linux-kernel - Re: [PATCH][RFC] ide: pdc202xxx_new: Remove do_gettimeofday() usage for ktime

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <1721240.TWtHUuoOhJ@wuerfel>
Date:	Wed, 07 Jan 2015 22:37:50 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	John Stultz <john.stultz@...aro.org>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>, linux-ide@...r.kernel.org
Subject: Re: [PATCH][RFC] ide: pdc202xxx_new: Remove do_gettimeofday() usage for ktime_get

On Wednesday 07 January 2015 13:01:33 John Stultz wrote:
> +       usec_elapsed = (long)ktime_to_ns(ktime_sub(end_time, start_time))/1000;
> 

This should use ktime_us_delta for brevity. Doing the 32-bit division that
you have here is probably slightly more efficient because it avoids do_div(),
but it's not performance critical.

	Arnd
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/