linux-kernel - Re: [PATCH 15/19] sunrpc: don't warn for unused variable 'buf'

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Message-ID: <20130128231803.GG5677@pad.fieldses.org>
Date:	Mon, 28 Jan 2013 18:18:03 -0500
From:	"J. Bruce Fields" <bfields@...hat.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Russell King - ARM Linux <linux@....linux.org.uk>,
	"Myklebust, Trond" <Trond.Myklebust@...app.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-nfs@...r.kernel.org" <linux-nfs@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 15/19] sunrpc: don't warn for unused variable 'buf'

On Sat, Jan 26, 2013 at 01:34:56PM +0000, Arnd Bergmann wrote:
> On Saturday 26 January 2013, Russell King - ARM Linux wrote:
> > On Fri, Jan 25, 2013 at 11:45:25PM +0000, Arnd Bergmann wrote:
> > > On Friday 25 January 2013, Myklebust, Trond wrote:
> > > > > -----Original Message-----
> > > > > From: Arnd Bergmann [mailto:arnd@...db.de]
> > > > > Marking it as __maybe_unused avoids a harmless gcc warning.
> > > > 
> > > > Alternatively, just declare it using the RPC_IFDEBUG() macro.
> > > 
> > > Right, makes sense: that's more consistent with other functions
> > > doing the same thing. Thanks for taking a look.
> > 
> > NAK.
> > 
> > There is already a fix queued up as a result of a previous report I
> > sent, but for some reason (which I didn't question) it was decided
> > not to queue it for -rc.
> > 
> > See Bruce's reply on lkml: 20130108212816.GA24572@...ldses.org

Apologies, I've seen so many "stop sending me post-rc1 patches that
don't fix serious crashes!" flames.

I guess obviousl compile fixes should be an exception--if nothing else
it'd save a lot of duplicated work as this is something like the 3rd
patch I've seen for this.

--b.

> 
> Ok, makes sense. Then again, if that fix is queued for 3.9, maybe
> it still makes sense to take the simpler fix into 3.8, and remove
> it in 3.9 along with the other instances of RPC_IFDEBUG.


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