linux-kernel - Re: Arm sub architectures missing clk_round

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:	Sat, 8 Jun 2013 10:21:33 +0100
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Jonathan Cameron <jic23@...nel.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
	"Hennerich, Michael" <Michael.Hennerich@...log.com>,
	Lars-Peter Clausen <lars@...afoo.de>
Subject: Re: Arm sub architectures missing clk_round_rate()

On Sat, Jun 08, 2013 at 09:57:17AM +0100, Jonathan Cameron wrote:
> At least one Arm subarch (pxa) does no provide an implementation of this
> function.  As far as I can see there is no way for a driver wishing to use
> it to detect it's absence.  This is marked in clk.h as being optional
> for 'Machine Class support'. Obvious solutions to this are:
> 
> 1) It is effectively only usable by platform specific drivers as no
>    more generic driver can know it is available.  Perhaps even a stub that
>    returns an appropriate error would be acceptable.
> 
> 2) It is not as optional as the header implies and should always be implemented
>    if the rest of the clk framework is.
> 
> 3) There should be some means of detecting its absense so that drivers can
>    be dependant on its presene.
> 
> Which is the correct one?

The right answer is (2) now that we have things like the clk framework and
soo many users.
--
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/