linux-kernel - Re: [PATCH] iomap: make PCI iomap stuff excluded when PCI isn't configured

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Message-ID: <20070211001509.GA8055@osiris.ibm.com>
Date:	Sun, 11 Feb 2007 01:15:09 +0100
From:	Heiko Carstens <heiko.carstens@...ibm.com>
To:	Tejun Heo <htejun@...il.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Martin Schwidefsky <schwidefsky@...ibm.com>,
	Jeff Garzik <jgarzik@...ox.com>, linux-kernel@...r.kernel.org,
	linux-s390@...r.kernel.org
Subject: Re: [PATCH] iomap: make PCI iomap stuff excluded when PCI isn't configured

On Sat, Feb 10, 2007 at 05:14:13PM -0500, Tejun Heo wrote:
> Heiko Carstens wrote:
> >On Sat, Feb 10, 2007 at 12:43:16PM -0500, Tejun Heo wrote:
> \>> Heiko, how about this?  Does it fix s390?
> >Unfortunately not. Now I get
> >  CC      lib/iomap.o
> >lib/iomap.c: In function 'devm_ioport_map_release':
> >lib/iomap.c:270: warning: implicit declaration of function 'ioport_unmap'
> >lib/iomap.c: In function 'devm_ioport_map':
> >lib/iomap.c:297: warning: implicit declaration of function 'ioport_map'
> >lib/iomap.c:297: warning: assignment makes pointer from integer without a cast
> 
> I think an arch needs to support ioport_map/unmap and noncoherent dma
> (just alias to coherent interface on x86/amd64) interface whether PCI is
> implemented or not.  No?

I sent a patch earlier which "fixes" at least the dma stuff by adding some
more defines to asm-generic/dma-mapping-broken.h
The patch below (on top of your latest one) makes sure s390 builds at
least again until all this got sorted out.
---

Hack to make s390 build again.

Signed-off-by: Heiko Carstens <heiko.carstens@...ibm.com>
---
 include/asm-s390/io.h |   14 ++++++++++++++
 1 file changed, 14 insertions(+)

Index: linux-2.6/include/asm-s390/io.h
===================================================================
--- linux-2.6.orig/include/asm-s390/io.h
+++ linux-2.6/include/asm-s390/io.h
@@ -61,6 +61,20 @@ static inline void * ioremap_nocache (un
 extern void iounmap(void *addr);
 
 /*
+ * FIXME: remove ioport stuff asap again.
+ */
+static inline void __iomem *ioport_map(unsigned long port, unsigned int size)
+{
+	BUG();
+	return NULL;
+}
+
+static inline void ioport_unmap(void __iomem *addr)
+{
+	BUG();
+}
+
+/*
  * IO bus memory addresses are also 1:1 with the physical address
  */
 #define virt_to_bus virt_to_phys
-
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