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vfio: get rid of open-coding kref_put_mutex 

Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-08-17 21:27:32 -04:00
parent 8ad5db8a8d
commit 6d2cd3ce81
1 changed files with 2 additions and 7 deletions
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9
drivers/vfio/vfio.c
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@ -264,6 +264,7 @@ static struct vfio_group *vfio_create_group(struct iommu_group *iommu_group)
return group;
}
/* called with vfio.group_lock held */
static void vfio_group_release(struct kref *kref)
{
struct vfio_group *group = container_of(kref, struct vfio_group, kref);
@ -287,13 +288,7 @@ static void vfio_group_release(struct kref *kref)
static void vfio_group_put(struct vfio_group *group)
{
mutex_lock(&vfio.group_lock);
/*
* Release needs to unlock to unregister the notifier, so only
* unlock if not released.
*/
if (!kref_put(&group->kref, vfio_group_release))
mutex_unlock(&vfio.group_lock);
kref_put_mutex(&group->kref, vfio_group_release, &vfio.group_lock);
}
/* Assume group_lock or group reference is held */