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[PATCH] kill wall_jiffies
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 <anemo@mba.ocn.ne.jp> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Hirokazu Takata <takata.hirokazu@renesas.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Atsushi Nemoto
Linus Torvalds
parent
70bc42f90a
commit
8ef386092d
26 changed files with 35 additions and 190 deletions
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@ -54,8 +54,6 @@
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#include "proto.h"
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#include "irq_impl.h"
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extern unsigned long wall_jiffies; /* kernel/timer.c */
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static int set_rtc_mmss(unsigned long);
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DEFINE_SPINLOCK(rtc_lock);
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@ -413,7 +411,7 @@ void
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do_gettimeofday(struct timeval *tv)
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{
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unsigned long flags;
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unsigned long sec, usec, lost, seq;
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unsigned long sec, usec, seq;
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unsigned long delta_cycles, delta_usec, partial_tick;
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do {
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@ -423,14 +421,13 @@ do_gettimeofday(struct timeval *tv)
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sec = xtime.tv_sec;
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usec = (xtime.tv_nsec / 1000);
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partial_tick = state.partial_tick;
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lost = jiffies - wall_jiffies;
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} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
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#ifdef CONFIG_SMP
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/* Until and unless we figure out how to get cpu cycle counters
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in sync and keep them there, we can't use the rpcc tricks. */
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delta_usec = lost * (1000000 / HZ);
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delta_usec = 0;
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#else
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/*
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* usec = cycles * ticks_per_cycle * 2**48 * 1e6 / (2**48 * ticks)
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@ -446,8 +443,7 @@ do_gettimeofday(struct timeval *tv)
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*/
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delta_usec = (delta_cycles * state.scaled_ticks_per_cycle
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+ partial_tick
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+ (lost << FIX_SHIFT)) * 15625;
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+ partial_tick) * 15625;
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delta_usec = ((delta_usec / ((1UL << (FIX_SHIFT-6-1)) * HZ)) + 1) / 2;
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#endif
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@ -480,12 +476,11 @@ do_settimeofday(struct timespec *tv)
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time. Without this, a full-tick error is possible. */
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#ifdef CONFIG_SMP
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delta_nsec = (jiffies - wall_jiffies) * (NSEC_PER_SEC / HZ);
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delta_nsec = 0;
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#else
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delta_nsec = rpcc() - state.last_time;
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delta_nsec = (delta_nsec * state.scaled_ticks_per_cycle
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+ state.partial_tick
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+ ((jiffies - wall_jiffies) << FIX_SHIFT)) * 15625;
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+ state.partial_tick) * 15625;
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delta_nsec = ((delta_nsec / ((1UL << (FIX_SHIFT-6-1)) * HZ)) + 1) / 2;
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delta_nsec *= 1000;
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#endif
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@ -37,8 +37,6 @@
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*/
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struct sys_timer *system_timer;
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extern unsigned long wall_jiffies;
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/* this needs a better home */
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DEFINE_SPINLOCK(rtc_lock);
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@ -237,16 +235,11 @@ void do_gettimeofday(struct timeval *tv)
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{
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unsigned long flags;
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unsigned long seq;
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unsigned long usec, sec, lost;
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unsigned long usec, sec;
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do {
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seq = read_seqbegin_irqsave(&xtime_lock, flags);
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usec = system_timer->offset();
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lost = jiffies - wall_jiffies;
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if (lost)
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usec += lost * USECS_PER_JIFFY;
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sec = xtime.tv_sec;
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usec += xtime.tv_nsec / 1000;
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} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
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@ -279,7 +272,6 @@ int do_settimeofday(struct timespec *tv)
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* done, and then undo it!
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*/
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nsec -= system_timer->offset() * NSEC_PER_USEC;
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nsec -= (jiffies - wall_jiffies) * TICK_NSEC;
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wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
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wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
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@ -33,8 +33,6 @@
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#include <asm/irq.h>
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#include <asm/ioc.h>
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extern unsigned long wall_jiffies;
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/* this needs a better home */
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DEFINE_SPINLOCK(rtc_lock);
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@ -136,16 +134,11 @@ void do_gettimeofday(struct timeval *tv)
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{
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unsigned long flags;
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unsigned long seq;
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unsigned long usec, sec, lost;
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unsigned long usec, sec;
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do {
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seq = read_seqbegin_irqsave(&xtime_lock, flags);
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usec = gettimeoffset();
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lost = jiffies - wall_jiffies;
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if (lost)
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usec += lost * USECS_PER_JIFFY;
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sec = xtime.tv_sec;
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usec += xtime.tv_nsec / 1000;
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} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
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@ -174,8 +167,7 @@ int do_settimeofday(struct timespec *tv)
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* wall time. Discover what correction gettimeofday() would have
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* done, and then undo it!
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*/
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tv->tv_nsec -= 1000 * (gettimeoffset() +
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(jiffies - wall_jiffies) * USECS_PER_JIFFY);
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tv->tv_nsec -= 1000 * gettimeoffset();
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while (tv->tv_nsec < 0) {
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tv->tv_nsec += NSEC_PER_SEC;
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@ -37,7 +37,6 @@ int have_rtc; /* used to remember if we have an RTC or not */;
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#define TICK_SIZE tick
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extern unsigned long wall_jiffies;
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extern unsigned long loops_per_jiffy; /* init/main.c */
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unsigned long loops_per_usec;
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@ -58,11 +57,6 @@ void do_gettimeofday(struct timeval *tv)
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local_irq_save(flags);
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local_irq_disable();
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usec = do_gettimeoffset();
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{
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unsigned long lost = jiffies - wall_jiffies;
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if (lost)
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usec += lost * (1000000 / HZ);
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}
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/*
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* If time_adjust is negative then NTP is slowing the clock
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@ -103,7 +97,6 @@ int do_settimeofday(struct timespec *tv)
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* made, and then undo it!
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*/
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nsec -= do_gettimeoffset() * NSEC_PER_USEC;
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nsec -= (jiffies - wall_jiffies) * TICK_NSEC;
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wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
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wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
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@ -76,8 +76,6 @@ int pit_latch_buggy; /* extern */
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unsigned int cpu_khz; /* Detected as we calibrate the TSC */
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EXPORT_SYMBOL(cpu_khz);
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extern unsigned long wall_jiffies;
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DEFINE_SPINLOCK(rtc_lock);
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EXPORT_SYMBOL(rtc_lock);
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@ -329,7 +327,6 @@ static int timer_resume(struct sys_device *dev)
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do_settimeofday(&ts);
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write_seqlock_irqsave(&xtime_lock, flags);
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jiffies_64 += sleep_length;
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wall_jiffies += sleep_length;
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write_sequnlock_irqrestore(&xtime_lock, flags);
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touch_softlockup_watchdog();
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return 0;
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@ -29,8 +29,6 @@
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#include <asm/sections.h>
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#include <asm/system.h>
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extern unsigned long wall_jiffies;
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volatile int time_keeper_id = 0; /* smp_processor_id() of time-keeper */
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#ifdef CONFIG_IA64_DEBUG_IRQ
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@ -38,7 +38,6 @@ extern void send_IPI_allbutself(int, int);
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extern void smp_local_timer_interrupt(struct pt_regs *);
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#endif
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extern unsigned long wall_jiffies;
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#define TICK_SIZE (tick_nsec / 1000)
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/*
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@ -108,24 +107,17 @@ void do_gettimeofday(struct timeval *tv)
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unsigned long max_ntp_tick = tick_usec - tickadj;
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do {
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unsigned long lost;
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seq = read_seqbegin(&xtime_lock);
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usec = do_gettimeoffset();
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lost = jiffies - wall_jiffies;
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/*
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* If time_adjust is negative then NTP is slowing the clock
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* so make sure not to go into next possible interval.
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* Better to lose some accuracy than have time go backwards..
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*/
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if (unlikely(time_adjust < 0)) {
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if (unlikely(time_adjust < 0))
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usec = min(usec, max_ntp_tick);
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if (lost)
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usec += lost * max_ntp_tick;
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} else if (unlikely(lost))
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usec += lost * tick_usec;
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sec = xtime.tv_sec;
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usec += (xtime.tv_nsec / 1000);
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* made, and then undo it!
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*/
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nsec -= do_gettimeoffset() * NSEC_PER_USEC;
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nsec -= (jiffies - wall_jiffies) * TICK_NSEC;
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wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
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wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
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@ -96,31 +96,23 @@ void time_init(void)
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void do_gettimeofday(struct timeval *tv)
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{
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unsigned long flags;
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extern unsigned long wall_jiffies;
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unsigned long seq;
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unsigned long usec, sec, lost;
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unsigned long usec, sec;
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unsigned long max_ntp_tick = tick_usec - tickadj;
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do {
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seq = read_seqbegin_irqsave(&xtime_lock, flags);
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usec = mach_gettimeoffset();
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lost = jiffies - wall_jiffies;
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/*
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* If time_adjust is negative then NTP is slowing the clock
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* so make sure not to go into next possible interval.
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* Better to lose some accuracy than have time go backwards..
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*/
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if (unlikely(time_adjust < 0)) {
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if (unlikely(time_adjust < 0))
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usec = min(usec, max_ntp_tick);
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if (lost)
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usec += lost * max_ntp_tick;
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}
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else if (unlikely(lost))
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usec += lost * tick_usec;
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sec = xtime.tv_sec;
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usec += xtime.tv_nsec/1000;
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} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
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@ -141,7 +133,6 @@ int do_settimeofday(struct timespec *tv)
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{
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time_t wtm_sec, sec = tv->tv_sec;
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long wtm_nsec, nsec = tv->tv_nsec;
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extern unsigned long wall_jiffies;
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if ((unsigned long)tv->tv_nsec >= NSEC_PER_SEC)
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return -EINVAL;
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@ -153,8 +144,7 @@ int do_settimeofday(struct timespec *tv)
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* Discover what correction gettimeofday
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* would have done, and then undo it!
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*/
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nsec -= 1000 * (mach_gettimeoffset() +
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(jiffies - wall_jiffies) * (1000000 / HZ));
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nsec -= 1000 * mach_gettimeoffset();
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wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
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wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
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@ -26,8 +26,6 @@
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#define TICK_SIZE (tick_nsec / 1000)
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extern unsigned long wall_jiffies;
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static inline int set_rtc_mmss(unsigned long nowtime)
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{
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@ -124,15 +122,12 @@ void time_init(void)
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void do_gettimeofday(struct timeval *tv)
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{
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unsigned long flags;
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unsigned long lost, seq;
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unsigned long seq;
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unsigned long usec, sec;
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do {
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seq = read_seqbegin_irqsave(&xtime_lock, flags);
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usec = mach_gettimeoffset ? mach_gettimeoffset() : 0;
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lost = jiffies - wall_jiffies;
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if (lost)
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usec += lost * (1000000 / HZ);
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sec = xtime.tv_sec;
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usec += (xtime.tv_nsec / 1000);
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} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
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@ -47,8 +47,6 @@
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/*
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* forward reference
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*/
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extern volatile unsigned long wall_jiffies;
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DEFINE_SPINLOCK(rtc_lock);
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/*
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@ -159,7 +157,6 @@ void (*mips_hpt_init)(unsigned int);
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void do_gettimeofday(struct timeval *tv)
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{
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unsigned long seq;
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unsigned long lost;
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unsigned long usec, sec;
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unsigned long max_ntp_tick;
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@ -168,8 +165,6 @@ void do_gettimeofday(struct timeval *tv)
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usec = do_gettimeoffset();
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lost = jiffies - wall_jiffies;
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/*
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* If time_adjust is negative then NTP is slowing the clock
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* so make sure not to go into next possible interval.
