arm: Remove an unneeded isb from the generic timer
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Authored by andrew on Mar 6 2025, 6:11 PM.

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imp

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ARM
arm64

Summary

This is needed to synchronise a read of the timer register with an
earlier memory read to signal the register needs to be read. As this
doesn't appear to be the case on FreeBSD we can remove the barrier.

Diff Detail

Repository

rG FreeBSD src repository

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Lint Skipped

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Build Status

Buildable 62795
Build 59679: arc lint + arc unit

Event Timeline

andrew created this revision.Mar 6 2025, 6:11 PM

Herald added a subscriber: imp. · View Herald TranscriptMar 6 2025, 6:11 PM

andrew requested review of this revision.Mar 6 2025, 6:11 PM

Harbormaster completed remote builds in B62795: Diff 151968.Mar 6 2025, 6:11 PM

andrew added a child revision: D49262: arm: Have get_cntxct_a64_unstable use get_cntxct.Mar 6 2025, 6:11 PM

Revision Contents
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sys/

arm/

generic_timer.c

2 lines

Diff 151968

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sys/arm/arm/generic_timer.c

arm: Remove an unneeded isb from the generic timerNeeds ReviewPublicActions