From: Anton Blanchard <anton@samba.org>
Date: Wed, 20 Jun 2012 19:53:03 +0000 (-0700)
Subject: fault-inject: avoid call to random32() if fault injection is disabled
X-Git-Tag: v3.5-rc4~20^2~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f39cdaebb89dc3e6dd4f3e75b6d4e87ef12190af;p=pandora-kernel.git

fault-inject: avoid call to random32() if fault injection is disabled

After enabling CONFIG_FAILSLAB I noticed random32 in profiles even if slub
fault injection wasn't enabled at runtime.

should_fail forces a comparison against random32() even if probability is
0:

        if (attr->probability <= random32() % 100)
                return false;

Add a check up front for probability == 0 and avoid all of the more
complicated checks.

Signed-off-by: Anton Blanchard <anton@samba.org>
Acked-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---

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