Messages in this thread | | | From | Shahab Vahedi <> | Subject | Re: [PATCH 13/21] arc: dma-mapping: skip invalidating before bidirectional DMA | Date | Tue, 4 Apr 2023 08:27:08 +0000 |
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On 4/2/23 08:52, Vineet Gupta wrote: > 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
On it. -- Shahab
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