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authorRusty Russell <rusty@rustcorp.com.au>2013-03-18 06:52:19 +0400
committerRusty Russell <rusty@rustcorp.com.au>2013-03-20 07:30:42 +0400
commit61d0b5a4b2777dcf5daef245e212b3c1fa8091ca (patch)
tree647f8fd729d5400341e5701d0d1eb668aad97f89 /tools/virtio/asm/barrier.h
parenta9a0fef779074838230e04a322fd2bdc921f4f4f (diff)
downloadlinux-61d0b5a4b2777dcf5daef245e212b3c1fa8091ca.tar.xz
tools/virtio: separate headers more.
This makes them a bit more like the kernel headers, so we can include more real kernel headers in our tests. In addition this means that we don't break tools/virtio with the next patch. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'tools/virtio/asm/barrier.h')
-rw-r--r--tools/virtio/asm/barrier.h14
1 files changed, 14 insertions, 0 deletions
diff --git a/tools/virtio/asm/barrier.h b/tools/virtio/asm/barrier.h
new file mode 100644
index 000000000000..aff61e13306c
--- /dev/null
+++ b/tools/virtio/asm/barrier.h
@@ -0,0 +1,14 @@
+#if defined(__i386__) || defined(__x86_64__)
+#define barrier() asm volatile("" ::: "memory")
+#define mb() __sync_synchronize()
+
+#define smp_mb() mb()
+# define smp_rmb() barrier()
+# define smp_wmb() barrier()
+/* Weak barriers should be used. If not - it's a bug */
+# define rmb() abort()
+# define wmb() abort()
+#else
+#error Please fill in barrier macros
+#endif
+