From aa2c96d6f329e66cc59352b0f12e8f04e6a9593b Mon Sep 17 00:00:00 2001
From: Josh Hunt <johunt@akamai.com>
Date: Mon, 27 Jun 2011 16:18:08 -0700
Subject: [PATCH] drivers/misc/lkdtm.c: fix race when crashpoint is hit
 multiple times before checking count

We observed the crash point count going negative in cases where the
crash point is hit multiple times before the check of "count == 0" is
done.  Because of this we never call lkdtm_do_action().  This patch just
adds a spinlock to protect count.

Reported-by: Tapan Dhimant <tdhimant@akamai.com>
Signed-off-by: Josh Hunt <johunt@akamai.com>
Acked-by: Ankita Garg <ankita@in.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
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