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DateSun, 9 Mar 2008 12:48:44 +0100
FromIngo Molnar <>
SubjectRe: [PATCH] Fix check after use in kernel/exit.c
* WANG Cong <xiyou.wangcong@gmail.com> wrote:

> > actually, i unapplied it again because the patch is wrong: 
> > mm_release() has side-effects for kernel threads such as the 
> > deactivate_mm() [which is important even if the user-mm is NULL]. If 
> > the NULL mm dereference can really trigger then it should be avoided 
> > within mm_release().> > Do you mean that the NULL check should be moved into mm_release()?

yes - we need to run deactivate_mm() for kernel threads.

	Ingo


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