From: Namhyung Kim <namhyung@gmail.com>
Date: Tue, 14 Sep 2010 12:43:47 +0000 (+0900)
Subject: futex: Mark restart_block.futex.uaddr[2] __user
X-Git-Tag: v2.6.37-rc1~193^2~2
X-Git-Url: https://bbs.cooldavid.org/git/?p=net-next-2.6.git;a=commitdiff_plain;h=a3c74c52570c0c4ac90c9a0216de800c39089ba7

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@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Darren Hart <dvhltc@us.ibm.com>
LKML-Reference: <1284468228-8723-2-git-send-email-namhyung@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---

diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h
index a8cc4e13434..c9069654417 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 464de2751ff..45e448a5e44 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;