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yaml --- r: 147977 b: refs/heads/master c: f7027c6 h: refs/heads/master i: 147975: 98c4ea2 v: v3
git-mirror · Jun 12, 2009 · 67bf522 · 67bf522
1 parent c835a76
commit 67bf522
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Showing 2 changed files with 5 additions and 4 deletions.
diff --git a/[refs] b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 1028375e93a7aa4dbe466947d1c65f368b1f61c1
+refs/heads/master: f7027c6387d0c3acf569845165ec7947e2083c82
diff --git a/trunk/Documentation/lguest/lguest.c b/trunk/Documentation/lguest/lguest.c
@@ -182,9 +182,10 @@ struct virtqueue
 /* Remember the arguments to the program so we can "reboot" */
 static char **main_args;
 
-/* Since guest is UP and we don't run at the same time, we don't need barriers.
- * But I include them in the code in case others copy it. */
-#define wmb()
+/* We have to be careful with barriers: our devices are all run in separate
+ * threads and so we need to make sure that changes visible to the Guest happen
+ * in precise order. */
+#define wmb() __asm__ __volatile__("" : : : "memory")
 
 /* Convert an iovec element to the given type.
  *