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authorjohn stultz <johnstul@us.ibm.com>2007-05-06 14:51:53 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-07 12:13:04 -0700
commitee17b36fd0dc2af37ea92548595e30964674ded8 (patch)
treecfb2d5fe67802eac1c46d5542df86f237e1bcf1c /arch/v850
parentc2f239d93e8af991392871c57465cb2ac556b482 (diff)
downloadlinux-2.6.34-ux500-ee17b36fd0dc2af37ea92548595e30964674ded8.tar.gz
v850: generic timekeeping conversion
Convert an arch that does not currently implement sub-jiffy timekeeping to use the generic timekeeping code. v850 looks like it has some intent to implement sub-jiffy timekeeping, so it may not yet be appropriate to try to convert, but I figured I'd get the maintainer's input and submit the patch for comment. Signed-off-by: John Stultz <johnstul@us.ibm.com> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/v850')
-rw-r--r--arch/v850/Kconfig4
-rw-r--r--arch/v850/kernel/time.c75
2 files changed, 4 insertions, 75 deletions
diff --git a/arch/v850/Kconfig b/arch/v850/Kconfig
index 50ccc7f57cd..5f54c1236c1 100644
--- a/arch/v850/Kconfig
+++ b/arch/v850/Kconfig
@@ -37,6 +37,10 @@ config GENERIC_IRQ_PROBE
bool
default y
+config GENERIC_TIME
+ bool
+ default y
+
config TIME_LOW_RES
bool
default y
diff --git a/arch/v850/kernel/time.c b/arch/v850/kernel/time.c
index 486e3a441c8..f0905b03523 100644
--- a/arch/v850/kernel/time.c
+++ b/arch/v850/kernel/time.c
@@ -90,81 +90,6 @@ static irqreturn_t timer_interrupt (int irq, void *dummy, struct pt_regs *regs)
return IRQ_HANDLED;
}
-/*
- * This version of gettimeofday has near microsecond resolution.
- */
-void do_gettimeofday (struct timeval *tv)
-{
-#if 0 /* DAVIDM later if possible */
- extern volatile unsigned long lost_ticks;
- unsigned long lost;
-#endif
- unsigned long flags;
- unsigned long usec, sec;
- unsigned long seq;
-
- do {
- seq = read_seqbegin_irqsave(&xtime_lock, flags);
-
-#if 0
- usec = mach_gettimeoffset ? mach_gettimeoffset () : 0;
-#else
- usec = 0;
-#endif
-#if 0 /* DAVIDM later if possible */
- lost = lost_ticks;
- if (lost)
- usec += lost * (1000000/HZ);
-#endif
- sec = xtime.tv_sec;
- usec += xtime.tv_nsec / 1000;
- } while (read_seqretry_irqrestore(&xtime_lock, seq, 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_seqlock_irq (&xtime_lock);
-
- /* This is revolting. We need to set the xtime.tv_nsec
- * 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!
- */
-#if 0
- tv->tv_nsec -= mach_gettimeoffset() * 1000;
-#endif
-
- 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);
-
static int timer_dev_id;
static struct irqaction timer_irqaction = {
timer_interrupt,