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@ -178,11 +173,7 @@ void do_gettimeofday(struct timeval *tv)
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if (unlikely(time_adjust < 0)) {
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max_ntp_tick = (USEC_PER_SEC / HZ) - tickadj;
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usec = min(usec, max_ntp_tick);
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if (lost)
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usec += lost * max_ntp_tick;
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} else if (unlikely(lost))
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usec += lost * (USEC_PER_SEC / HZ);
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}
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sec = xtime.tv_sec;
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usec += (xtime.tv_nsec / 1000);
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@ -217,7 +208,6 @@ int do_settimeofday(struct timespec *tv)
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* made, and then undo it!
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*/
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nsec -= do_gettimeoffset() * NSEC_PER_USEC;
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nsec -= (jiffies - wall_jiffies) * tick_nsec;
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wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
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wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
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@ -42,8 +42,6 @@
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static unsigned long ct_cur[NR_CPUS]; /* What counter should be at next timer irq */
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static long last_rtc_update; /* Last time the rtc clock got updated */
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extern volatile unsigned long wall_jiffies;
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#if 0
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static int set_rtc_mmss(unsigned long nowtime)
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{
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@ -32,9 +32,6 @@
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#include <linux/timex.h>
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/* xtime and wall_jiffies keep wall-clock time */
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extern unsigned long wall_jiffies;
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static long clocktick __read_mostly; /* timer cycles per tick */
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static long halftick __read_mostly;
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@ -112,7 +109,7 @@ EXPORT_SYMBOL(profile_pc);
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/*** converted from ia64 ***/
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/*
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* Return the number of micro-seconds that elapsed since the last
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* update to wall time (aka xtime aka wall_jiffies). The xtime_lock
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* update to wall time (aka xtime). The xtime_lock
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* must be at least read-locked when calling this routine.
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*/
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static inline unsigned long
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@ -117,8 +117,6 @@ unsigned tb_to_ns_shift;
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struct gettimeofday_struct do_gtod;
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
|
||||
extern struct timezone sys_tz;
|
||||
static long timezone_offset;
|
||||
|
||||
|
|
@ -816,11 +814,6 @@ int do_settimeofday(struct timespec *tv)
|
|||
/*
|
||||
* Subtract off the number of nanoseconds since the
|
||||
* beginning of the last tick.
|
||||
* Note that since we don't increment jiffies_64 anywhere other
|
||||
* than in do_timer (since we don't have a lost tick problem),
|
||||
* wall_jiffies will always be the same as jiffies,
|
||||
* and therefore the (jiffies - wall_jiffies) computation
|
||||
* has been removed.
