tree f55ea0606247dd2fef36905c9ae817060cfae149
parent 8ac2120d90273c590cf7662f03d103519101685b
author Zach Brown <zach.brown@oracle.com> 1126924089 -0700
committer Linus Torvalds <torvalds@g5.osdl.org> 1126983002 -0700

[PATCH] Add smp_mb__after_clear_bit() to unlock_kiocb()

Add smp_mb__after_clear_bit() to unlock_kiocb()

AIO's use of wait_on_bit_lock()/wake_up_bit() forgot to add a barrier
between clearing its lock bit and calling wake_up_bit() so wake_up_bit()'s
unlocked waitqueue_active() can race.  This puts AIO's use in line with the
others and the comment above wake_up_bit().

Signed-off-by: Zach Brown <zach.brown@oracle.com>
Acked-by: Benjamin LaHaise <bcrl@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>