LinuxKPI: improve hweight<n> if complie time constant
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Authored by bz on Jan 20 2026, 10:59 PM.

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rG5585c7c36518: LinuxKPI: improve hweight<n> if complie time constant
rG7e4a2b381dcb: LinuxKPI: improve hweight<n> if complie time constant

Summary

rtw89(4) uses a static_assert() with hweight<n> calls. In order to
avoid compile time errors, deal with the case when the arguments to
hweight<n> are complie time constant.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days

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rG FreeBSD src repository

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Lint Passed

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No Test Coverage

Build Status

Buildable 70031
Build 66914: arc lint + arc unit

Event Timeline

bz created this revision.Jan 20 2026, 10:59 PM

Herald added subscribers: emaste, imp. · View Herald TranscriptJan 20 2026, 10:59 PM

bz requested review of this revision.Jan 20 2026, 10:59 PM

Harbormaster completed remote builds in B70031: Diff 170161.Jan 20 2026, 10:59 PM

emaste accepted this revision.Jan 23 2026, 8:41 PM

This revision is now accepted and ready to land.Jan 23 2026, 8:41 PM

Closed by commit rG7e4a2b381dcb: LinuxKPI: improve hweight<n> if complie time constant (authored by bz). · Explain WhyJan 25 2026, 12:36 PM

This revision was automatically updated to reflect the committed changes.

bz added a commit: rG7e4a2b381dcb: LinuxKPI: improve hweight<n> if complie time constant.

bz added a commit: rG5585c7c36518: LinuxKPI: improve hweight<n> if complie time constant.Feb 27 2026, 2:30 AM

Revision Contents
Changeset List

Path

Size

sys/

compat/

linuxkpi/

common/

include/

linux/

bitops.h

12 lines

Diff 170161

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sys/compat/linuxkpi/common/include/linux/bitops.h

LinuxKPI: improve hweight<n> if complie time constantClosedPublicActions