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-rw-r--r--include/asm-alpha/bitops.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/asm-alpha/bitops.h b/include/asm-alpha/bitops.h
index ca667d121898..f1bbe6cf0e84 100644
--- a/include/asm-alpha/bitops.h
+++ b/include/asm-alpha/bitops.h
@@ -117,6 +117,9 @@ test_and_set_bit(unsigned long nr, volatile void *addr)
int *m = ((int *) addr) + (nr >> 5);
__asm__ __volatile__(
+#ifdef CONFIG_SMP
+ " mb\n"
+#endif
"1: ldl_l %0,%4\n"
" and %0,%3,%2\n"
" bne %2,2f\n"
@@ -158,6 +161,9 @@ test_and_clear_bit(unsigned long nr, volatile void * addr)
int *m = ((int *) addr) + (nr >> 5);
__asm__ __volatile__(
+#ifdef CONFIG_SMP
+ " mb\n"
+#endif
"1: ldl_l %0,%4\n"
" and %0,%3,%2\n"
" beq %2,2f\n"
@@ -199,6 +205,9 @@ test_and_change_bit(unsigned long nr, volatile void * addr)
int *m = ((int *) addr) + (nr >> 5);
__asm__ __volatile__(
+#ifdef CONFIG_SMP
+ " mb\n"
+#endif
"1: ldl_l %0,%4\n"
" and %0,%3,%2\n"
" xor %0,%3,%0\n"