tree 71b67a4356f091441bd67074ac41398b50cb323e
parent 1270dd8d994039b677d0504ba7260873d608bf75
author Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> 1481589935 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1481597709 -0800

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>