|
||||
*/
|
||||
tb_delta = tb_ticks_since(tb_last_jiffy);
|
||||
tb_delta = mulhdu(tb_delta, do_gtod.varp->tb_to_xs); /* in xsec */
|
||||
|
|
|
|||
|
|
@ -80,8 +80,6 @@ unsigned tb_to_us;
|
|||
unsigned tb_last_stamp;
|
||||
unsigned long tb_to_ns_scale;
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
|
||||
/* used for timezone offset */
|
||||
static long timezone_offset;
|
||||
|
||||
|
|
@ -173,8 +171,7 @@ void timer_interrupt(struct pt_regs * regs)
|
|||
*/
|
||||
if ( ppc_md.set_rtc_time && ntp_synced() &&
|
||||
xtime.tv_sec - last_rtc_update >= 659 &&
|
||||
abs((xtime.tv_nsec / 1000) - (1000000-1000000/HZ)) < 500000/HZ &&
|
||||
jiffies - wall_jiffies == 1) {
|
||||
abs((xtime.tv_nsec / 1000) - (1000000-1000000/HZ)) < 500000/HZ) {
|
||||
if (ppc_md.set_rtc_time(xtime.tv_sec+1 + timezone_offset) == 0)
|
||||
last_rtc_update = xtime.tv_sec+1;
|
||||
else
|
||||
|
|
@ -200,7 +197,7 @@ void do_gettimeofday(struct timeval *tv)
|
|||
{
|
||||
unsigned long flags;
|
||||
unsigned long seq;
|
||||
unsigned delta, lost_ticks, usec, sec;
|
||||
unsigned delta, usec, sec;
|
||||
|
||||
do {
|
||||
seq = read_seqbegin_irqsave(&xtime_lock, flags);
|
||||
|
|
@ -214,10 +211,9 @@ void do_gettimeofday(struct timeval *tv)
|
|||
if (!smp_tb_synchronized)
|
||||
delta = 0;
|
||||
#endif /* CONFIG_SMP */
|
||||
lost_ticks = jiffies - wall_jiffies;
|
||||
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
|
||||
|
||||
usec += mulhwu(tb_to_us, tb_ticks_per_jiffy * lost_ticks + delta);
|
||||
usec += mulhwu(tb_to_us, delta);
|
||||
while (usec >= 1000000) {
|
||||
sec++;
|
||||
usec -= 1000000;
|
||||
|
|
@ -258,7 +254,6 @@ int do_settimeofday(struct timespec *tv)
|
|||
* still reasonable when gettimeofday resolution is 1 jiffy.
|
||||
*/
|
||||
tb_delta = tb_ticks_since(last_jiffy_stamp(smp_processor_id()));
|
||||
tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy;
|
||||
|
||||
new_nsec -= 1000 * mulhwu(tb_to_us, tb_delta);
|
||||
|
||||
|
|
|
|||
|
|
@ -53,8 +53,6 @@ static u64 init_timer_cc;
|
|||
static u64 jiffies_timer_cc;
|
||||
static u64 xtime_cc;
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
|
||||
/*
|
||||
* Scheduler clock - returns current time in nanosec units.
|
||||
*/
|
||||
|
|
@ -87,9 +85,8 @@ static inline unsigned long do_gettimeoffset(void)
|
|||
{
|
||||
__u64 now;
|
||||
|
||||
now = (get_clock() - jiffies_timer_cc) >> 12;
|
||||
/* We require the offset from the latest update of xtime */
|
||||
now -= (__u64) wall_jiffies*USECS_PER_JIFFY;
|
||||
now = (get_clock() - jiffies_timer_cc) >> 12;
|
||||
now -= (__u64) jiffies * USECS_PER_JIFFY;
|
||||
return (unsigned long) now;
|
||||
}
|
||||
|
||||
|
|
|
|||
|
|
@ -18,7 +18,6 @@
|
|||
#include <asm/timer.h>
|
||||
#include <asm/kgdb.h>
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
struct sys_timer *sys_timer;
|
||||
|
||||
/* Move this somewhere more sensible.. */
|
||||
|
|
@ -52,16 +51,10 @@ void do_gettimeofday(struct timeval *tv)
|
|||
{
|
||||
unsigned long seq;
|
||||
unsigned long usec, sec;
|
||||
unsigned long lost;
|
||||
|
||||
do {
|
||||
seq = read_seqbegin(&xtime_lock);
|
||||
usec = get_timer_offset();
|
||||
|
||||
lost = jiffies - wall_jiffies;
|
||||
if (lost)
|
||||
usec += lost * (1000000 / HZ);
|
||||
|
||||
sec = xtime.tv_sec;
|
||||
usec += xtime.tv_nsec / 1000;
|
||||
} while (read_seqretry(&xtime_lock, seq));
|
||||
|
|
@ -91,8 +84,7 @@ int do_settimeofday(struct timespec *tv)
|
|||
* wall time. Discover what correction gettimeofday() would have
|
||||
* made, and then undo it!
