From: Anton Vorontsov <anton.vorontsov@linaro.org>
Date: Tue, 7 Feb 2012 06:49:51 +0000 (+0400)
Subject: sysrq: Properly check for kernel threads
X-Git-Tag: v3.4-rc1~185^2~112^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d3a532a9c617106a0169232d40164ee35d0440b5;p=pandora-kernel.git

sysrq: Properly check for kernel threads

There's a real possibility of killing kernel threads that might
have issued use_mm(), so kthread's mm might become non-NULL.

This patch fixes the issue by checking for PF_KTHREAD (just as
get_task_mm()).

Suggested-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org>
Acked-by: David Rientjes <rientjes@google.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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