From: Mark Rutland <mark.rutland@arm.com>
Date: Thu, 24 Nov 2016 10:25:12 +0000 (+0000)
Subject: tools/virtio: fix READ_ONCE()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=5da889c795b1fbefc9d8f058b54717ab8ab17891;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

tools/virtio: fix READ_ONCE()

The virtio tools implementation of READ_ONCE() has a single parameter called
'var', but erroneously refers to 'val' for its cast, and thus won't work unless
there's a variable of the correct type that happens to be called 'var'.

Fix this with s/var/val/, making READ_ONCE() work as expected regardless.

Fixes: a7c490333df3cff5 ("tools/virtio: use virt_xxx barriers")
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: linux-kernel@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
---

diff --git a/tools/virtio/linux/compiler.h b/tools/virtio/linux/compiler.h
index 845960e1cbf2..c9ccfd42ec13 100644
--- a/tools/virtio/linux/compiler.h
+++ b/tools/virtio/linux/compiler.h
@@ -4,6 +4,6 @@
 #define WRITE_ONCE(var, val) \
 	(*((volatile typeof(val) *)(&(var))) = (val))
 
-#define READ_ONCE(var) (*((volatile typeof(val) *)(&(var))))
+#define READ_ONCE(var) (*((volatile typeof(var) *)(&(var))))
 
 #endif