pmap: prefer memcpy over bcopy
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Authored by brooks on Jun 19 2026, 9:27 PM.

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emaste
jhb
imp
kib
andrew
manu

Group Reviewers

cheri

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rG2ee2ef607f60: pmap: prefer memcpy over bcopy

Summary

Alter pmap_copy_page(s) to use memcpy rather than the deprecated bcopy.
We'll be adding non-provenance preserving versions for CHERI support and
wouod like to avoid introducing variants of deprecated APIs.

Suggested by: emaste
Sponsored by: Innovate UK

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rG FreeBSD src repository

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Buildable 74033
Build 70916: arc lint + arc unit

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brooks created this revision.Jun 19 2026, 9:27 PM

Herald added a reviewer: andrew. · View Herald TranscriptJun 19 2026, 9:27 PM

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brooks requested review of this revision.Jun 19 2026, 9:27 PM

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Harbormaster completed remote builds in B74033: Diff 180109.Jun 19 2026, 9:27 PM

brooks added a child revision: D57688: uiomove_*: centralize the copy function selection.Jun 19 2026, 9:27 PM

amd64 is fine, but there are tons of bcopy use in amd64/amd64/*.c. Why is it fine for them to stay with bcopy? Or put it differently, why amd64 is affected at all?

This revision is now accepted and ready to land.Jun 20 2026, 11:01 AM

In D57687#1322718, @kib wrote:

amd64 is fine, but there are tons of bcopy use in amd64/amd64/*.c. Why is it fine for them to stay with bcopy? Or put it differently, why amd64 is affected at all?

My aim was to eliminate bcopy in pmap_copy_page(s) in a consistent way. It seemed appropriate to replace the small number of remaining bcopies in the same file.