linux-kernel - Re: [Patch] Shut up warnings from files under drivers/

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Message-ID: <479B1D30.20501@garzik.org>
Date:	Sat, 26 Jan 2008 06:44:48 -0500
From:	Jeff Garzik <jeff@...zik.org>
To:	WANG Cong <xiyou.wangcong@...il.com>
CC:	Greg KH <gregkh@...e.de>, LKML <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>
Subject: Re: [Patch] Shut up warnings from files under drivers/

WANG Cong wrote:
> For example, the defination of __devexit_p:
> 
> #if defined(MODULE) || defined(CONFIG_HOTPLUG)
> #define __devexit_p(x) x
> #else
> #define __devexit_p(x) NULL
> #endif
> 
> If !(defined(MODULE) || defined(CONFIG_HOTPLUG)), __devexit_p
> is just a NULL pointer, thus 'x' may be unused although defined.


  ...and that's the purpose of the __devexit marker on the code itself.

	Jeff


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