[src/trunk]: src/sys/kern Use brelsel while the bufcache_lock is held rather ...

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

details:   https://anonhg.NetBSD.org/src/rev/50d15f91fc73
branches:  trunk
changeset: 352215:50d15f91fc73
user:      skrll <skrll%NetBSD.org@localhost>
date:      Tue Mar 21 10:46:49 2017 +0000

description:
Use brelsel while the bufcache_lock is held rather than dropping it
and re-taking / dropping it in brelse

diffstat:

 sys/kern/vfs_bio.c |  6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)

diffs (28 lines):

diff -r 8bb062bc76d0 -r 50d15f91fc73 sys/kern/vfs_bio.c
--- a/sys/kern/vfs_bio.c        Tue Mar 21 10:39:52 2017 +0000
+++ b/sys/kern/vfs_bio.c        Tue Mar 21 10:46:49 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vfs_bio.c,v 1.270 2017/03/18 05:45:48 riastradh Exp $  */
+/*     $NetBSD: vfs_bio.c,v 1.271 2017/03/21 10:46:49 skrll Exp $      */
 
 /*-
  * Copyright (c) 2007, 2008, 2009 The NetBSD Foundation, Inc.
@@ -123,7 +123,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.270 2017/03/18 05:45:48 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.271 2017/03/21 10:46:49 skrll Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_bufcache.h"
@@ -1230,8 +1230,8 @@
                if (allocbuf(bp, size, preserve)) {
                        mutex_enter(&bufcache_lock);
                        LIST_REMOVE(bp, b_hash);
+                       brelsel(bp, BC_INVAL);
                        mutex_exit(&bufcache_lock);
-                       brelse(bp, BC_INVAL);
                        return NULL;
                }
        }