From: Li Zefan <lizf@cn.fujitsu.com>
Date: Wed, 8 Jun 2011 03:56:44 +0000 (+0000)
Subject: Btrfs: use join_transaction in btrfs_evict_inode()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=30b4caf5d73af5c99cf1b2b46496d8bc35330992;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

Btrfs: use join_transaction in btrfs_evict_inode()

The WARN_ON() in start_transaction() was triggered while balancing.

The cause is btrfs_relocate_chunk() started a transaction and
then called iput() on the inode that stores free space cache,
and iput() called btrfs_start_transaction() again.

Reported-by: Tsutomu Itoh <t-itoh@jp.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Reviewed-by: Josef Bacik <josef@redhat.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 113913ae36e0..c15636b17874 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -3646,7 +3646,7 @@ void btrfs_evict_inode(struct inode *inode)
 	btrfs_i_size_write(inode, 0);
 
 	while (1) {
-		trans = btrfs_start_transaction(root, 0);
+		trans = btrfs_join_transaction(root);
 		BUG_ON(IS_ERR(trans));
 		trans->block_rsv = root->orphan_block_rsv;