commit f39cdaebb89dc3e6dd4f3e75b6d4e87ef12190af
author Anton Blanchard <anton@samba.org> Wed Jun 20 12:53:03 2012 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> Wed Jun 20 14:39:36 2012 -0700
tree 3e6db2d5c97c822591350be26a09097589ef5b8c
parent 10d8935f46e5028847b179757ecbf9238b13d129

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>