fc_mount() already handles the vfs_get_tree(), sb->s_umount
unlocking and vfs_create_mount() sequence. Using it greatly
simplifies fuse_dentry_automount().
Signed-off-by: NGreg Kurz <groug@kaod.org>
Reviewed-by: NMax Reitz <mreitz@redhat.com>
Signed-off-by: NMiklos Szeredi <mszeredi@redhat.com>