hung_task: decrement sysctl_hung_task_warnings only if it is positive
authorTetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Tue, 13 Dec 2016 00:45:35 +0000 (16:45 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 13 Dec 2016 02:55:09 +0000 (18:55 -0800)
commit4ca5ede07c9871c13ae422c96d6d08dbd0df5eda
tree71b67a4356f091441bd67074ac41398b50cb323e
parent1270dd8d994039b677d0504ba7260873d608bf75
hung_task: decrement sysctl_hung_task_warnings only if it is positive

Since sysctl_hung_task_warnings == -1 is allowed (infinite warnings),
commit 48a6d64edadb ("hung_task: allow hung_task_panic when
hung_task_warnings is 0") should decrement it only when it is not -1.

This prevents the kernel from ceasing warnings after the first
4294967295 ;)

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: John Siddle <jsiddle@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
kernel/hung_task.c