linux-kernel - Re: [PATCH 2/2] x86: of: define irq functions to allow drivers/of/* to build on x86

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20100921091136.45f5f7fa@debxo>
Date:	Tue, 21 Sep 2010 09:11:36 -0700
From:	Andres Salomon <dilinger@...ued.net>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Grant Likely <grant.likely@...retlab.ca>,
	devicetree-discuss@...ts.ozlabs.org, x86@...nel.org,
	mingo@...hat.com, hpa@...or.com, Mitch Bradley <wmb@...top.org>,
	linux-kernel@...r.kernel.org,
	Stephen Neuendorffer <stephen.neuendorffer@...inx.com>
Subject: Re: [PATCH 2/2] x86: of: define irq functions to allow drivers/of/*
 to build on x86

On Tue, 21 Sep 2010 11:45:37 +0200 (CEST)
Thomas Gleixner <tglx@...utronix.de> wrote:

> On Mon, 20 Sep 2010, Andres Salomon wrote:
> > On Fri, 10 Sep 2010 12:21:35 -0600
> > Grant Likely <grant.likely@...retlab.ca> wrote:
> > 
> > > On Fri, Sep 10, 2010 at 08:14:58PM +0200, Ingo Molnar wrote:
> > > > 
> > > > * Grant Likely <grant.likely@...retlab.ca> wrote:
> > > > 
> > > > > On Fri, Sep 10, 2010 at 06:01:51AM -0700, Andres Salomon
> > > > > wrote:
> > > > > > 
> > > > > >  - Define a stub irq_create_of_mapping for x86 as a stop-gap
> > > > > > solution until drivers/of/irq is further along.
> > > > > >  - Define irq_dispose_mapping for x86 to appease of_i2c.c
> > > > > > 
> > > > > > Signed-off-by: Andres Salomon <dilinger@...ued.net>
> > > > > 
> > > > > Applied to my test-devicetree branch.  I'll need an ack from
> > > > > the x86 maintainers before I put it into my -next branch.
> > > > 
> > > > The purpose of the patch is not clear to me. What does it do and
> > > > why? 
> > > 
> > > It allows CONFIG_OF to be enabled on x86 without a build failure.
> > > 
> > > > The changelog says it's a stopgap measure - what exactly is the
> > > > long term plan and how long will it take?
> > > 
> > > It is a stop gap because it performs a trivial direct map of an
> > > IRQ number in the device tree data structure to a Linux irq
> > > number.  This works for a single IRQ controller, but falls apart
> > > when cascaded controller are described in the device tree.  The
> > > long term plan is to have the drivers/of/ code handling the
> > > mapping intelligently like powerpc currently does.
> > > 
> > > g.
> > > 
> > 
> > Any additional comments (ACKs, NACKs, etc) on the patches?  If I
> > need to rework it (or them), I can certainly make the patch
> > description longer.
> 
> Fine with me, but you could make the "mapping" function an inline as
> well. While at it, some sensible changelog would be helpful :)
> 
> Thanks,
> 
> 	tglx

Hm, inlining it would require some additional x86 #ifdefs in
include/linux/of_irq.h (where the mapping function is declared).  You'd
prefer that?


--
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/