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btrfs: Don't use objectid_mutex during mount

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Since the filesystem is not well formed and no trees are loaded it's
pointless holding the objectid_mutex. Just remove its usage.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Nikolay Borisov 2019-10-15 18:42:21 +03:00 committed by David Sterba
parent b8522a1e5f
commit 336a0d8df1
1 changed files with 4 additions and 3 deletions
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7
fs/btrfs/disk-io.c
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@ -2666,17 +2666,18 @@ int __cold init_tree_roots(struct btrfs_fs_info *fs_info)
tree_root->commit_root = btrfs_root_node(tree_root);
btrfs_set_root_refs(&tree_root->root_item, 1);
mutex_lock(&tree_root->objectid_mutex);
/*
* No need to hold btrfs_root::objectid_mutex since the fs
* hasn't been fully initialised and we are the only user
*/
ret = btrfs_find_highest_objectid(tree_root,
&tree_root->highest_objectid);
if (ret < 0) {
mutex_unlock(&tree_root->objectid_mutex);
handle_error = true;
continue;
}
ASSERT(tree_root->highest_objectid <= BTRFS_LAST_FREE_OBJECTID);
mutex_unlock(&tree_root->objectid_mutex);
ret = btrfs_read_roots(fs_info);
if (ret < 0) {