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dma-mapping: remove CONFIG_ARCH_NO_COHERENT_DMA_MMAP

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CONFIG_ARCH_NO_COHERENT_DMA_MMAP is now functionally identical to
!CONFIG_MMU, so remove the separate symbol.  The only difference is that
arm did not set it for !CONFIG_MMU, but arm uses a separate dma mapping
implementation including its own mmap method, which is handled by moving
the CONFIG_MMU check in dma_can_mmap so that is only applies to the
dma-direct case, just as the other ifdefs for it.

Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Geert Uytterhoeven <[email protected]>	# m68k
This commit is contained in:
Christoph Hellwig 2019-08-06 15:06:40 +03:00
commit 62fcee9a3b
7 changed files with 5 additions and 15 deletions
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3
arch/Kconfig
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@ -790,9 +790,6 @@ config COMPAT_32BIT_TIME
This is relevant on all 32-bit architectures, and 64-bit architectures
as part of compat syscall handling.
config ARCH_NO_COHERENT_DMA_MMAP
bool
config ARCH_NO_PREEMPT
bool