From 3d840e0636be64502f1d3da2e077dab390c04091 Mon Sep 17 00:00:00 2001
From: Igor Stoppa <igor.stoppa@gmail.com>
Date: Fri, 7 Sep 2018 20:48:02 +0300
Subject: [PATCH] virtio: add unlikely() to WARN_ON_ONCE()
The condition to test is unlikely() to be true. Add the hint.
Signed-off-by: Igor Stoppa <igor.stoppa@huawei.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Virtualization@lists.linux-foundation.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---
tools/virtio/linux/kernel.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/virtio/linux/kernel.h b/tools/virtio/linux/kernel.h
index 7ef45a4a3cba7..6683b4a70b059 100644
--- 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); \
--
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