[PATCH 4/4] common: filter warning messages from mkfs.ext4

["Theodore Ts'o" <tytso@mit.edu>]

Commit 4a5cda8102828 ("xfstests: do not unmount tmpfs during remount")
changed generic/135 to no longer redirect stderr to /dev/null when
running _scratch_mkfs.  This caused ext4 using a 1k block size to fail
when running this test because mkfs.ext4 would issue a warning message
about the use of a non-block size that wasn't expected by golden
output for the test.  Fix this by filtering out warning messages in
_scratch_mkfs_ext4.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
---
 common/rc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/common/rc b/common/rc
index f07b274..5fb3282 100644
--- a/common/rc
+++ b/common/rc
@@ -655,7 +655,7 @@ _scratch_mkfs_ext4()
 	fi
 
 	# output stored mkfs output
-	cat $tmp_dir.mkfserr >&2
+	grep -v ^Warning: $tmp_dir.mkfserr >&2
 	cat $tmp_dir.mkfsstd
 	rm -f $tmp_dir.mkfserr $tmp_dir.mkfsstd
 
-- 
2.5.0