Module Name: src
Committed By: riastradh
Date: Sat Apr 9 23:36:22 UTC 2022
Modified Files:
src/sys/arch/alpha/alpha: pmap.c
Log Message:
alpha: Omit needless membar in pmap_reference.
If the pmap is published enough for us to obtain a reference to it
then there's no membar needed. If it's not then something else is
wrong and we can't use pmap_reference here anyway. Membars are
needed only on the destruction side to make sure all use, by any
thread, happens-before all freeing in the last user thread.
To generate a diff of this commit:
cvs rdiff -u -r1.305 -r1.306 src/sys/arch/alpha/alpha/pmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/alpha/alpha/pmap.c
diff -u src/sys/arch/alpha/alpha/pmap.c:1.305 src/sys/arch/alpha/alpha/pmap.c:1.306
--- src/sys/arch/alpha/alpha/pmap.c:1.305 Sat Mar 12 15:32:31 2022
+++ src/sys/arch/alpha/alpha/pmap.c Sat Apr 9 23:36:22 2022
@@ -1,4 +1,4 @@
-/* $NetBSD: pmap.c,v 1.305 2022/03/12 15:32:31 riastradh Exp $ */
+/* $NetBSD: pmap.c,v 1.306 2022/04/09 23:36:22 riastradh Exp $ */
/*-
* Copyright (c) 1998, 1999, 2000, 2001, 2007, 2008, 2020
@@ -135,7 +135,7 @@
#include <sys/cdefs.h> /* RCS ID & Copyright macro defns */
-__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.305 2022/03/12 15:32:31 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: pmap.c,v 1.306 2022/04/09 23:36:22 riastradh Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@@ -1706,7 +1706,6 @@ pmap_reference(pmap_t pmap)
newcount = atomic_inc_uint_nv(&pmap->pm_count);
KASSERT(newcount != 0);
- PMAP_MP(membar_enter());
}
/*
