linux-kernel - [PATCH] Provide dummy devm_ioport_* if !HAS

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Date:	Fri, 30 Mar 2007 12:00:22 +0100
From:	Russell King <rmk+lkml@....linux.org.uk>
To:	linux-kernel@...r.kernel.org,
	Andrew Morton <akpm@...ux-foundation.org>,
	Al Viro <viro@....linux.org.uk>
Subject: [PATCH] Provide dummy devm_ioport_* if !HAS_IOPORT

Provide an dummy implementation of devm_ioport_map() and
devm_ioport_unmap() to allow drivers (eg, pata_platform) to build for
platforms where CONFIG_NO_IOPORT is selected.

Signed-off-by: Russell King <rmk+kernel@....linux.org.uk>
---
 include/linux/io.h |   14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/include/linux/io.h b/include/linux/io.h
index c244a0c..8cf8df6 100644
--- a/include/linux/io.h
+++ b/include/linux/io.h
@@ -33,9 +33,22 @@ int ioremap_page_range(unsigned long addr, unsigned long end,
 /*
  * Managed iomap interface
  */
+#ifdef CONFIG_HAS_IOPORT
 void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
 			       unsigned int nr);
 void devm_ioport_unmap(struct device *dev, void __iomem *addr);
+#else
+static inline void __iomem * devm_ioport_map(struct device *dev,
+					     unsigned long port,
+					     unsigned int nr)
+{
+	return NULL;
+}
+
+static inline void devm_ioport_unmap(struct device *dev, void __iomem *addr)
+{
+}
+#endif
 
 void __iomem * devm_ioremap(struct device *dev, unsigned long offset,
 			    unsigned long size);

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:
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