commit 237fc6e7a35076f584b9d0794a5204fe4bd9b9e5
author Thomas Gleixner <tglx@linutronix.de> Wed Apr 30 00:55:04 2008 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Wed Apr 30 08:29:53 2008 -0700
tree 078de7357c118b5bb84eedb38ba829205941b03b
parent c6f3a97f86a5c97be0ca255976110bb9c3cfe669

add hrtimer specific debugobjects code

hrtimers have now dynamic users in the network code.  Put them under
debugobjects surveillance as well.

Add calls to the generic object debugging infrastructure and provide fixup
functions which allow to keep the system alive when recoverable problems have
been detected by the object debugging core code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Greg KH <greg@kroah.com>
Cc: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

kernel/futex.c

diff --git a/kernel/futex.c b/kernel/futex.c
index e43945e..98092c9 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1266,11 +1266,13 @@
 		if (!abs_time)
 			schedule();
 		else {
-			hrtimer_init(&t.timer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+			hrtimer_init_on_stack(&t.timer, CLOCK_MONOTONIC,
+						HRTIMER_MODE_ABS);
 			hrtimer_init_sleeper(&t, current);
 			t.timer.expires = *abs_time;
 
-			hrtimer_start(&t.timer, t.timer.expires, HRTIMER_MODE_ABS);
+			hrtimer_start(&t.timer, t.timer.expires,
+						HRTIMER_MODE_ABS);
 			if (!hrtimer_active(&t.timer))
 				t.task = NULL;
 
@@ -1286,6 +1288,8 @@
 
 			/* Flag if a timeout occured */
 			rem = (t.task == NULL);
+
+			destroy_hrtimer_on_stack(&t.timer);
 		}
 	}
 	__set_current_state(TASK_RUNNING);
@@ -1367,7 +1371,8 @@
 
 	if (time) {
 		to = &timeout;
-		hrtimer_init(&to->timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
+		hrtimer_init_on_stack(&to->timer, CLOCK_REALTIME,
+				      HRTIMER_MODE_ABS);
 		hrtimer_init_sleeper(to, current);
 		to->timer.expires = *time;
 	}
@@ -1581,6 +1586,8 @@
 	unqueue_me_pi(&q);
 	futex_unlock_mm(fshared);
 
+	if (to)
+		destroy_hrtimer_on_stack(&to->timer);
 	return ret != -EINTR ? ret : -ERESTARTNOINTR;
 
  out_unlock_release_sem:
@@ -1588,6 +1595,8 @@
 
  out_release_sem:
 	futex_unlock_mm(fshared);
+	if (to)
+		destroy_hrtimer_on_stack(&to->timer);
 	return ret;
 
  uaddr_faulted:
@@ -1615,6 +1624,8 @@
 	if (!ret && (uval != -EFAULT))
 		goto retry;
 
+	if (to)
+		destroy_hrtimer_on_stack(&to->timer);
 	return ret;
 }