[src/trunk]: src/sys/external/bsd/drm2/include/linux Don't call kpause(9) if ...

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

details:   https://anonhg.NetBSD.org/src/rev/5445be4869d9
branches:  trunk
changeset: 333179:5445be4869d9
user:      nonaka <nonaka%NetBSD.org@localhost>
date:      Wed Oct 22 11:41:34 2014 +0000

description:
Don't call kpause(9) if cold.

diffstat:

 sys/external/bsd/drm2/include/linux/sched.h |  9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)

diffs (28 lines):

diff -r 4ac30a1ea648 -r 5445be4869d9 sys/external/bsd/drm2/include/linux/sched.h
--- a/sys/external/bsd/drm2/include/linux/sched.h       Wed Oct 22 11:11:40 2014 +0000
+++ b/sys/external/bsd/drm2/include/linux/sched.h       Wed Oct 22 11:41:34 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: sched.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $      */
+/*     $NetBSD: sched.h,v 1.4 2014/10/22 11:41:34 nonaka Exp $ */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -51,12 +51,17 @@
 {
        int start, end;
 
+       if (cold) {
+               DELAY(timeout);
+               return 0;
+       }
+
        start = hardclock_ticks;
        /* XXX Integer truncation...not likely to matter here.  */
        (void)kpause("loonix", false /*!intr*/, timeout, NULL);
        end = hardclock_ticks;
 
-       return (end - start);
+       return (end - start) > 0 ? (end - start) : 0;
 }
 
 #endif  /* _LINUX_SCHED_H_ */