futex: remove the pointer math from double_unlock_hb

Impact: simplify code

I mistakenly included the pointer value ordering in the
double_unlock_hb() in my previous patch. It's only necessary
in the double_lock_hb() function. This patch removes it.

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: <20090312221118.11146.68610.stgit@Aeon>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

kernel/futex.c

@@ -658,15 +658,9 @@ double_lock_hb(struct futex_hash_bucket *hb1, struct futex_hash_bucket *hb2)
 static inline void
 double_unlock_hb(struct futex_hash_bucket *hb1, struct futex_hash_bucket *hb2)
 {
-	if (hb1 <= hb2) {
-		spin_unlock(&hb2->lock);
-		if (hb1 < hb2)
-			spin_unlock(&hb1->lock);
-	} else { /* hb1 > hb2 */
 	spin_unlock(&hb1->lock);
 	spin_unlock(&hb2->lock);
 }
-}
 
 /*
  * Wake up waiters matching bitset queued on this futex (uaddr).