asm-generic: add MMU variants of io.h functions (f1ecc698) · Commits · 戴 / test

Some of the implementations, in particular the ioremap variants, in asm-generic/io.h are for systems without an MMU. In order to be able to use the generic header file for systems with an MMU, this patch wraps these implementations in checks for CONFIG_MMU. Tested on OpenRISC. Signed-off-by:

Jonas Bonn <jonas@southpole.se> Cc: liqin.chen@sunplusct.com Cc: gxt@mprc.pku.edu.cn Acked-by:

Mike Frysinger <vapier@gentoo.org> Acked-by:

Arnd Bergmann <arnd@arndb.de>

include/asm-generic/io.h

+6 −1

Original line number	Diff line number	Diff line
		@@ -307,7 +307,11 @@ static inline void *phys_to_virt(unsigned long address)

		/*
		* Change "struct page" to physical address.
		*
		* This implementation is for the no-MMU case only... if you have an MMU
		* you'll need to provide your own definitions.
		*/
		#ifndef CONFIG_MMU
		static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
		{
		return (void __iomem*) (unsigned long)offset;
		@@ -326,6 +330,7 @@ static inline void __iomem *ioremap(phys_addr_t offset, unsigned long size)
		static inline void iounmap(void *addr)
		{
		}
		#endif /* CONFIG_MMU */

		#ifndef CONFIG_GENERIC_IOMAP
		static inline void __iomem *ioport_map(unsigned long port, unsigned int nr)
		@@ -342,7 +347,7 @@ extern void ioport_unmap(void __iomem *p);
		#endif /* CONFIG_GENERIC_IOMAP */

		#define xlate_dev_kmem_ptr(p) p
		#define xlate_dev_mem_ptr(p) ((void *) (p))
		#define xlate_dev_mem_ptr(p) __va(p)

		#ifndef virt_to_bus
		static inline unsigned long virt_to_bus(volatile void *address)

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