| Date | Sun, 2 Apr 2023 12:22:20 +0530 | Subject | Re: [PATCH 13/21] arc: dma-mapping: skip invalidating before bidirectional DMA | From | Vineet Gupta <> |
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CC Shahab
On 3/27/23 17:43, Arnd Bergmann wrote: > From: Arnd Bergmann<arnd@arndb.de> > > Some architectures that need to invalidate buffers after bidirectional > DMA because of speculative prefetching only do a simpler writeback > before that DMA, while architectures that don't need to do the second > invalidate tend to have a combined writeback+invalidate before the > DMA. > > arc is one of the architectures that does both, which seems unnecessary. > > Change it to behave like arm/arm64/xtensa instead, and use just a > writeback before the DMA when we do the invalidate afterwards. > > Signed-off-by: Arnd Bergmann<arnd@arndb.de>
Reviewed-by: Vineet Gupta <vgupta@kernel.org>
Shahab can you give this a spin on hsdk - run glibc testsuite over ssh and make sure nothing strange happens.
Thx, -Vineet
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