From af9b9c8bfeee83823852817724b4664254749180 Mon Sep 17 00:00:00 2001 From: Anand Jain Date: Thu, 16 Dec 2021 21:04:13 +0800 Subject: [PATCH] btrfs: remove stale comment about the btrfs_show_devname Commit cdccc03a8a369b59cff5e7ea3292511cfa551120 upstream. There were few lockdep warnings because btrfs_show_devname() was using device_list_mutex as recorded in the commits: 0ccd05285e7f ("btrfs: fix a possible umount deadlock") 779bf3fefa83 ("btrfs: fix lock dep warning, move scratch dev out of device_list_mutex and uuid_mutex") And finally, commit 88c14590cdd6 ("btrfs: use RCU in btrfs_show_devname for device list traversal") removed the device_list_mutex from btrfs_show_devname for performance reasons. This patch removes a stale comment about the function btrfs_show_devname and device_list_mutex. Signed-off-by: Anand Jain Reviewed-by: David Sterba Signed-off-by: David Sterba Signed-off-by: Anand Jain Signed-off-by: Greg Kroah-Hartman --- fs/btrfs/volumes.c | 7 ------- 1 file changed, 7 deletions(-) diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index 4aed2df..13fdc06 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -2312,13 +2312,6 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev) mutex_unlock(&fs_devices->device_list_mutex); - /* - * The update_dev_time() with in btrfs_scratch_superblocks() - * may lead to a call to btrfs_show_devname() which will try - * to hold device_list_mutex. And here this device - * is already out of device list, so we don't have to hold - * the device_list_mutex lock. - */ btrfs_scratch_superblocks(tgtdev->fs_info, tgtdev->bdev, tgtdev->name->str); -- 2.7.4