tree f44790d9b8f42223955d1866645103ac5f9c68a3
parent 38f21977663126fef53f5585e7f1653d8ebe55c4
author Nick Piggin <npiggin@suse.de> 1231281626 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1231286349 -0800

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>