linux-kernel - Re: [PATCH] [1/5] Only do century BCD conversion when we know the RTC is BCD

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, 13 Feb 2008 14:49:33 +0100
From:	Andi Kleen <ak@...e.de>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Andi Kleen <andi@...stfloor.org>, mingo@...e.hu,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [1/5] Only do century BCD conversion when we know the
 RTC is BCD

Thomas Gleixner wrote:
> On Mon, 11 Feb 2008, Andi Kleen wrote:
> 
>>> So the warning comes a bit late :)
>> I suspect if this was wrong before it would not have been noticed
>> because user space hwclock would work around it. 
> 
> And how exaclty does it work aroalund ? By setting the binary cmos clock
> with BCD values ?

By reading the value directly from CMOS I suppose and checking
the BCD bit and then setting the clock to the correct value [all
theoretical; i have not checked the hwclock code if
it does that or not. It might be wrong. Just a hypothesis.]

-Andi

--
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/