diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2009-10-31 15:58:30 +0000 |
|---|---|---|
| committer | Gary King <gking@nvidia.com> | 2010-04-05 14:11:06 -0700 |
| commit | 7a272f5b1bd3582dea9e20f1ddff45d7ef485337 (patch) | |
| tree | 4720b3939faf28b2cc16c5ec7f31c19be73a9d6b /arch/arm/include/asm | |
| parent | 9256cb42cb227ffe9963db63808e3d1c97f8d1f0 (diff) | |
ARM: dma-mapping: simplify page_to_dma() and __pfn_to_bus()
The non-highmem() and the __pfn_to_bus() based page_to_dma() both
compile to the same code, so its pointless having these two different
approaches. Use the __pfn_to_bus() based version.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Tested-By: Jamie Iles <jamie@jamieiles.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm/include/asm')
| -rw-r--r-- | arch/arm/include/asm/dma-mapping.h | 10 | ||||
| -rw-r--r-- | arch/arm/include/asm/memory.h | 3 |
2 files changed, 2 insertions, 11 deletions
diff --git a/arch/arm/include/asm/dma-mapping.h b/arch/arm/include/asm/dma-mapping.h index ff46dfa68a97..5d78eb163953 100644 --- a/arch/arm/include/asm/dma-mapping.h +++ b/arch/arm/include/asm/dma-mapping.h @@ -15,20 +15,10 @@ * must not be used by drivers. */ #ifndef __arch_page_to_dma - -#if !defined(CONFIG_HIGHMEM) -static inline dma_addr_t page_to_dma(struct device *dev, struct page *page) -{ - return (dma_addr_t)__virt_to_bus((unsigned long)page_address(page)); -} -#elif defined(__pfn_to_bus) static inline dma_addr_t page_to_dma(struct device *dev, struct page *page) { return (dma_addr_t)__pfn_to_bus(page_to_pfn(page)); } -#else -#error "this machine class needs to define __arch_page_to_dma to use HIGHMEM" -#endif static inline void *dma_to_virt(struct device *dev, dma_addr_t addr) { diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index cefedf062138..37aa746bfddd 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -194,7 +194,8 @@ static inline void *phys_to_virt(unsigned long x) #ifndef __virt_to_bus #define __virt_to_bus __virt_to_phys #define __bus_to_virt __phys_to_virt -#define __pfn_to_bus(x) ((x) << PAGE_SHIFT) +#define __pfn_to_bus(x) __pfn_to_phys(x) +#define __bus_to_pfn(x) __phys_to_pfn(x) #endif static inline __deprecated unsigned long virt_to_bus(void *x) |