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| author | Anand Jain <anand.jain@oracle.com> | 2018-04-12 10:29:32 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2018-05-28 18:23:14 +0200 |
| commit | 3dd0f7a3644eed9017f62ccd0067a91e8260d097 (patch) | |
| tree | 260dcd8c0c37507536b947a29822367388358da6 /fs/btrfs/volumes.c | |
| parent | 41a52a0f1bdcb3a17e2b384d6b6368a9590f9a58 (diff) | |
| download | linux-0-day-3dd0f7a3644eed9017f62ccd0067a91e8260d097.tar.gz linux-0-day-3dd0f7a3644eed9017f62ccd0067a91e8260d097.tar.xz | |
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>
Diffstat (limited to 'fs/btrfs/volumes.c')
| -rw-r--r-- | fs/btrfs/volumes.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c index a382d53c560af..6eec1e3f90833 100644 --- a/fs/btrfs/volumes.c +++ b/fs/btrfs/volumes.c @@ -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); |