Powerpc allows reordering over its ll/sc implementation. Implement the two new barriers as appropriate. Signed-off-by: Peter Zijlstra --- arch/powerpc/include/asm/atomic.h | 6 +----- arch/powerpc/include/asm/barrier.h | 3 +++ arch/powerpc/include/asm/bitops.h | 6 +----- arch/powerpc/kernel/crash.c | 2 +- 4 files changed, 6 insertions(+), 11 deletions(-) --- a/arch/powerpc/include/asm/atomic.h +++ b/arch/powerpc/include/asm/atomic.h @@ -8,6 +8,7 @@ #ifdef __KERNEL__ #include #include +#include #define ATOMIC_INIT(i) { (i) } @@ -270,11 +271,6 @@ static __inline__ int atomic_dec_if_posi } #define atomic_dec_if_positive atomic_dec_if_positive -#define smp_mb__before_atomic_dec() smp_mb() -#define smp_mb__after_atomic_dec() smp_mb() -#define smp_mb__before_atomic_inc() smp_mb() -#define smp_mb__after_atomic_inc() smp_mb() - #ifdef __powerpc64__ #define ATOMIC64_INIT(i) { (i) } --- a/arch/powerpc/include/asm/barrier.h +++ b/arch/powerpc/include/asm/barrier.h @@ -84,4 +84,7 @@ do { \ ___p1; \ }) +#define smp_mb__before_atomic() smp_mb() +#define smp_mb__after_atomic() smp_mb() + #endif /* _ASM_POWERPC_BARRIER_H */ --- a/arch/powerpc/include/asm/bitops.h +++ b/arch/powerpc/include/asm/bitops.h @@ -51,11 +51,7 @@ #define PPC_BIT(bit) (1UL << PPC_BITLSHIFT(bit)) #define PPC_BITMASK(bs, be) ((PPC_BIT(bs) - PPC_BIT(be)) | PPC_BIT(bs)) -/* - * clear_bit doesn't imply a memory barrier - */ -#define smp_mb__before_clear_bit() smp_mb() -#define smp_mb__after_clear_bit() smp_mb() +#include /* Macro for generating the ***_bits() functions */ #define DEFINE_BITOP(fn, op, prefix) \ --- a/arch/powerpc/kernel/crash.c +++ b/arch/powerpc/kernel/crash.c @@ -81,7 +81,7 @@ void crash_ipi_callback(struct pt_regs * } atomic_inc(&cpus_in_crash); - smp_mb__after_atomic_inc(); + smp_mb__after_atomic(); /* * Starting the kdump boot. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/