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authorNick Piggin <npiggin@suse.de>2007-10-18 03:06:50 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-18 14:37:29 -0700
commit7c29ca5b8d13287ed67d2863f4c5f7bfc1a15279 (patch)
treee6745adc937d6f0afe56c394ce5830128ad3c88c /include/asm-alpha
parent26333576fd0d0b52f6e4025c5aded97e188bdd44 (diff)
downloadlinux-7c29ca5b8d13287ed67d2863f4c5f7bfc1a15279.tar.bz2
alpha: fix bitops
Documentation/atomic_ops.txt defines these primitives must contain a memory barrier both before and after their memory operation. This is consistent with the atomic ops implementation on alpha. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/asm-alpha')
-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"