Date: Fri, 10 Jul 1998 13:07:19 +0200 (CEST) From: Stefan Eggers <seggers@semyam.dinoco.de> To: FreeBSD-gnats-submit@FreeBSD.ORG Cc: seggers@semyam.dinoco.de Subject: kern/7233: unnecessary code in -current VM Message-ID: <199807101107.NAA07005@semyam.dinoco.de>
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>Number: 7233
>Category: kern
>Synopsis: unnecessary code in -current VM
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: change-request
>Submitter-Id: current-users
>Arrival-Date: Fri Jul 10 07:30:01 PDT 1998
>Last-Modified:
>Originator: Stefan Eggers
>Organization:
none
>Release: FreeBSD 2.2.6-STABLE i386
>Environment:
The -current VM source.
>Description:
While reading the VM source for -current I found an unneces-
sary test in an if/else construct. If something is known to be not 0
it is not 0 - no need to test again. ;-)
It might save a few bytes in the code and also a few cycles
once in a while I think. At least it is easier to read w/o rechecking
the condition.
>How-To-Repeat:
N/A
>Fix:
Index: vm_pageout.c
===================================================================
RCS file: /usr2/FreeBSD/CVSROOT/src/sys/vm/vm_pageout.c,v
retrieving revision 1.122
diff -u -r1.122 vm_pageout.c
--- vm_pageout.c 1998/06/02 05:39:13 1.122
+++ vm_pageout.c 1998/07/10 11:00:35
@@ -722,7 +722,7 @@
*/
if (m->dirty == 0) {
vm_page_test_dirty(m);
- } else if (m->dirty != 0) {
+ } else {
m->dirty = VM_PAGE_BITS_ALL;
}
>Audit-Trail:
>Unformatted:
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