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Commit ab5c2f65 authored by Anand Jain's avatar Anand Jain Committed by David Sterba
Browse files

btrfs: drop uuid_mutex in btrfs_destroy_dev_replace_tgtdev 



Delete the uuid_mutex lock here as this thread accesses the
btrfs_fs_devices::devices only (counters or called functions do a list
traversal). And the device_list_mutex lock is already taken.

Signed-off-by: default avatarAnand Jain <anand.jain@oracle.com>
Reviewed-by: default avatarDavid Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: default avatarDavid Sterba <dsterba@suse.com>
parent b25e59e2

fs/btrfs/volumes.c

+0 −2
Original line number Diff line number Diff line
@@ -2152,7 +2152,6 @@ void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info, 
void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,

				      struct btrfs_device *tgtdev)

{

	mutex_lock(&uuid_mutex);

	WARN_ON(!tgtdev);

	mutex_lock(&fs_info->fs_devices->device_list_mutex);
@@ -2168,7 +2167,6 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info, 
	list_del_rcu(&tgtdev->dev_list);



	mutex_unlock(&fs_info->fs_devices->device_list_mutex);

	mutex_unlock(&uuid_mutex);



	/*

	 * The update_dev_time() with in btrfs_scratch_superblocks()