aboutsummaryrefslogtreecommitdiff
path: root/qemu-barrier.h
diff options
context:
space:
mode:
authorJan Kiszka <jan.kiszka@siemens.com>2010-06-25 16:56:49 +0200
committerAurelien Jarno <aurelien@aurel32.net>2010-07-22 05:52:08 +0200
commit1d93f0f03d4d911fdf1dc4ef529d8b2a0c0765f2 (patch)
tree843739dbf41d3162ea8c25d8603d6797c0a7ac9c /qemu-barrier.h
parent1e29a009e35f2184236d09f45e58bc6a954074c6 (diff)
Introduce proper compiler barrier
Define barrier() as optimization barrier and replace (potentially unreliable) asm("") fences. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'qemu-barrier.h')
-rw-r--r--qemu-barrier.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/qemu-barrier.h b/qemu-barrier.h
index 3bd1075d66..b77fce23a9 100644
--- a/qemu-barrier.h
+++ b/qemu-barrier.h
@@ -4,4 +4,7 @@
/* FIXME: arch dependant, x86 version */
#define smp_wmb() asm volatile("" ::: "memory")
+/* Compiler barrier */
+#define barrier() asm volatile("" ::: "memory")
+
#endif