[PATCH 1/4] change get_super_thawed() to use sb_start/end_write()

[Oleg Nesterov <oleg@redhat.com>]

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