arm64: Reduce the use of DMAMAP_COHERENT
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Authored by andrew on Mar 28 2025, 5:16 PM.

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manu

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arm64

Summary

The coherent busdma implementation doesn't need to set DMAMAP_COHERENT.
It is only used in cacheline_bounce which is unused there.

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rG FreeBSD src repository

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Buildable 63184
Build 60068: arc lint + arc unit

andrew requested review of this revision.Mar 28 2025, 5:16 PM

ehem_freebsd_m5p.com added inline comments.

sys/arm64/arm64/busdma_bounce.c
105	Why is `DMAMAP_COHERENT` being renamed here? This seems an okay idea, but if you're going to rename all the other uses should also be modified. Yet instead you have the new `#define` below so this doesn't seem useful as you've got a halfway done job.
364–368	Since both of these are now single-line, I would remove the brackets while you're at it.