|
||||
*/
|
||||
nsec -= 1000 * (get_timer_offset() +
|
||||
(jiffies - wall_jiffies) * (1000000 / HZ));
|
||||
nsec -= 1000 * get_timer_offset();
|
||||
|
||||
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
|
||||
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
|
||||
|
|
|
|||
|
|
@ -107,8 +107,6 @@
|
|||
|
||||
#define TICK_SIZE (tick_nsec / 1000)
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
|
||||
static unsigned long tmu_base, rtc_base;
|
||||
unsigned long cprc_base;
|
||||
|
||||
|
|
@ -194,13 +192,6 @@ void do_gettimeofday(struct timeval *tv)
|
|||
do {
|
||||
seq = read_seqbegin_irqsave(&xtime_lock, flags);
|
||||
usec = usecs_since_tick();
|
||||
{
|
||||
unsigned long lost = jiffies - wall_jiffies;
|
||||
|
||||
if (lost)
|
||||
usec += lost * (1000000 / HZ);
|
||||
}
|
||||
|
||||
sec = xtime.tv_sec;
|
||||
usec += xtime.tv_nsec / 1000;
|
||||
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
|
||||
|
|
@ -229,8 +220,7 @@ int do_settimeofday(struct timespec *tv)
|
|||
* wall time. Discover what correction gettimeofday() would have
|
||||
* made, and then undo it!
|
||||
*/
|
||||
nsec -= 1000 * (usecs_since_tick() +
|
||||
(jiffies - wall_jiffies) * (1000000 / HZ));
|
||||
nsec -= 1000 * usecs_since_tick();
|
||||
|
||||
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
|
||||
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
|
||||
|
|
|
|||
|
|
@ -765,8 +765,6 @@ static __inline__ unsigned long do_gettimeoffset(void)
|
|||
return count;
|
||||
}
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
|
||||
static void pci_do_gettimeofday(struct timeval *tv)
|
||||
{
|
||||
unsigned long flags;
|
||||
|
|
@ -775,26 +773,17 @@ static void pci_do_gettimeofday(struct timeval *tv)
|
|||
unsigned long max_ntp_tick = tick_usec - tickadj;
|
||||
|
||||
do {
|
||||
unsigned long lost;
|
||||
|
||||
seq = read_seqbegin_irqsave(&xtime_lock, flags);
|
||||
usec = do_gettimeoffset();
|
||||
lost = jiffies - wall_jiffies;
|
||||
|
||||
/*
|
||||
* If time_adjust is negative then NTP is slowing the clock
|
||||
* so make sure not to go into next possible interval.
|
||||
* Better to lose some accuracy than have time go backwards..
|
||||
*/
|
||||
if (unlikely(time_adjust < 0)) {
|
||||
if (unlikely(time_adjust < 0))
|
||||
usec = min(usec, max_ntp_tick);
|
||||
|
||||
if (lost)
|
||||
usec += lost * max_ntp_tick;
|
||||
}
|
||||
else if (unlikely(lost))
|
||||
usec += lost * tick_usec;
|
||||
|
||||
sec = xtime.tv_sec;
|
||||
usec += (xtime.tv_nsec / 1000);
|
||||
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
|
||||
|
|
@ -819,8 +808,7 @@ static int pci_do_settimeofday(struct timespec *tv)
|
|||
* wall time. Discover what correction gettimeofday() would have
|
||||
* made, and then undo it!
