From: Nick Piggin <npiggin@suse.de>
Date: Tue, 6 Jan 2009 22:40:26 +0000 (-0800)
Subject: fs: sys_sync fix
X-Git-Tag: v2.6.29-rc1~400
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=856bf4d717feb8c55d4e2f817b71ebb70cfbc67b;p=pandora-kernel.git

fs: sys_sync fix

s_syncing livelock avoidance was breaking data integrity guarantee of
sys_sync, by allowing sys_sync to skip writing or waiting for superblocks
if there is a concurrent sys_sync happening.

This livelock avoidance is much less important now that we don't have the
get_super_to_sync() call after every sb that we sync.  This was replaced
by __put_super_and_need_restart.

Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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