btrfs: assert extent map tree lock in add_extent_mapping
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>
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@ -384,6 +384,8 @@ int add_extent_mapping(struct extent_map_tree *tree,
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{
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int ret = 0;
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lockdep_assert_held_write(&tree->lock);
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ret = tree_insert(&tree->map, em);
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if (ret)
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goto out;
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