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[ARM] dma-mapping: improve type-safeness of DMA translations

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OMAP at least gets the return type(s) for the DMA translation functions
wrong, which can lead to subtle errors.  Avoid this by moving the DMA
translation functions to asm/dma-mapping.h, and converting them to
inline functions.

Fix the OMAP DMA translation macros to use the correct argument and
result types.

Also, remove the unnecessary casts in dmabounce.c.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King
2008-08-10 12:10:49 +01:00
committed by Russell King
parent 492c71dd54
commit 98ed7d4b1a
4 changed files with 60 additions and 36 deletions
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13
arch/arm/plat-omap/include/mach/memory.h
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@ -76,13 +76,14 @@
(dma_addr_t)virt_to_lbus(page_address(page)) : \
(dma_addr_t)__virt_to_bus(page_address(page));})
#define __arch_dma_to_virt(dev, addr) ({is_lbus_device(dev) ? \
lbus_to_virt(addr) : \
__bus_to_virt(addr);})
#define __arch_dma_to_virt(dev, addr) ({ (void *) (is_lbus_device(dev) ? \
lbus_to_virt(addr) : \
__bus_to_virt(addr)); })
#define __arch_virt_to_dma(dev, addr) ({is_lbus_device(dev) ? \
virt_to_lbus(addr) : \
__virt_to_bus(addr);})
#define __arch_virt_to_dma(dev, addr) ({ unsigned long __addr = (unsigned long)(addr); \
(dma_addr_t) (is_lbus_device(dev) ? \
virt_to_lbus(__addr) : \
__virt_to_bus(__addr)); })
#endif /* CONFIG_ARCH_OMAP15XX */