linux.git/arch/cris/kernel/time.c, branch v2.6.37

CRIS: GENERIC_TIME fixes

2010-08-04T10:58:55+00:00

GENERIC_TIME was not functional for CRIS, giving random backward
time jumps.

For CRISv32 implement a new clocksource using the free running counter
and ditch the arch_gettimeoffset.

The random time jumps still existed, but turned out to be the write_seqlock
which was missing around our do_timer() call.

So switch over to GENERIC_TIME using the clocksource for CRISv32.

CRISv10 doesn't have the free running counter needed for the
clocksource trick, but we can still use GENERIC_TIME with
arch_gettimeoffset.

Unfortunately, there were problems in using the prescaler register
to timer0 for the gettimeoffset calculation, so it is now ignored,
making our resolution worse by the tune of 40usec (0.4%) worst case.

At the same time, clean up some formatting and use NSEC_PER_SEC
instead of 1000000000.

Signed-off-by: Jesper Nilsson

cris: Convert cris to use read/update_persistent_clock

2010-03-13T00:14:13+00:00

This patch converts the cris 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.

Signed-off-by: John Stultz 
Cc: Mikael Starvik 
Cc: Jesper Nilsson 
Cc: Andrew Morton 
LKML-Reference: <1267675049-12337-14-git-send-email-johnstul@us.ibm.com>
Signed-off-by: Thomas Gleixner

cris: convert to use arch_gettimeoffset()

2010-03-06T19:26:28+00:00

Convert cris to use GENERIC_TIME via the arch_getoffset() infrastructure,
reducing the amount of arch specific code we need to maintain.

Signed-off-by: John Stultz 
Cc: Mikael Starvik 
Cc: Jesper Nilsson 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

cris: use bcd2bin/bin2bcd

2008-10-20T15:52:41+00:00

Change cris to use the new bcd2bin/bin2bcd functions instead of the
obsolete BCD_TO_BIN/BIN_TO_BCD macros.

Signed-off-by: Adrian Bunk 
Cc: Chris Zankel 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

CRIS: Drop regs parameter from call to profile_tick in kernel/time.c

2008-02-08T10:06:40+00:00

CRIS: Add sched_clock to kernel/time.c

2008-02-08T10:06:37+00:00

Also, clean up some whitespace errors.

cris build fixes: fixes in arch/cris/kernel/time.c

2007-11-15T02:45:45+00:00

- Remove debug print.
- Change #if to #ifdef to avoid compile time warning if CONFIG_PROFILING
  isn't set.
- Number of parameters to profile_tick has changed, drop the regs parameter.

Signed-off-by: Jesper Nilsson 
Acked-by: Mikael Starvik 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] Consolidate default sched_clock()

2007-02-11T18:51:28+00:00

Use attribute(weak).

Signed-off-by: Alexey Dobriyan 
Acked-by: Ingo Molnar 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] CRIS: local_irq_disable() is redundant after local_irq_save()

2007-02-11T18:51:20+00:00

arch/cris/arch-v10/kernel/time.c::get_ns_in_jiffie() contains
local_irq_disable() call after local_irq_save().  This looks redundant.

arch/cris/kernel/time.c::do_gettimeofday() contains local_irq_disable() call
after local_irq_save().  This looks redundant.

Signed-off-by: Jiri Kosina 
Cc: Mikael Starvik 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] kill wall_jiffies

2006-10-01T07:39:27+00:00

With 2.6.18-rc4-mm2, now wall_jiffies will always be the same as jiffies.
So we can kill wall_jiffies completely.

This is just a cleanup and logically should not change any real behavior
except for one thing: RTC updating code in (old) ppc and xtensa use a
condition "jiffies - wall_jiffies == 1".  This condition is never met so I
suppose it is just a bug.  I just remove that condition only instead of
kill the whole "if" block.

[heiko.carstens@de.ibm.com: s390 build fix and cleanup]
Signed-off-by: Atsushi Nemoto 
Cc: Andi Kleen 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Russell King 
Cc: Ian Molton 
Cc: Mikael Starvik 
Cc: David Howells 
Cc: Yoshinori Sato 
Cc: Hirokazu Takata 
Cc: Ralf Baechle 
Cc: Kyle McMartin 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Cc: Paul Mundt 
Cc: Kazumoto Kojima 
Cc: Richard Curnow 
Cc: William Lee Irwin III 
Cc: "David S. Miller" 
Cc: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Cc: Miles Bader 
Cc: Chris Zankel 
Cc: "Luck, Tony" 
Cc: Geert Uytterhoeven 
Cc: Roman Zippel 
Signed-off-by: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds