Commit 3dd0f7a3 authored Apr 12, 2018 by Anand Jain Committed by David Sterba May 28, 2018

btrfs: document uuid_mutex uasge in read_chunk_tree



read_chunk_tree() calls read_one_dev(), but for seed device we have
to search the fs_uuids list, so we need the uuid_mutex. Add a comment
comment, so that we can improve this part.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

parent 41a52a0f

fs/btrfs/volumes.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -6932,6 +6932,10 @@ int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
		if (!path)
		return -ENOMEM;

		/*
		* uuid_mutex is needed only if we are mounting a sprout FS
		* otherwise we don't need it.
		*/
		mutex_lock(&uuid_mutex);
		mutex_lock(&fs_info->chunk_mutex);