driver core: lift dma_default_coherent into common code

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Lift the dma_default_coherent variable from the mips architecture code
to the driver core.  This allows an architecture to sdefault all device
to be DMA coherent at run time, even if the kernel is build with support
for DMA noncoherent device.  By allowing device_initialize to set the
->dma_coherent field to this default the amount of arch hooks required
for this behavior can be greatly reduced.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

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This commit is contained in:

Christoph Hellwig 2021-02-10 10:56:39 +01:00 • committed by Thomas Bogendoerfer

parent 14ac09a65e

commit 6d4e9a8efe

13 changed files with 14 additions and 39 deletions

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1

arch/mips/Kconfig

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2

arch/mips/alchemy/common/setup.c

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22

arch/mips/include/asm/dma-coherence.h

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4

arch/mips/kernel/setup.c

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2

arch/mips/mm/c-r4k.c

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1

arch/mips/mm/dma-noncoherent.c

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2

arch/mips/mti-malta/malta-setup.c

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2

arch/mips/pci/pci-alchemy.c

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arch/mips/pistachio/init.c

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6

drivers/base/core.c

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5

include/linux/dma-map-ops.h

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3

kernel/dma/Kconfig

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2

kernel/dma/mapping.c

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