linux-kernel - Re: [Patch 09/16] Remove unnecessary kmalloc casts in the pci subsystem.

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Message-ID: <20070731174755.GA8592@suse.de>
Date:	Tue, 31 Jul 2007 10:47:55 -0700
From:	Greg KH <gregkh@...e.de>
To:	Andreas Schwab <schwab@...e.de>
Cc:	WANG Cong <xiyou.wangcong@...il.com>,
	Satyam Sharma <satyam@...radead.org>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	jack@...keye.stone.uk.eu.org, linux-kernel@...r.kernel.org,
	trivial@...nel.org
Subject: Re: [Patch 09/16] Remove unnecessary kmalloc casts in the pci
	subsystem.

On Tue, Jul 31, 2007 at 06:20:29PM +0200, Andreas Schwab wrote:
> Greg KH <gregkh@...e.de> writes:
> 
> > On Tue, Jul 31, 2007 at 10:46:19PM +0800, WANG Cong wrote:
> >> However, I think using resource_size_t is a bit better than unsigned long,
> >> so that we don't need to check the defination of it.
> >> 
> >> - res->start = (unsigned long)kmalloc(*size, GFP_KERNEL);
> >> + res->start = (resource_size_t)kmalloc(*size, GFP_KERNEL);
> >> 
> >> Is this change OK?
> >
> > Yes, that is the proper cast to have here.
> 
> It will generate a warning when resoure_size_t is 64bit on a 32bit arch.

How?  And if so, what should the proper cast be?

thanks,

greg k-h
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