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@arm.linux.org.uk>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/linux/io.h b/include/linux/io.h
index c244a0cc9319..09d351236379 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);