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 mips.
Signed-off-by: Nick Piggin <[EMAIL PROTECTED]>
---
include/asm-mips/bitops.h | 6 ++++++
1 file changed, 6 insertions(+)
Index: linux-2.6/include/asm-mips/bitops.h
===================================================================
--- linux-2.6.orig/include/asm-mips/bitops.h
+++ linux-2.6/include/asm-mips/bitops.h
@@ -240,6 +240,8 @@ static inline int test_and_set_bit(unsig
unsigned short bit = nr & SZLONG_MASK;
unsigned long res;
+ smp_llsc_mb();
+
if (cpu_has_llsc && R10000_LLSC_WAR) {
unsigned long *m = ((unsigned long *) addr) + (nr >>
SZLONG_LOG);
unsigned long temp;
@@ -308,6 +310,8 @@ static inline int test_and_clear_bit(uns
unsigned short bit = nr & SZLONG_MASK;
unsigned long res;
+ smp_llsc_mb();
+
if (cpu_has_llsc && R10000_LLSC_WAR) {
unsigned long *m = ((unsigned long *) addr) + (nr >>
SZLONG_LOG);
unsigned long temp;
@@ -396,6 +400,8 @@ static inline int test_and_change_bit(un
unsigned short bit = nr & SZLONG_MASK;
unsigned long res;
+ smp_llsc_mb();
+
if (cpu_has_llsc && R10000_LLSC_WAR) {
unsigned long *m = ((unsigned long *) addr) + (nr >>
SZLONG_LOG);
unsigned long temp;
-
To unsubscribe from this list: send the line "unsubscribe linux-arch" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
