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virtio-net: mark PM functions as __maybe_unused 

After removing the reset function, the freeze and restore functions
are now unused when CONFIG_PM_SLEEP is disabled:

drivers/net/virtio_net.c:1881:12: error: 'virtnet_restore_up' defined but not used [-Werror=unused-function]
 static int virtnet_restore_up(struct virtio_device *vdev)
drivers/net/virtio_net.c:1859:13: error: 'virtnet_freeze_down' defined but not used [-Werror=unused-function]
 static void virtnet_freeze_down(struct virtio_device *vdev)

A more robust way to do this is to remove the #ifdef around the callers
and instead mark them as __maybe_unused. The compiler will now just
silently drop the unused code.

Fixes: 4941d472bf ("virtio-net: do not reset during XDP set")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arnd Bergmann 2017-07-25 17:35:50 +02:00 committed by David S. Miller
parent 34c8c10a76
commit 67a75194bc
1 changed files with 2 additions and 4 deletions
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6
drivers/net/virtio_net.c
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@ -2702,8 +2702,7 @@ static void virtnet_remove(struct virtio_device *vdev)
free_netdev(vi->dev);
}
#ifdef CONFIG_PM_SLEEP
static int virtnet_freeze(struct virtio_device *vdev)
static __maybe_unused int virtnet_freeze(struct virtio_device *vdev)
{
struct virtnet_info *vi = vdev->priv;
@ -2714,7 +2713,7 @@ static int virtnet_freeze(struct virtio_device *vdev)
return 0;
}
static int virtnet_restore(struct virtio_device *vdev)
static __maybe_unused int virtnet_restore(struct virtio_device *vdev)
{
struct virtnet_info *vi = vdev->priv;
int err;
@ -2730,7 +2729,6 @@ static int virtnet_restore(struct virtio_device *vdev)
return 0;
}
#endif
static struct virtio_device_id id_table[] = {
{ VIRTIO_ID_NET, VIRTIO_DEV_ANY_ID },