From: Frederic Weisbecker <fweisbec@gmail.com>
Date: Tue, 30 Mar 2010 00:33:36 +0000 (+0200)
Subject: procfs: Use generic_file_llseek in /proc/vmcore
X-Git-Tag: v2.6.35-rc1~491^2~3
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=73296bc611cee009f3be6b451e827d1425b9c10f;p=pandora-kernel.git

procfs: Use generic_file_llseek in /proc/vmcore

/proc/vmcore has no llseek and then falls down to use default_llseek.
This is racy against read_vmcore() that directly manipulates fpos
but it doesn't hold the bkl there so using it in llseek doesn't
protect anything.

Let's use generic_file_llseek() instead.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: John Kacur <jkacur@redhat.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Al Viro <viro@ZenIV.linux.org.uk>
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