[src/trunk]: src/sys/kern biodone2(): don't acquire kernel_lock for anybody a...

[ad <ad%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b96a234d33e6
branches:  trunk
changeset: 467210:b96a234d33e6
user:      ad <ad%NetBSD.org@localhost>
date:      Fri Jan 17 19:33:14 2020 +0000

description:
biodone2(): don't acquire kernel_lock for anybody anymore.

diffstat:

 sys/kern/vfs_bio.c |  6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diffs (30 lines):

diff -r 03d2084c37ec -r b96a234d33e6 sys/kern/vfs_bio.c
--- a/sys/kern/vfs_bio.c        Fri Jan 17 19:30:51 2020 +0000
+++ b/sys/kern/vfs_bio.c        Fri Jan 17 19:33:14 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vfs_bio.c,v 1.286 2019/12/31 13:07:13 ad Exp $ */
+/*     $NetBSD: vfs_bio.c,v 1.287 2020/01/17 19:33:14 ad Exp $ */
 
 /*-
  * Copyright (c) 2007, 2008, 2009, 2019 The NetBSD Foundation, Inc.
@@ -123,7 +123,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.286 2019/12/31 13:07:13 ad Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.287 2020/01/17 19:33:14 ad Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_bufcache.h"
@@ -1666,11 +1666,9 @@
 
                /* Note callout done, then call out. */
                KASSERT(!cv_has_waiters(&bp->b_done));
-               KERNEL_LOCK(1, NULL);           /* XXXSMP */
                bp->b_iodone = NULL;
                mutex_exit(bp->b_objlock);
                (*callout)(bp);
-               KERNEL_UNLOCK_ONE(NULL);        /* XXXSMP */
        } else if (ISSET(bp->b_flags, B_ASYNC)) {
                /* If async, release. */
                BIOHIST_LOG(biohist, "async", 0, 0, 0, 0);