linux-kernel - Re: [PATCH] RTC: Add mmap method to rtc character driver

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]

Message-ID: <20060725190743.GB31334@tuxdriver.com>
Date:	Tue, 25 Jul 2006 15:07:48 -0400
From:	"John W. Linville" <linville@...driver.com>
To:	Arjan van de Ven <arjan@...radead.org>
Cc:	Neil Horman <nhorman@...driver.com>, linux-kernel@...r.kernel.org,
	a.zummo@...ertech.it, jg@...edesktop.org
Subject: Re: [PATCH] RTC: Add mmap method to rtc character driver

On Tue, Jul 25, 2006 at 08:53:16PM +0200, Arjan van de Ven wrote:
> On Tue, 2006-07-25 at 14:43 -0400, Neil Horman wrote:

> > alternative, which, as I mentioned before I would be happy to take a crack at,
> > if you would elaborate on your idea a little more.
> 
> well the idea that has been tossed about a few times is using a vsyscall
> function that either calls into the kernel, or directly uses the hpet
> page (which can be user mapped) to get time information that way... 
> or even would use rdtsc in a way the kernel knows is safe (eg corrected
> for the local cpu's speed and offset etc etc).

Aren't both of those examples x86(_64)-specific?  Wouldn't a generic
solution be preferrable?

John
-- 
John W. Linville
linville@...driver.com
-
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/