CVS commit: src/sys/arch/aarch64/aarch64

["Taylor R Campbell" <riastradh%netbsd.org@localhost>]

Module Name:    src
Committed By:   riastradh
Date:           Thu Feb 23 14:54:57 UTC 2023

Modified Files:
        src/sys/arch/aarch64/aarch64: cpuswitch.S locore.S

Log Message:
aarch64: Add missing barriers in cpu_switchto.

Details in comments.

Note: This is a conservative change that inserts a barrier where
there was a comment saying none is needed, which is probably correct.
The goal of this change is to systematically add barriers to be
confident in correctness; subsequent changes may remove some bariers,
as an optimization, with an explanation of why each barrier is not
needed.

PR kern/57240

XXX pullup-9
XXX pullup-10


To generate a diff of this commit:
cvs rdiff -u -r1.39 -r1.40 src/sys/arch/aarch64/aarch64/cpuswitch.S
cvs rdiff -u -r1.90 -r1.91 src/sys/arch/aarch64/aarch64/locore.S

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.