[PATCH] Btrfs-progs: don't set INCOMPAT_EXTENDED_IREF flag when making a new fs

[Miao Xie <miaox@cn.fujitsu.com>]

There is no extended irefs in the new fs, and we can mount it on
the old kernel without extended iref function safely. So we needn't
set INCOMPAT_EXTENDED_IREF flag when making a new fs, and just set
it when we actually insert a extended iref.

Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Cc: Mark Fasheh <mfasheh@suse.de>
---
 mkfs.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/mkfs.c b/mkfs.c
index c8cb395..aca6e46 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -1654,8 +1654,6 @@ raid_groups:
 
 	super = root->fs_info->super_copy;
 	flags = btrfs_super_incompat_flags(super);
-	flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
-
 	if (mixed)
 		flags |= BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS;
 
-- 
1.8.0.1