From: Nikolay Borisov <nborisov@suse.com>
Date: Fri, 27 Apr 2018 09:21:52 +0000 (+0300)
Subject: btrfs: Add assert in __btrfs_del_delalloc_inode
X-Git-Tag: v4.18-rc1~176^2~102
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c8a0d363aca1447a0e82e31c54d220e3ecd6a87;p=thirdparty%2Fkernel%2Flinux.git

btrfs: Add assert in __btrfs_del_delalloc_inode

The invariant is that when nr_delalloc_inodes is 0 then the root
mustn't have any inodes on its delalloc inodes list.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 29374d31f1deb..a7529827d89c8 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -1754,6 +1754,7 @@ void __btrfs_del_delalloc_inode(struct btrfs_root *root,
 			  &inode->runtime_flags);
 		root->nr_delalloc_inodes--;
 		if (!root->nr_delalloc_inodes) {
+			ASSERT(list_empty(&root->delalloc_inodes));
 			spin_lock(&fs_info->delalloc_root_lock);
 			BUG_ON(list_empty(&root->delalloc_root));
 			list_del_init(&root->delalloc_root);