linux-kernel - [tip:core/urgent] futex: Fix compat_futex to be same as futex for REQUEUE

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Date:	Mon, 10 Aug 2009 13:51:35 GMT
From:	tip-bot for Dinakar Guniguntala <dino@...ibm.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, dvhltc@...ibm.com, hpa@...or.com,
	mingo@...hat.com, dino@...ibm.com, tglx@...utronix.de,
	mingo@...e.hu
Subject: [tip:core/urgent] futex: Fix compat_futex to be same as futex for REQUEUE_PI

Commit-ID:  4dc88029fd916b860ef063c40180aa604ce93494
Gitweb:     http://git.kernel.org/tip/4dc88029fd916b860ef063c40180aa604ce93494
Author:     Dinakar Guniguntala <dino@...ibm.com>
AuthorDate: Mon, 10 Aug 2009 18:31:42 +0530
Committer:  Ingo Molnar <mingo@...e.hu>
CommitDate: Mon, 10 Aug 2009 15:41:12 +0200

futex: Fix compat_futex to be same as futex for REQUEUE_PI

Need to add the REQUEUE_PI checks to the compat_sys_futex API
as well to ensure 32 bit requeue's work fine on a 64 bit
system. Patch is against latest tip

Signed-off-by: Dinakar Guniguntala <dino@...ibm.com>
Cc: Darren Hart <dvhltc@...ibm.com>
LKML-Reference: <20090810130142.GA23619@...ibm.com>
Signed-off-by: Ingo Molnar <mingo@...e.hu>


---
 kernel/futex_compat.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/kernel/futex_compat.c b/kernel/futex_compat.c
index d607a5b..2357165 100644
--- a/kernel/futex_compat.c
+++ b/kernel/futex_compat.c
@@ -180,7 +180,8 @@ asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 	int cmd = op & FUTEX_CMD_MASK;
 
 	if (utime && (cmd == FUTEX_WAIT || cmd == FUTEX_LOCK_PI ||
-		      cmd == FUTEX_WAIT_BITSET)) {
+		      cmd == FUTEX_WAIT_BITSET ||
+		      cmd == FUTEX_WAIT_REQUEUE_PI)) {
 		if (get_compat_timespec(&ts, utime))
 			return -EFAULT;
 		if (!timespec_valid(&ts))
@@ -191,7 +192,8 @@ asmlinkage long compat_sys_futex(u32 __user *uaddr, int op, u32 val,
 			t = ktime_add_safe(ktime_get(), t);
 		tp = &t;
 	}
-	if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE)
+	if (cmd == FUTEX_REQUEUE || cmd == FUTEX_CMP_REQUEUE ||
+	    cmd == FUTEX_CMP_REQUEUE_PI || cmd == FUTEX_WAKE_OP)
 		val2 = (int) (unsigned long) utime;
 
 	return do_futex(uaddr, op, val, tp, uaddr2, val2, val3);
--
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