bus: Add a new IVAR accessor to check for the existence of an IVAR
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Authored by jhb on Feb 18 2026, 3:48 PM.

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rGcb5a0eb05310: bus: Add a new IVAR accessor to check for the existence of an IVAR

Summary

<varp>_has_<var> returns true if the given IVAR can be read.

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rG FreeBSD src repository

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Buildable 70755
Build 67638: arc lint + arc unit

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jhb requested review of this revision.Feb 18 2026, 3:48 PM

jhb created this revision.

Harbormaster completed remote builds in B70755: Diff 172164.Feb 18 2026, 3:48 PM

jhb added a parent revision: D55351: sdiob: Forward-declare struct sdio_func.Feb 18 2026, 3:48 PM

jhb added a child revision: D55353: bus: Add __BUS_ACCESSOR_DEFAULT.

Might want to note this determines this by reading the value.... though maybe not: all ivars are supposed to be O(1) to compute.

This revision is now accepted and ready to land.Feb 18 2026, 4:23 PM

The part that I think is potentially bizarre is that in theory you could have write-only IVARs, but in practice I think we have RO and RW IVARs, not write-only.

Closed by commit rGcb5a0eb05310: bus: Add a new IVAR accessor to check for the existence of an IVAR (authored by jhb). · Explain WhyFeb 24 2026, 8:33 PM

This revision was automatically updated to reflect the committed changes.

jhb added a commit: rGcb5a0eb05310: bus: Add a new IVAR accessor to check for the existence of an IVAR.

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sys/

bus.h

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Diff 172164

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