From: Zhao Lei <zhaolei@cn.fujitsu.com>
Date: Thu, 13 Nov 2014 03:45:38 +0000 (+0800)
Subject: Btrfs, replace: enable dev-replace for raid56
X-Git-Url: http://git.hungrycats.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=57b51483a3559245bd2347d87d07fb1aeb5b61c8;p=linux

Btrfs, replace: enable dev-replace for raid56

Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
(cherry picked from commit 5d3edd8f44aac94de7b16f4c54290e24f5e8c532)
---

diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 8df728ce0940..ca6a3a3b6b6c 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -316,11 +316,6 @@ int btrfs_dev_replace_start(struct btrfs_root *root,
 	struct btrfs_device *tgt_device = NULL;
 	struct btrfs_device *src_device = NULL;
 
-	if (btrfs_fs_incompat(fs_info, RAID56)) {
-		btrfs_warn(fs_info, "dev_replace cannot yet handle RAID5/RAID6");
-		return -EOPNOTSUPP;
-	}
-
 	switch (args->start.cont_reading_from_srcdev_mode) {
 	case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_ALWAYS:
 	case BTRFS_IOCTL_DEV_REPLACE_CONT_READING_FROM_SRCDEV_MODE_AVOID: