linux-kernel - [PATCH 1/4] change get_super_thawed() to use sb_start/end

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Message-ID: <20150713212548.GA13873@redhat.com>
Date:	Mon, 13 Jul 2015 23:25:48 +0200
From:	Oleg Nesterov <oleg@...hat.com>
To:	Al Viro <viro@...iv.linux.org.uk>, Jan Kara <jack@...e.cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Paul McKenney <paulmck@...ux.vnet.ibm.com>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	Daniel Wagner <daniel.wagner@...-carit.de>,
	Davidlohr Bueso <dave@...olabs.net>,
	Ingo Molnar <mingo@...hat.com>, Tejun Heo <tj@...nel.org>,
	linux-kernel@...r.kernel.org
Subject: [PATCH 1/4] change get_super_thawed() to use sb_start/end_write()

Preparation. get_super_thawed() can do sb_start/end_write() with
the same effect, we are going to kill sb_writers->wait_unfrozen.
---
 fs/super.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/super.c b/fs/super.c
index 928c20f..5ea0edd 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -621,8 +621,8 @@ struct super_block *get_super_thawed(struct block_device *bdev)
 		if (!s || s->s_writers.frozen == SB_UNFROZEN)
 			return s;
 		up_read(&s->s_umount);
-		wait_event(s->s_writers.wait_unfrozen,
-			   s->s_writers.frozen == SB_UNFROZEN);
+		sb_start_write(s);
+		sb_end_intwrite(s);
 		put_super(s);
 	}
 }
-- 
1.5.5.1

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