linux-kernel - Re: [PATCH 08/21] NTB: declare unused variables

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Date:	Mon, 21 Jan 2013 10:25:52 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Jon Mason <jon.mason@...el.com>
Cc:	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	Dave Jiang <dave.jiang@...el.com>,
	Nicholas Bellinger <nab@...ux-iscsi.org>
Subject: Re: [PATCH 08/21] NTB: declare unused variables

On Mon, Jan 21, 2013 at 10:50:55AM -0700, Jon Mason wrote:
> On Sun, Jan 20, 2013 at 03:42:28PM -0800, Greg KH wrote:
> > On Sat, Jan 19, 2013 at 02:02:22AM -0700, Jon Mason wrote:
> > > Tag pci_device_id in ntb_pci_probe as unused function parameters.  This
> > > corrects issues found by 'EXTRA_CFLAGS=-W'.
> > 
> > Why would you build the kernel with that option?  This isn't needed, so
> 
> Per Documentation/SubmitChecklist:
> 
> 22: Newly-added code has been compiled with `gcc -W' (use "make
>     EXTRA_CFLAGS=-W").  This will generate lots of noise, but is good for
>     finding bugs like "warning: comparison between signed and unsigned".
> 
> 
> I was attempting to comply with that suggestion.  If this is
> unnecessary, then I can toss these, but I don't really see them
> hurting anything.

It's messy and unneeded, so I'd not recommend using it.  As the
checklist says, it generates a lot of noise, and is good for finding
real bugs, this isn't a "real" bug at all.

> Same goes for the other 2 patches found via 'EXTRA_CFLAGS=-W'.

Understood, I've not applied them either :)

thanks,

greg k-h
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