tree 8a33017b7cacf7905dc0c2a85c6b64d283c51610
parent 34dc63a5fb9b7f5dcb49f61552226c6314f347f6
author Christoph Hellwig <hch@lst.de> 1561453295 +0200
committer Geert Uytterhoeven <geert@linux-m68k.org> 1561972620 +0200

m68k: Implement arch_dma_prep_coherent()

When we remap memory as non-cached, to be used as a DMA coherent buffer,
we should writeback all cache and invalidate the cache lines so that we
make sure we have a clean slate.  Implement this using the cache_push()
helper.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>