linux-kernel - [PATCH 0/4] sb_write: lockdep fixes/cleanups

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Date:	Mon, 20 Jul 2015 19:00:44 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Al Viro <viro@...iv.linux.org.uk>,
	Dave Chinner <david@...morbit.com>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	Jan Kara <jack@...e.cz>
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 0/4] sb_write: lockdep fixes/cleanups

So this is the preparation for percpu_rw_semaphore conversion. But let
me repeat, imo these changes make sense in any case, so I'd like to send
them separately.

2/4 fixes 2 bugs and cleanups the "trylock" hack. Although this hack can
be probably removed, see the changelog.

3/4 and 4/4 try to make the lockdep annotations more consistent. If we
want to use lockdep we should not hide the "write" locks we hold when we
call freeze_fs(sb) and unfreeze_fs(sb).

Please review.

Oleg.

 fs/btrfs/transaction.c |    8 +---
 fs/super.c             |  101 +++++++++++++++++++++++++++++------------------
 fs/xfs/xfs_aops.c      |    6 +--
 include/linux/fs.h     |    5 ++
 4 files changed, 71 insertions(+), 49 deletions(-)

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