xtensa: support DMA_ATTR_NO_KERNEL_MAPPING attribute

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An application that doesn't need kernel mapping of the DMA memory it
allocates may specify DMA_ATTR_NO_KERNEL_MAPPING attribute to allocation
function. Support this attribute and return address of the first struct
page that covers the allocation.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

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Max Filippov 2018-02-14 16:12:54 -08:00

parent 3f2bbf443e

commit adbfa4e6f9

1 changed files with 8 additions and 2 deletions

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arch/xtensa/kernel/pci-dma.c

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