PR/57240 CVS commit: [netbsd-8] src/sys/arch

["Martin Husemann" <martin%netbsd.org@localhost>]

The following reply was made to PR kern/57240; it has been noted by GNATS.

From: "Martin Husemann" <martin%netbsd.org@localhost>
To: gnats-bugs%gnats.NetBSD.org@localhost
Cc: 
Subject: PR/57240 CVS commit: [netbsd-8] src/sys/arch
Date: Mon, 31 Jul 2023 14:26:26 +0000

 Module Name:	src
 Committed By:	martin
 Date:		Mon Jul 31 14:26:26 UTC 2023
 
 Modified Files:
 	src/sys/arch/alpha/alpha [netbsd-8]: locore.s multiproc.s
 	src/sys/arch/arm/cortex [netbsd-8]: a9_mpsubr.S cortex_init.S
 
 Log Message:
 Pull up following revision(s) (requested by riastradh in ticket #1859):
 
 	sys/arch/ia64/ia64/vm_machdep.c: revision 1.18
 	sys/arch/powerpc/powerpc/locore_subr.S: revision 1.67
 	sys/arch/aarch64/aarch64/locore.S: revision 1.91
 	sys/arch/mips/include/asm.h: revision 1.74
 	sys/arch/hppa/include/cpu.h: revision 1.13
 	sys/arch/arm/arm/armv6_start.S: revision 1.38
 	 (applied also to sys/arch/arm/cortex/a9_mpsubr.S,
 	 sys/arch/arm/cortex/a9_mpsubr.S,
 	 sys/arch/arm/cortex/cortex_init.S)
 	sys/arch/evbmips/ingenic/cpu_startup.S: revision 1.2
 	sys/arch/mips/mips/locore.S: revision 1.229
 	sys/arch/alpha/include/asm.h: revision 1.45
 	 (applied to sys/arch/alpha/alpha/multiproc.s)
 	sys/arch/sparc64/sparc64/locore.s: revision 1.432
 	sys/arch/vax/vax/subr.S: revision 1.42
 	sys/arch/mips/mips/locore_mips3.S: revision 1.116
 	sys/arch/ia64/ia64/machdep.c: revision 1.44
 	sys/arch/arm/arm32/cpuswitch.S: revision 1.106
 	sys/arch/sparc/sparc/locore.s: revision 1.284
 	(all via patch)
 
 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
 
 alpha: Add missing barriers in cpu_switchto.
 Details in comments.
 
 arm32: Add missing barriers in cpu_switchto.
 Details in comments.
 
 hppa: Add missing barriers in cpu_switchto.
 Not sure hppa has ever had working MULTIPROCESSOR, so maybe no
 pullups needed?
 
 ia64: Add missing barriers in cpu_switchto.
 (ia64 has never really worked, so no pullups needed, right?)
 
 mips: Add missing barriers in cpu_switchto.
 Details in comments.
 
 powerpc: Add missing barriers in cpu_switchto.
 Details in comments.
 
 sparc: Add missing barriers in cpu_switchto.
 
 sparc64: Add missing barriers in cpu_switchto.
 Details in comments.
 
 vax: Note where cpu_switchto needs barriers.
 
 Not sure vax has ever had working MULTIPROCESSOR, though, and I'm not
 even sure how to spell store-before-load barriers on VAX, so no
 functional change for now.
 
 
 To generate a diff of this commit:
 cvs rdiff -u -r1.122 -r1.122.32.1 src/sys/arch/alpha/alpha/locore.s
 cvs rdiff -u -r1.13 -r1.13.80.1 src/sys/arch/alpha/alpha/multiproc.s
 cvs rdiff -u -r1.47.8.2 -r1.47.8.3 src/sys/arch/arm/cortex/a9_mpsubr.S
 cvs rdiff -u -r1.1 -r1.1.12.1 src/sys/arch/arm/cortex/cortex_init.S
 
 Please note that diffs are not public domain; they are subject to the
 copyright notices on the relevant files.