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| author | Arnd Bergmann <arnd@arndb.de> | 2019-03-06 12:05:49 +0100 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2019-03-06 11:32:37 -0500 |
| commit | cfdbb4ed31aa777d59b288810f66eb06249ee5b7 (patch) | |
| tree | e96d7bb7ea9db5f57632c7652a44b4d3250e8cba /drivers/vhost | |
| parent | ab7a2375fb8e83f8744c34442f476fa5a9df5e35 (diff) | |
| download | lwn-cfdbb4ed31aa777d59b288810f66eb06249ee5b7.tar.gz lwn-cfdbb4ed31aa777d59b288810f66eb06249ee5b7.zip | |
vhost: silence an unused-variable warning
On some architectures, the MMU can be disabled, leading to access_ok()
becoming an empty macro that does not evaluate its size argument,
which in turn produces an unused-variable warning:
drivers/vhost/vhost.c:1191:9: error: unused variable 's' [-Werror,-Wunused-variable]
size_t s = vhost_has_feature(vq, VIRTIO_RING_F_EVENT_IDX) ? 2 : 0;
Mark the variable as __maybe_unused to shut up that warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'drivers/vhost')
| -rw-r--r-- | drivers/vhost/vhost.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index a2e5dc7716e2..5ace833de746 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1188,7 +1188,7 @@ static bool vq_access_ok(struct vhost_virtqueue *vq, unsigned int num, struct vring_used __user *used) { - size_t s = vhost_has_feature(vq, VIRTIO_RING_F_EVENT_IDX) ? 2 : 0; + size_t s __maybe_unused = vhost_has_feature(vq, VIRTIO_RING_F_EVENT_IDX) ? 2 : 0; return access_ok(desc, num * sizeof *desc) && access_ok(avail, |