[src/trunk]: src/sys/kern micro-optimisation - if we're going to return 0, do...

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

details:   https://anonhg.NetBSD.org/src/rev/713e63fd4f62
branches:  trunk
changeset: 558676:713e63fd4f62
user:      dan <dan%NetBSD.org@localhost>
date:      Sun Feb 22 01:00:41 2004 +0000

description:
micro-optimisation - if we're going to return 0, do so before doing
other unnecessary work

diffstat:

 sys/kern/vfs_bio.c |  10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diffs (34 lines):

diff -r c9b1ad735820 -r 713e63fd4f62 sys/kern/vfs_bio.c
--- a/sys/kern/vfs_bio.c        Sun Feb 22 00:26:43 2004 +0000
+++ b/sys/kern/vfs_bio.c        Sun Feb 22 01:00:41 2004 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: vfs_bio.c,v 1.117 2004/02/19 03:56:30 atatat Exp $     */
+/*     $NetBSD: vfs_bio.c,v 1.118 2004/02/22 01:00:41 dan Exp $        */
 
 /*-
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -81,7 +81,7 @@
 #include "opt_softdep.h"
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.117 2004/02/19 03:56:30 atatat Exp $");
+__KERNEL_RCSID(0, "$NetBSD: vfs_bio.c,v 1.118 2004/02/22 01:00:41 dan Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -430,12 +430,12 @@
 
        LOCK_ASSERT(simple_lock_held(&bqueue_slock));
 
+       if (bufmem < bufmem_lowater)
+               return 0;
+
        TAILQ_FOREACH(bp, &bufqueues[BQ_AGE], b_freelist)
                ninvalid += bp->b_bufsize;
 
-       if (bufmem < bufmem_lowater)
-               return 0;
-
        pagedemand = uvmexp.freetarg - uvmexp.free;
        if (pagedemand < 0)
                return ninvalid;