linux-kernel - [PATCH] futex: remove the pointer math from double_unlock

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Message-ID: <20090312221118.11146.68610.stgit@Aeon>
Date:	Thu, 12 Mar 2009 15:11:18 -0700
From:	Darren Hart <dvhltc@...ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	Darren Hart <dvhltc@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...e.hu>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: [PATCH] futex: remove the pointer math from double_unlock_hb

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@...ibm.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ingo Molnar <mingo@...e.hu>
Cc: Rusty Russell <rusty@...tcorp.com.au>
---

 kernel/futex.c |   10 ++--------
 1 files changed, 2 insertions(+), 8 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 9c97f67..2331b73 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -658,14 +658,8 @@ 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);
-	}
+	spin_unlock(&hb1->lock);
+	spin_unlock(&hb2->lock);
 }
 
 /*

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