linux-kernel - [PATCH 7/11] UML - clocksource support

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <20070919170226.GA10191@c2.user-mode-linux.org>
Date:	Wed, 19 Sep 2007 13:02:26 -0400
From:	Jeff Dike <jdike@...toit.com>
To:	Andrew Morton <akpm@...l.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	uml-devel <user-mode-linux-devel@...ts.sourceforge.net>
Subject: [PATCH 7/11] UML - clocksource support

Add clocksource support.

Signed-off-by: Jeff Dike <jdike@...ux.intel.com>
---
 arch/um/kernel/time.c |   21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

Index: linux-2.6.20/arch/um/kernel/time.c
===================================================================
--- linux-2.6.20.orig/arch/um/kernel/time.c	2007-09-19 12:25:07.000000000 -0400
+++ linux-2.6.20/arch/um/kernel/time.c	2007-09-19 12:25:07.000000000 -0400
@@ -97,6 +97,21 @@ static irqreturn_t um_timer(int irq, voi
 	return IRQ_HANDLED;
 }
 
+static cycle_t itimer_read(void)
+{
+	return os_nsecs();
+}
+
+static struct clocksource itimer_clocksource = {
+	.name		= "itimer",
+	.rating		= 300,
+	.read		= itimer_read,
+	.mask		= CLOCKSOURCE_MASK(64),
+	.mult		= 1,
+	.shift		= 0,
+	.flags		= CLOCK_SOURCE_IS_CONTINUOUS,
+};
+
 static void __init setup_itimer(void)
 {
 	int err;
@@ -106,6 +121,12 @@ static void __init setup_itimer(void)
 		printk(KERN_ERR "register_timer : request_irq failed - "
 		       "errno = %d\n", -err);
 
+	err = clocksource_register(&itimer_clocksource);
+	if (err) {
+		printk(KERN_ERR "clocksource_register returned %d\n", err);
+		return;
+	}
+
 	itimer_clockevent.mult = div_sc(HZ, NSEC_PER_SEC, 32);
 	itimer_clockevent.max_delta_ns =
 		clockevent_delta2ns(60 * HZ, &itimer_clockevent);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/