[src/trunk]: src/sys/net Optimize if_get_byindex by adding __predict_true

[ozaki-r <ozaki-r%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/9221ca4b5e25
branches:  trunk
changeset: 345520:9221ca4b5e25
user:      ozaki-r <ozaki-r%NetBSD.org@localhost>
date:      Tue May 31 04:05:01 2016 +0000

description:
Optimize if_get_byindex by adding __predict_true

diffstat:

 sys/net/if.c |  8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diffs (29 lines):

diff -r 04096f7c6280 -r 9221ca4b5e25 sys/net/if.c
--- a/sys/net/if.c      Tue May 31 03:57:04 2016 +0000
+++ b/sys/net/if.c      Tue May 31 04:05:01 2016 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if.c,v 1.336 2016/05/16 01:16:24 ozaki-r Exp $ */
+/*     $NetBSD: if.c,v 1.337 2016/05/31 04:05:01 ozaki-r Exp $ */
 
 /*-
  * Copyright (c) 1999, 2000, 2001, 2008 The NetBSD Foundation, Inc.
@@ -90,7 +90,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if.c,v 1.336 2016/05/16 01:16:24 ozaki-r Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if.c,v 1.337 2016/05/31 04:05:01 ozaki-r Exp $");
 
 #if defined(_KERNEL_OPT)
 #include "opt_inet.h"
@@ -2215,8 +2215,8 @@
        int s;
 
        s = pserialize_read_enter();
-       ifp = (idx < if_indexlim) ? ifindex2ifnet[idx] : NULL;
-       if (ifp != NULL)
+       ifp = (__predict_true(idx < if_indexlim)) ? ifindex2ifnet[idx] : NULL;
+       if (__predict_true(ifp != NULL))
                psref_acquire(psref, &ifp->if_psref, ifnet_psref_class);
        pserialize_read_exit(s);