From 9c57b5808c625f4fc93da330b932647eaff321f7 Mon Sep 17 00:00:00 2001 From: Yisheng Xie Date: Fri, 24 Feb 2017 15:00:40 -0800 Subject: mm balloon: umount balloon_mnt when removing vb device With CONFIG_BALLOON_COMPACTION=y the kernel will mount balloon_mnt for balloon page migration when we probe a virtio_balloon device. However we do not unmount it when removing the device. Fix this. Fixes: b1123ea6d3b3 ("mm: balloon: use general non-lru movable page feature") Link: http://lkml.kernel.org/r/1486531318-35189-1-git-send-email-xieyisheng1@huawei.com Signed-off-by: Yisheng Xie Acked-by: Minchan Kim Cc: Rafael Aquini Cc: Konstantin Khlebnikov Cc: Gioh Kim Cc: Vlastimil Babka Cc: Michal Hocko Cc: Michael S. Tsirkin Cc: Jason Wang Cc: Hanjun Guo Cc: Xishi Qiu Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/virtio/virtio_balloon.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/virtio') diff --git a/drivers/virtio/virtio_balloon.c b/drivers/virtio/virtio_balloon.c index 181793f07852..9d2738e9217f 100644 --- a/drivers/virtio/virtio_balloon.c +++ b/drivers/virtio/virtio_balloon.c @@ -615,8 +615,12 @@ static void virtballoon_remove(struct virtio_device *vdev) cancel_work_sync(&vb->update_balloon_stats_work); remove_common(vb); +#ifdef CONFIG_BALLOON_COMPACTION if (vb->vb_dev_info.inode) iput(vb->vb_dev_info.inode); + + kern_unmount(balloon_mnt); +#endif kfree(vb); } -- cgit v1.2.3-59-g8ed1b