btrfs: assert root delalloc lock is held at __btrfs_del_delalloc_inode()

This function requires the delalloc lock of the inode's root to be held,
so assert it's held.

Reviewed-by: Boris Burkov <boris@bur.io>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 84e7b61b23343cf4243b6de29fc582eb389d5d87..c397a503e9271c3589e61e06fa7aa5f9162e5b8c 100644 (file)
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -2411,6 +2411,8 @@ void __btrfs_del_delalloc_inode(struct btrfs_inode *inode)
        struct btrfs_root *root = inode->root;
        struct btrfs_fs_info *fs_info = root->fs_info;
 
+       lockdep_assert_held(&root->delalloc_lock);
+
        if (!list_empty(&inode->delalloc_inodes)) {
                list_del_init(&inode->delalloc_inodes);
                clear_bit(BTRFS_INODE_IN_DELALLOC_LIST,