ChangeSet 1.1539.3.2, 2005/02/06 20:47:34-08:00, [EMAIL PROTECTED]
[SPARC64]: Add missing membars for xchg() and cmpxchg().
Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
system.h | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff -Nru a/include/asm-sparc64/system.h b/include/asm-sparc64/system.h
--- a/include/asm-sparc64/system.h 2005-02-09 09:07:12 -08:00
+++ b/include/asm-sparc64/system.h 2005-02-09 09:07:12 -08:00
@@ -246,6 +246,7 @@
extern __inline__ unsigned long xchg32(__volatile__ unsigned int *m, unsigned
int val)
{
__asm__ __volatile__(
+" membar #StoreLoad | #LoadLoad\n"
" mov %0, %%g5\n"
"1: lduw [%2], %%g7\n"
" cas [%2], %%g7, %0\n"
@@ -262,6 +263,7 @@
extern __inline__ unsigned long xchg64(__volatile__ unsigned long *m, unsigned
long val)
{
__asm__ __volatile__(
+" membar #StoreLoad | #LoadLoad\n"
" mov %0, %%g5\n"
"1: ldx [%2], %%g7\n"
" casx [%2], %%g7, %0\n"
@@ -306,7 +308,8 @@
extern __inline__ unsigned long
__cmpxchg_u32(volatile int *m, int old, int new)
{
- __asm__ __volatile__("cas [%2], %3, %0\n\t"
+ __asm__ __volatile__("membar #StoreLoad | #LoadLoad\n"
+ "cas [%2], %3, %0\n\t"
"membar #StoreLoad | #StoreStore"
: "=&r" (new)
: "0" (new), "r" (m), "r" (old)
@@ -318,7 +321,8 @@
extern __inline__ unsigned long
__cmpxchg_u64(volatile long *m, unsigned long old, unsigned long new)
{
- __asm__ __volatile__("casx [%2], %3, %0\n\t"
+ __asm__ __volatile__("membar #StoreLoad | #LoadLoad\n"
+ "casx [%2], %3, %0\n\t"
"membar #StoreLoad | #StoreStore"
: "=&r" (new)
: "0" (new), "r" (m), "r" (old)
-
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