[PATCH] check_signature depends on CONFIG_CHECK_SIGNATURE

[Jean Delvare]

check_signature() is only available if CONFIG_CHECK_SIGNATURE has been
selected. Don't declare the function if it won't be available at link
time. That way, any failure to select CONFIG_CHECK_SIGNATURE as needed
will show up immediately at build time.

Signed-off-by: Jean Delvare <khali@xxxxxxxxxxxx>
---
 include/linux/io.h |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- linux-2.6.40-rc0.orig/include/linux/io.h	2011-05-20 10:41:02.000000000 +0200
+++ linux-2.6.40-rc0/include/linux/io.h	2011-05-20 16:00:31.000000000 +0200
@@ -63,8 +63,11 @@ void __iomem *devm_ioremap(struct device
 void __iomem *devm_ioremap_nocache(struct device *dev, resource_size_t offset,
 				    unsigned long size);
 void devm_iounmap(struct device *dev, void __iomem *addr);
+void devm_ioremap_release(struct device *dev, void *res);
+
+#ifdef CONFIG_CHECK_SIGNATURE
 int check_signature(const volatile void __iomem *io_addr,
 			const unsigned char *signature, int length);
-void devm_ioremap_release(struct device *dev, void *res);
+#endif
 
 #endif /* _LINUX_IO_H */


-- 
Jean Delvare
--
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