linux-kernel - Re: [PATCH -next] debugfs: add missing #ifdef HAS

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Date:	Tue, 3 Jan 2012 16:44:52 -0800
From:	Greg KH <greg@...ah.com>
To:	Heiko Carstens <heiko.carstens@...ibm.com>
Cc:	Greg Kroah-Hartman <gregkh@...e.de>, linux-kernel@...r.kernel.org,
	Alessandro Rubini <rubini@...dd.com>
Subject: Re: [PATCH -next] debugfs: add missing #ifdef HAS_IOMEM

On Tue, Dec 27, 2011 at 03:08:28PM +0100, Heiko Carstens wrote:
> "debugfs: add tools to printk 32-bit registers" adds new functions which rely
> on IOMEM functionality which is not present on all architectures and therefore
> result in compile errors:
> 
> fs/debugfs/file.c: In function 'debugfs_print_regs32':
> fs/debugfs/file.c:561:7: error: implicit declaration of function 'readl' [-Werror=implicit-function-declaration]

Who does not have readl()?  Surely there should be a .h file we are just
missing to include?

> Add an #ifdef CONFIG_HAS_IOMEM to fix this

I guess this is ok, thanks for the patch.

greg k-h
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