linux-kernel - Re: [PATCH] fix calls to request

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Message-ID: <20081211044901.GL28946@ZenIV.linux.org.uk>
Date:	Thu, 11 Dec 2008 04:49:01 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Nguyen Anh Quynh <aquynh@...il.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Kuniyasu Suzaki <k.suzaki@...t.go.jp>
Subject: Re: [PATCH] fix calls to request_module()

On Wed, Dec 10, 2008 at 08:14:55PM -0800, Andrew Morton wrote:
> On Thu, 11 Dec 2008 04:01:18 +0000 Al Viro <viro@...IV.linux.org.uk> wrote:
> 
> > On Thu, Dec 11, 2008 at 12:35:21PM +0900, Nguyen Anh Quynh wrote:
> > > Hi,
> > > 
> > > The request_module() function should always have the 1st param as a
> > > format argument. So for example, request_module("i2c-powermac") should
> > > be called as request_module("%s", "i2c-powermac"). Otherwise, new gcc
> > > like gcc 4.3.2 on Ubuntu 8.10 would spit out a lot of warnings. This
> > > patch fixes them all in linus-git tree.
> > 
> > ... and it doesn't address the underlying problems at all.  A string literal
> > without a single % in it is a perfectly sane and valid format.  _Why_ are
> > we getting these warning?
> 
> extern int request_module(const char * name, ...) __attribute__ ((format (printf, 1, 2)));
> 
> ?

... and request_module("i2c-powermac") should be perfectly valid, shouldn't it?
I mean, I do not believe that any gcc version would start spewing warnings
of
	printf("-- \n");
and its ilk...
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