[Qemu-devel] [RFC PATCH 01/13] add smp_mb()

[Paolo Bonzini]

We'll need a full memory barrier, and __sync_synchronize() is
just too ugly to type.

Signed-off-by: Paolo Bonzini <address@hidden>
---
 qemu-barrier.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/qemu-barrier.h b/qemu-barrier.h
index b77fce2..7bd5268 100644
--- a/qemu-barrier.h
+++ b/qemu-barrier.h
@@ -4,6 +4,8 @@
 /* FIXME: arch dependant, x86 version */
 #define smp_wmb()   asm volatile("" ::: "memory")
 
+#define smp_mb()    __sync_synchronize()
+
 /* Compiler barrier */
 #define barrier()   asm volatile("" ::: "memory")
 
-- 
1.7.6