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

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Message-ID: <20120104004823.GC23916@ZenIV.linux.org.uk>
Date:	Wed, 4 Jan 2012 00:48:23 +0000
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Greg KH <greg@...ah.com>
Cc:	Heiko Carstens <heiko.carstens@...ibm.com>,
	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, Jan 03, 2012 at 04:44:52PM -0800, Greg KH wrote:
> 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?

s390, uml, etc.  What the hell is that kind of stuff doing in fs/*/*, anyway?
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