linux-kernel - Re: [RESEND] [PATCH v2 1/2] arm: devtree: Set system

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: <20150625071851.GB2890@pali>
Date:	Thu, 25 Jun 2015 09:18:51 +0200
From:	Pali Rohár <pali.rohar@...il.com>
To:	Tony Lindgren <tony@...mide.com>
Cc:	Arnd Bergmann <arnd@...db.de>,
	linux-arm-kernel@...ts.infradead.org,
	Rob Herring <robherring2@...il.com>,
	Russell King <linux@....linux.org.uk>,
	Will Deacon <will.deacon@....com>,
	Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
	Sebastian Reichel <sre@...ian.org>,
	Pavel Machek <pavel@....cz>,
	Andreas Färber <afaerber@...e.de>,
	linux-omap@...r.kernel.org,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	devicetree@...r.kernel.org
Subject: Re: [RESEND] [PATCH v2 1/2] arm: devtree: Set system_rev from DT
 revision

On Wednesday 24 June 2015 22:01:38 Tony Lindgren wrote:
> * Pali Rohár <pali.rohar@...il.com> [150506 04:45]:
> > On Wednesday 06 May 2015 13:04:01 Arnd Bergmann wrote:
> > > > 
> > > > It needs to be done in this code, so "system_rev" variable is set
> > > > properly...
> > > 
> > > What I mean is which code accesses this variable that early?
> > > 
> > 
> > ATAG code is doing it at same early stage, so I added it to same early
> > stage...
> 
> Yes we should do this early like the other atags.
>  
> > > > > Also, it seems strange to have a string property and then use kstrtouint
> > > > > to convert it into a number. I think it should either be specified in a DT
> > > > > binding to be a string and then have the kernel not assume that it is a number,
> > > > > or we should define it to be binary.
> > > > > 
> > > > >       Arnd
> > > > 
> > > > Variable "system_rev" is number and it always was. So chaning type will
> > > > break more parts.
> > > > 
> > > > And it is string DT property to be human readable. Some other developers
> > > > suggested for v2 to change it to string (from number).
> > > 
> > > Both of them would be human readable, you just use something else to
> > > read them ;-)
> > > 
> > > If we have a string here, we should just change all uses of system_rev
> > > in the kernel accordingly, there are only a few of them:
> 
> Let's just keep it as a hex as it was. After all it's an existing
> interface in /proc that user space programs may expect to be in
> hex format already.
> 
> Pali, care to repost the whole set again right after -rc1 with
> with rev property naming and documentation added? Just keep it
> as hex and let's forget any string conversion.
> 
> Regards,
> 
> Tony

Ok, but what do you mean to forget any string conversion?

-- 
Pali Rohár
pali.rohar@...il.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/