It's very good to me, thanks.
Guan Xuetao
On Sat, 2011-07-02 at 19:36 +0200, Jonas Bonn wrote:
> 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@xxxxxxxxxxxx>
> Cc: vapier@xxxxxxxxxx
> Cc: liqin.chen@xxxxxxxxxxxxx
> Cc: gxt@xxxxxxxxxxxxxxx
> ---
> include/asm-generic/io.h | 7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)
>
> diff --git a/include/asm-generic/io.h b/include/asm-generic/io.h
> index e0ffa3d..a1caf2d 100644
> --- a/include/asm-generic/io.h
> +++ b/include/asm-generic/io.h
> @@ -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)
--
To unsubscribe from this list: send the line "unsubscribe linux-arch" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
