From: Tina Ruchandani <ruchandani.tina@gmail.com>
Date: Thu, 30 Oct 2014 21:35:01 +0000 (-0700)
Subject: Staging: lustre: lnet: lnet: Better cookie gen
X-Git-Tag: omap-for-v3.19/fixes-rc1~73^2~541
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9056be30542bfff51190bdda67088f319cf4c9f5;p=pandora-kernel.git

Staging: lustre: lnet: lnet: Better cookie gen

api-ni.c uses do_gettimeofday to get a 'cookie' or timestamp.
This patch replaces it with ktime_get_ns for the following reasons:
1. ktime_get_ns returns a __u64 which is safer than 'struct timeval'
which will overflow on 32-bit systems in year 2038 and beyond.
2. Improved resolution: nsecs instead of usecs.
3. Reduced compute: ktime_get_ns is faster than the multiply/add
   combination used in this function

Signed-off-by: Tina Ruchandani <ruchandani.tina@gmail.com>
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

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