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mips: fix bitops

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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 <npiggin@suse.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Nick Piggin 2007-10-18 03:06:52 -07:00 committed by Linus Torvalds
parent 87371e4fa4
commit c8f30ae547
1 changed files with 6 additions and 0 deletions
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6
include/asm-mips/bitops.h
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@ -240,6 +240,8 @@ static inline int test_and_set_bit(unsigned long nr,
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(unsigned long nr,
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(unsigned long nr,
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;