summaryrefslogtreecommitdiff
path: root/arch/powerpc/include/asm/barrier.h
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/include/asm/barrier.h')
-rw-r--r--arch/powerpc/include/asm/barrier.h19
1 files changed, 11 insertions, 8 deletions
diff --git a/arch/powerpc/include/asm/barrier.h b/arch/powerpc/include/asm/barrier.h
index bab79a110c7b..a3bf5be111ff 100644
--- a/arch/powerpc/include/asm/barrier.h
+++ b/arch/powerpc/include/asm/barrier.h
@@ -33,12 +33,9 @@
#define mb() __asm__ __volatile__ ("sync" : : : "memory")
#define rmb() __asm__ __volatile__ ("sync" : : : "memory")
#define wmb() __asm__ __volatile__ ("sync" : : : "memory")
-#define read_barrier_depends() do { } while(0)
#define set_mb(var, value) do { var = value; mb(); } while (0)
-#ifdef CONFIG_SMP
-
#ifdef __SUBARCH_HAS_LWSYNC
# define SMPWMB LWSYNC
#else
@@ -46,20 +43,26 @@
#endif
#define __lwsync() __asm__ __volatile__ (stringify_in_c(LWSYNC) : : :"memory")
+#define dma_rmb() __lwsync()
+#define dma_wmb() __asm__ __volatile__ (stringify_in_c(SMPWMB) : : :"memory")
+
+#ifdef CONFIG_SMP
+#define smp_lwsync() __lwsync()
#define smp_mb() mb()
#define smp_rmb() __lwsync()
#define smp_wmb() __asm__ __volatile__ (stringify_in_c(SMPWMB) : : :"memory")
-#define smp_read_barrier_depends() read_barrier_depends()
#else
-#define __lwsync() barrier()
+#define smp_lwsync() barrier()
#define smp_mb() barrier()
#define smp_rmb() barrier()
#define smp_wmb() barrier()
-#define smp_read_barrier_depends() do { } while(0)
#endif /* CONFIG_SMP */
+#define read_barrier_depends() do { } while (0)
+#define smp_read_barrier_depends() do { } while (0)
+
/*
* This is a barrier which prevents following instructions from being
* started until the value of the argument x is known. For example, if
@@ -72,7 +75,7 @@
#define smp_store_release(p, v) \
do { \
compiletime_assert_atomic_type(*p); \
- __lwsync(); \
+ smp_lwsync(); \
ACCESS_ONCE(*p) = (v); \
} while (0)
@@ -80,7 +83,7 @@ do { \
({ \
typeof(*p) ___p1 = ACCESS_ONCE(*p); \
compiletime_assert_atomic_type(*p); \
- __lwsync(); \
+ smp_lwsync(); \
___p1; \
})