virtio: add unlikely() to WARN_ON_ONCE()

The condition to test is unlikely() to be true. Add the hint. Signed-off-by: Igor Stoppa <[email protected]> Cc: "Michael S. Tsirkin" <[email protected]> Cc: Jason Wang <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: Michael S. Tsirkin <[email protected]>
vieko · May 27, 2019 · 3d840e0 · 3d840e0
1 parent cd6c84d
commit 3d840e0
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/tools/virtio/linux/kernel.h b/tools/virtio/linux/kernel.h
@@ -127,7 +127,7 @@ static inline void free_page(unsigned long addr)
 #define dev_err(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 #define dev_warn(dev, format, ...) fprintf (stderr, format, ## __VA_ARGS__)
 
-#define WARN_ON_ONCE(cond) ((cond) ? fprintf (stderr, "WARNING\n") : 0)
+#define WARN_ON_ONCE(cond) (unlikely(cond) ? fprintf (stderr, "WARNING\n") : 0)
 
 #define min(x, y) ({				\
 	typeof(x) _min1 = (x);			\