From: john stultz <johnstul@us.ibm.com>
To: ysato@users.sourceforge.jp
Cc: Andrew Morton <akpm@linux-foundation.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH] h8300 trivial conversion to GENERIC_TIME
Date: Tue, 10 Apr 2007 16:25:00 -0700 [thread overview]
Message-ID: <1176247500.15198.72.camel@localhost> (raw)
Here is a trivial conversion of the h8300 arch to the GENERIC_TIME
infrastructure (h8300 does not have better then jiffies resolution, so
there are no clocksources to add). I have not tested this at all, but it
seems pretty straight forward
I'd appreciate any comments or feedback!
thanks
-john
Signed-off-by: John Stultz <johnstul@us.ibm.com>
diff --git a/arch/h8300/Kconfig b/arch/h8300/Kconfig
index 1734d96..86f6ca3 100644
--- a/arch/h8300/Kconfig
+++ b/arch/h8300/Kconfig
@@ -53,6 +53,10 @@ config GENERIC_CALIBRATE_DELAY
bool
default y
+config GENERIC_TIME
+ bool
+ default y
+
config TIME_LOW_RES
bool
default y
diff --git a/arch/h8300/kernel/time.c b/arch/h8300/kernel/time.c
index d1ef615..91d3b56 100644
--- a/arch/h8300/kernel/time.c
+++ b/arch/h8300/kernel/time.c
@@ -66,55 +66,3 @@ void time_init(void)
platform_timer_setup(timer_interrupt);
}
-
-/*
- * This version of gettimeofday has near microsecond resolution.
- */
-void do_gettimeofday(struct timeval *tv)
-{
- unsigned long flags;
- unsigned long usec, sec;
-
- read_lock_irqsave(&xtime_lock, flags);
- usec = 0;
- sec = xtime.tv_sec;
- usec += (xtime.tv_nsec / 1000);
- read_unlock_irqrestore(&xtime_lock, flags);
-
- while (usec >= 1000000) {
- usec -= 1000000;
- sec++;
- }
-
- tv->tv_sec = sec;
- tv->tv_usec = usec;
-}
-
-EXPORT_SYMBOL(do_gettimeofday);
-
-int do_settimeofday(struct timespec *tv)
-{
- if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
- return -EINVAL;
-
- write_lock_irq(&xtime_lock);
- /* This is revolting. We need to set the xtime.tv_usec
- * correctly. However, the value in this location is
- * is value at the last tick.
- * Discover what correction gettimeofday
- * would have done, and then undo it!
- */
- while (tv->tv_nsec < 0) {
- tv->tv_nsec += NSEC_PER_SEC;
- tv->tv_sec--;
- }
-
- xtime.tv_sec = tv->tv_sec;
- xtime.tv_nsec = tv->tv_nsec;
- ntp_clear();
- write_sequnlock_irq(&xtime_lock);
- clock_was_set();
- return 0;
-}
-
-EXPORT_SYMBOL(do_settimeofday);
next reply other threads:[~2007-04-10 23:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-10 23:25 john stultz [this message]
2007-04-11 3:35 ` [PATCH] h8300 trivial conversion to GENERIC_TIME Yoshinori Sato
2007-04-11 5:08 ` Andrew Morton
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