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btrfs: assert extent map tree lock in add_extent_mapping

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As add_extent_mapping is called from several functions, let's add the
lock annotation. The tree is going to be modified so it must be the
exclusive lock.

Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2019-03-27 16:19:55 +01:00
parent 982f1f5d16
commit d23ea3fa7d
1 changed files with 2 additions and 0 deletions
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fs/btrfs/extent_map.c
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@ -384,6 +384,8 @@ int add_extent_mapping(struct extent_map_tree *tree,
{
int ret = 0;
lockdep_assert_held_write(&tree->lock);
ret = tree_insert(&tree->map, em);
if (ret)
goto out;