __inline__ void atomic64_sub(long i, atomic64_t * v)
 static __inline__ long atomic_add_return(int i, atomic_t * v)
 {
         long temp, result;
+        smp_mb();
         __asm__ __volatile__(
         "1:     ldl_l %0,%1\n"
         "       addl %0,%3,%2\n"
         "       addl %0,%3,%0\n"
         "       stl_c %0,%1\n"
         "       beq %0,2f\n"
-        "       mb\n"
         ".subsection 2\n"
         "2:     br 1b\n"
         ".previous"
         :"=&r" (temp), "=m" (v->counter), "=&r" (result)
         :"Ir" (i), "m" (v->counter) : "memory");
+        smp_mb();
         return result;
 }
 
@@ -120,54 +123,57 @@ static __inline__ long atomic_add_return(int i, atomic_t * v)
 static __inline__ long atomic64_add_return(long i, atomic64_t * v)
 {
         long temp, result;
+        smp_mb();
         __asm__ __volatile__(
         "1:     ldq_l %0,%1\n"
         "       addq %0,%3,%2\n"
         "       addq %0,%3,%0\n"
         "       stq_c %0,%1\n"
         "       beq %0,2f\n"
-        "       mb\n"
         ".subsection 2\n"
         "2:     br 1b\n"
         ".previous"
         :"=&r" (temp), "=m" (v->counter), "=&r" (result)
         :"Ir" (i), "m" (v->counter) : "memory");
+        smp_mb();
         return result;
 }
 
 static __inline__ long atomic_sub_return(int i, atomic_t * v)
 {
         long temp, result;
+        smp_mb();
         __asm__ __volatile__(
         "1:     ldl_l %0,%1\n"
         "       subl %0,%3,%2\n"
         "       subl %0,%3,%0\n"
         "       stl_c %0,%1\n"
         "       beq %0,2f\n"
-        "       mb\n"
         ".subsection 2\n"
         "2:     br 1b\n"
         ".previous"
         :"=&r" (temp), "=m" (v->counter), "=&r" (result)
         :"Ir" (i), "m" (v->counter) : "memory");
+        smp_mb();
         return result;
 }
 
 static __inline__ long atomic64_sub_return(long i, atomic64_t * v)
 {
         long temp, result;
+        smp_mb();
         __asm__ __volatile__(
         "1:     ldq_l %0,%1\n"
         "       subq %0,%3,%2\n"
         "       subq %0,%3,%0\n"
         "       stq_c %0,%1\n"
         "       beq %0,2f\n"
-        "       mb\n"
         ".subsection 2\n"
         "2:     br 1b\n"
         ".previous"
         :"=&r" (temp), "=m" (v->counter), "=&r" (result)
         :"Ir" (i), "m" (v->counter) : "memory");
+        smp_mb();
         return result;
 }