From 972fae6993cbbb934345011664dc703c0891dda3 Mon Sep 17 00:00:00 2001
From: Aaron Tomlin <atomlin@redhat.com>
Date: Wed, 15 Apr 2015 16:16:47 -0700
Subject: [PATCH] kernel/hung_task.c: change hung_task.c to use
for_each_process_thread()
In check_hung_uninterruptible_tasks() avoid the use of deprecated
while_each_thread().
The "max_count" logic will prevent a livelock - see commit 0c740d0a
("introduce for_each_thread() to replace the buggy while_each_thread()").
Having said this let's use for_each_process_thread().
Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Dave Wysochanski <dwysocha@redhat.com>
Cc: Aaron Tomlin <atomlin@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
kernel/hung_task.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/kernel/hung_task.c b/kernel/hung_task.c
index 06db12434d727..e0f90c2b57aa8 100644
--- a/kernel/hung_task.c
+++ b/kernel/hung_task.c
@@ -169,7 +169,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
return;
rcu_read_lock();
- do_each_thread(g, t) {
+ for_each_process_thread(g, t) {
if (!max_count--)
goto unlock;
if (!--batch_count) {
@@ -180,7 +180,7 @@ static void check_hung_uninterruptible_tasks(unsigned long timeout)
/* use "==" to skip the TASK_KILLABLE tasks waiting on NFS */
if (t->state == TASK_UNINTERRUPTIBLE)
check_hung_task(t, timeout);
- } while_each_thread(g, t);
+ }
unlock:
rcu_read_unlock();
}
--
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