linux-kernel - [PATCH 04/14] parisc: Convert parisc to use read/update_persistent

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Date:	Wed,  3 Mar 2010 19:57:19 -0800
From:	John Stultz <johnstul@...ibm.com>
To:	"	lkml" <linux-kernel@...r.kernel.org>
Cc:	John Stultz <johnstul@...ibm.com>,
	Kyle McMartin <kyle@...artin.ca>, Helge Deller <deller@....de>,
	Thomas Gleixner <tglx@...utronix.de>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 04/14] parisc: Convert parisc to use read/update_persistent_clock

This patch converts the parisc architecture to use the generic read_persistent_clock and update_persistent_clock interfaces, reducing the amount of arch specific code we have to maintain, and allowing for further cleanups in the future.

I have not built or tested this patch, so help from arch maintainers would be appreciated.

Cc: Kyle McMartin <kyle@...artin.ca>
Cc: Helge Deller <deller@....de>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Andrew Morton <akpm@...ux-foundation.org>

Signed-off-by: John Stultz <johnstul@...ibm.com>
---
 arch/parisc/kernel/time.c |   29 +++++++++++++----------------
 1 files changed, 13 insertions(+), 16 deletions(-)

diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index a79c6f9..05511cc 100644
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -250,9 +250,21 @@ static int __init rtc_init(void)
 }
 module_init(rtc_init);
 
-void __init time_init(void)
+void read_persistent_clock(struct timespec *ts)
 {
 	static struct pdc_tod tod_data;
+	if (pdc_tod_read(&tod_data) == 0) {
+		ts->tv_sec = tod_data.tod_sec;
+		ts->tv_nsec = tod_data.tod_usec * 1000;
+	} else {
+		printk(KERN_ERR "Error reading tod clock\n");
+	        ts->tv_sec = 0;
+		ts->tv_nsec = 0;
+	}
+}
+
+void __init time_init(void)
+{
 	unsigned long current_cr16_khz;
 
 	clocktick = (100 * PAGE0->mem_10msec) / HZ;
@@ -264,19 +276,4 @@ void __init time_init(void)
 	clocksource_cr16.mult = clocksource_khz2mult(current_cr16_khz,
 						clocksource_cr16.shift);
 	clocksource_register(&clocksource_cr16);
-
-	if (pdc_tod_read(&tod_data) == 0) {
-		unsigned long flags;
-
-		write_seqlock_irqsave(&xtime_lock, flags);
-		xtime.tv_sec = tod_data.tod_sec;
-		xtime.tv_nsec = tod_data.tod_usec * 1000;
-		set_normalized_timespec(&wall_to_monotonic,
-		                        -xtime.tv_sec, -xtime.tv_nsec);
-		write_sequnlock_irqrestore(&xtime_lock, flags);
-	} else {
-		printk(KERN_ERR "Error reading tod clock\n");
-	        xtime.tv_sec = 0;
-		xtime.tv_nsec = 0;
-	}
 }
-- 
1.6.0.4

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