linux-kernel - Re: [PATCH 1/4] fs/autofs: Use time_before, time_before

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

Date:	Wed, 26 Dec 2007 20:19:13 +0100 (CET)
From:	Julia Lawall <julia@...u.dk>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	autofs@...ux.kernel.org, linux-kernel@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: Re: [PATCH 1/4] fs/autofs: Use time_before, time_before_eq, etc.

On Wed, 26 Dec 2007, H. Peter Anvin wrote:

> Julia Lawall wrote:
> > From: Julia Lawall <julia@...u.dk>
> > 
> > The functions time_before, time_before_eq, time_after, and time_after_eq
> > are more robust for comparing jiffies against other values.
> > 
> 
> More robust, how?  You already almost introduced a bug here...

I'm just summarizing the comment that goes with the definition of the 
time_after etc functions:

include/linux/jiffies.h:88
/*
 *	These inlines deal with timer wrapping correctly. You are 
 *	strongly encouraged to use them
 *	1. Because people otherwise forget
 *	2. Because if the timer wrap changes in future you won't have to
 *	   alter your driver code.
 *

julia
--
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/