tree 5d1d118d6b671b98edbeabee15e15869305d129f
parent d096ad0f79a782935d2e06ae8fb235e8c5397775
author Theodore Ts'o <tytso@mit.edu> 1356590568 -0500
committer Theodore Ts'o <tytso@mit.edu> 1356590568 -0500

ext4: lock i_mutex when truncating orphan inodes

Commit c278531d39 added a warning when ext4_flush_unwritten_io() is
called without i_mutex being taken.  It had previously not been taken
during orphan cleanup since races weren't possible at that point in
the mount process, but as a result of this c278531d39, we will now see
a kernel WARN_ON in this case.  Take the i_mutex in
ext4_orphan_cleanup() to suppress this warning.

Reported-by: Alexander Beregalov <a.beregalov@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Zheng Liu <wenqing.lz@taobao.com>
Cc: stable@vger.kernel.org