linux-kernel - Re: [PATCH 04/06][RESEND] Fix compilation warning for drivers/input/touchscreen/htcpen.c

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Message-ID: <20090721052157.GA2605@dtor-d630.eng.vmware.com>
Date:	Mon, 20 Jul 2009 22:21:57 -0700
From:	Dmitry Torokhov <dmitry.torokhov@...il.com>
To:	Subrata Modak <subrata@...ux.vnet.ibm.com>
Cc:	Pau Oliva Fora <pof@...ack.org>, linux-input@...r.kernel.org,
	Sachin P Sant <sachinp@...ux.vnet.ibm.com>,
	David Howells <dhowells@...hat.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 04/06][RESEND] Fix compilation warning for
	drivers/input/touchscreen/htcpen.c

Hi Subrata,

On Tue, Jul 21, 2009 at 07:53:44AM +0530, Subrata Modak wrote:
> gcc 4.4.1 generates the following build warning on i386:
> 
> CC drivers/input/touchscreen/htcpen.o
> drivers/input/touchscreen/htcpen.c:50: warning: 'pnp_ids' defined but not used
> 
> Fix this by removing the static keyword when you are actually exporting
> that structure. This patch was earlier posted on 14th July 2009:
> http://lkml.org/lkml/2009/7/14/362,
> 
> Signed-off-by: Subrata Modak<subrata@...ux.vnet.ibm.com>

Umm, no, we don't export this particular structure, we are exporting
another structure referencing this. Are you compiling without module
support by any chance?

> ---
> 
> --- a/drivers/input/touchscreen/htcpen.c	2009-05-20 10:40:54.000000000 +0530
> +++ b/drivers/input/touchscreen/htcpen.c	2009-07-15 06:15:34.000000000 +0530
> @@ -47,7 +47,7 @@ static int invert_y;
>  module_param(invert_y, bool, 0644);
>  MODULE_PARM_DESC(invert_y, "If set, Y axis is inverted");
>  
> -static struct pnp_device_id pnp_ids[] = {
> +struct pnp_device_id pnp_ids[] = {
>  	{ .id = "PNP0cc0" },
>  	{ .id = "" }
>  };
> 

-- 
Dmitry
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