From: Steven Rostedt <srostedt@redhat.com>
Date: Fri, 8 May 2009 15:03:57 +0000 (-0400)
Subject: ring-buffer: check for divide by zero in ring-buffer-benchmark
X-Git-Tag: v2.6.31-rc1~401^2~48
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d988ff94c1074c4c914235c8591bcceafb585ecf;p=pandora-kernel.git

ring-buffer: check for divide by zero in ring-buffer-benchmark

Although we check if "missed" is not zero, we divide by hit + missed,
and the addition can possible overflow and become a divide by zero.

This patch checks for this case, and will report it when it happens
then modify "hit" to make the calculation be non zero.

[ Impact: prevent possible divide by zero in ring-buffer-benchmark ]

Reported-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---

Reading git-diff-tree failed