tree e8b55b84cc50841ab7f7c87afdcc3d5e419cb4e9
parent de87fcc124a5d4a171aa32707b3265608ebda6e7
author Darren Hart <dvhltc@us.ibm.com> 1236844552 -0700
committer Ingo Molnar <mingo@elte.hu> 1236853256 +0100

futex: add double_unlock_hb()

Impact: cleanup

The futex code uses double_lock_hb() which locks the hb->lock's
in pointer value order.  There is no parallel unlock routine,
and the code unlocks them in name order, ignoring pointer value.

This patch adds double_unlock_hb() to refactor the duplicated
code segments.

Build and boot tested on a 4 way Intel x86_64 workstation.
Passes basic pthread_mutex and PI tests out of
ltp/testcases/realtime.

Signed-off-by: Darren Hart <dvhltc@us.ibm.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
LKML-Reference: <20090312075552.9856.48021.stgit@Aeon>
Signed-off-by: Ingo Molnar <mingo@elte.hu>