From: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Date: Tue, 11 May 2010 21:06:51 +0000 (-0700)
Subject: kexec: fix OOPS in crash_kernel_shrink
X-Git-Tag: v2.6.34~42
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=475f9aa6aa538befcbd0fa95bdebada600f247cd;p=pandora-kernel.git

kexec: fix OOPS in crash_kernel_shrink

Two "echo 0 > /sys/kernel/kexec_crash_size" OOPSes kernel.  Also content
of this file is invalid after first shrink to zero: it shows 1 instead of
0.

This scenario is unlikely to happen often (root privs, valid crashkernel=
in cmdline, dump-capture kernel not loaded), I hit it only by chance.

This patch fixes it.

Signed-off-by: Vitaly Mayatskikh <v.mayatskih@gmail.com>
Cc: Cong Wang <amwang@redhat.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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