linux-kernel - Re: commit 45cd8d8e -- why?

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Message-Id: <20070427214923.74c504d9.akpm@linux-foundation.org>
Date:	Fri, 27 Apr 2007 21:49:23 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Roland Dreier <rdreier@...co.com>
Cc:	gregkh@...e.de, linux-kernel@...r.kernel.org,
	Tejun Heo <htejun@...il.com>
Subject: Re: commit 45cd8d8e -- why?

On Fri, 27 Apr 2007 19:50:19 -0700 Roland Dreier <rdreier@...co.com> wrote:

> The changelog says:
> 
>     fs/sysfs/bin.c: In function 'read':
>     fs/sysfs/bin.c:77: warning: format '%zd' expects type 'signed size_t', but argument 4 has type 'int'
> 
> but the signature of the function read() is
> 
>     read(struct file * file, char __user * userbuf, size_t count, loff_t * off)
> 
> and git blame seems to show it was always thus -- ie count was always size_t.
> 
> And now on x86-64 and ia64 with gcc 4.1 at least, I get:
> 
>     fs/sysfs/bin.c: In function 'read':
>     fs/sysfs/bin.c:62: warning: format '%d' expects type 'int', but argument 4 has type 'size_t'

Some patches landed out of order.  In Greg's tree (with Tejun's patches)
`count' is a local variable (not an incoming arg) of type `int'.

So this patch was against Tejun's stuff, not against mainline.

I'd have picked that up, but I went and assumed that it was a victim of the
new dev_dbg() printk arg checking stuff.  Ho hum.

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