linux-kernel - [tip:core/futexes] futex: Mark restart_block.futex.uaddr[2] _

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Message-ID: <tip-a3c74c52570c0c4ac90c9a0216de800c39089ba7@git.kernel.org>
Date:	Sat, 18 Sep 2010 10:22:29 GMT
From:	tip-bot for Namhyung Kim <namhyung@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, dvhltc@...ibm.com, hpa@...or.com,
	mingo@...hat.com, a.p.zijlstra@...llo.nl, tglx@...utronix.de,
	namhyung@...il.com
Subject: [tip:core/futexes] futex: Mark restart_block.futex.uaddr[2] __user

Commit-ID:  a3c74c52570c0c4ac90c9a0216de800c39089ba7
Gitweb:     http://git.kernel.org/tip/a3c74c52570c0c4ac90c9a0216de800c39089ba7
Author:     Namhyung Kim <namhyung@...il.com>
AuthorDate: Tue, 14 Sep 2010 21:43:47 +0900
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sat, 18 Sep 2010 12:19:21 +0200

futex: Mark restart_block.futex.uaddr[2] __user

@uaddr and @uaddr2 fields in restart_block.futex are user
pointers. Add __user and remove unnecessary casts.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Darren Hart <dvhltc@...ibm.com>
LKML-Reference: <1284468228-8723-2-git-send-email-namhyung@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 include/linux/thread_info.h |    4 ++--
 kernel/futex.c              |    4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index a8cc4e1..c906965 100644
--- a/include/linux/thread_info.h
+++ b/include/linux/thread_info.h
@@ -23,12 +23,12 @@ struct restart_block {
 		};
 		/* For futex_wait and futex_wait_requeue_pi */
 		struct {
-			u32 *uaddr;
+			u32 __user *uaddr;
 			u32 val;
 			u32 flags;
 			u32 bitset;
 			u64 time;
-			u32 *uaddr2;
+			u32 __user *uaddr2;
 		} futex;
 		/* For nanosleep */
 		struct {
diff --git a/kernel/futex.c b/kernel/futex.c
index 464de27..45e448a 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1843,7 +1843,7 @@ retry:
 
 	restart = &current_thread_info()->restart_block;
 	restart->fn = futex_wait_restart;
-	restart->futex.uaddr = (u32 *)uaddr;
+	restart->futex.uaddr = uaddr;
 	restart->futex.val = val;
 	restart->futex.time = abs_time->tv64;
 	restart->futex.bitset = bitset;
@@ -1869,7 +1869,7 @@ out:
 
 static long futex_wait_restart(struct restart_block *restart)
 {
-	u32 __user *uaddr = (u32 __user *)restart->futex.uaddr;
+	u32 __user *uaddr = restart->futex.uaddr;
 	int fshared = 0;
 	ktime_t t, *tp = NULL;
 
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