|
||||
*/
|
||||
tv->tv_nsec -= 1000 * (do_gettimeoffset() +
|
||||
(jiffies - wall_jiffies) * (USEC_PER_SEC / HZ));
|
||||
tv->tv_nsec -= 1000 * do_gettimeoffset();
|
||||
while (tv->tv_nsec < 0) {
|
||||
tv->tv_nsec += NSEC_PER_SEC;
|
||||
tv->tv_sec--;
|
||||
|
|
|
|||
|
|
@ -43,8 +43,6 @@
|
|||
#include <asm/pcic.h>
|
||||
#include <asm/of_device.h>
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
|
||||
DEFINE_SPINLOCK(rtc_lock);
|
||||
enum sparc_clock_type sp_clock_typ;
|
||||
DEFINE_SPINLOCK(mostek_lock);
|
||||
|
|
@ -449,7 +447,7 @@ unsigned long long sched_clock(void)
|
|||
|
||||
/* Ok, my cute asm atomicity trick doesn't work anymore.
|
||||
* There are just too many variables that need to be protected
|
||||
* now (both members of xtime, wall_jiffies, et al.)
|
||||
* now (both members of xtime, et al.)
|
||||
*/
|
||||
void do_gettimeofday(struct timeval *tv)
|
||||
{
|
||||
|
|
@ -459,26 +457,17 @@ void do_gettimeofday(struct timeval *tv)
|
|||
unsigned long max_ntp_tick = tick_usec - tickadj;
|
||||
|
||||
do {
|
||||
unsigned long lost;
|
||||
|
||||
seq = read_seqbegin_irqsave(&xtime_lock, flags);
|
||||
usec = do_gettimeoffset();
|
||||
lost = jiffies - wall_jiffies;
|
||||
|
||||
/*
|
||||
* If time_adjust is negative then NTP is slowing the clock
|
||||
* so make sure not to go into next possible interval.
|
||||
* Better to lose some accuracy than have time go backwards..
|
||||
*/
|
||||
if (unlikely(time_adjust < 0)) {
|
||||
if (unlikely(time_adjust < 0))
|
||||
usec = min(usec, max_ntp_tick);
|
||||
|
||||
if (lost)
|
||||
usec += lost * max_ntp_tick;
|
||||
}
|
||||
else if (unlikely(lost))
|
||||
usec += lost * tick_usec;
|
||||
|
||||
sec = xtime.tv_sec;
|
||||
usec += (xtime.tv_nsec / 1000);
|
||||
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
|
||||
|
|
@ -521,8 +510,7 @@ static int sbus_do_settimeofday(struct timespec *tv)
|
|||
* wall time. Discover what correction gettimeofday() would have
|
||||
* made, and then undo it!
|
||||
*/
|
||||
nsec -= 1000 * (do_gettimeoffset() +
|
||||
(jiffies - wall_jiffies) * (USEC_PER_SEC / HZ));
|
||||
nsec -= 1000 * do_gettimeoffset();
|
||||
|
||||
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
|
||||
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
|
||||
|
|
|
|||
|
|
@ -53,8 +53,6 @@ void __iomem *mstk48t02_regs = NULL;
|
|||
unsigned long ds1287_regs = 0UL;
|
||||
#endif
|
||||
|
||||
extern unsigned long wall_jiffies;
|
||||
|
||||
static void __iomem *mstk48t08_regs;
|
||||
static void __iomem *mstk48t59_regs;
|
||||
|
||||
|
|
|
|||
|
|
@ -77,7 +77,6 @@ unsigned long long monotonic_base;
|
|||
struct vxtime_data __vxtime __section_vxtime; /* for vsyscalls */
|
||||
|
||||
volatile unsigned long __jiffies __section_jiffies = INITIAL_JIFFIES;
|
||||
unsigned long __wall_jiffies __section_wall_jiffies = INITIAL_JIFFIES;
|
||||
struct timespec __xtime __section_xtime;
|
||||
struct timezone __sys_tz __section_sys_tz;
|
||||
|
||||
|
|
@ -119,7 +118,7 @@ unsigned int (*do_gettimeoffset)(void) = do_gettimeoffset_tsc;
|
|||
|
||||
void do_gettimeofday(struct timeval *tv)
|
||||
{
|
||||
unsigned long seq, t;
|
||||
unsigned long seq;
|
||||
unsigned int sec, usec;
|
||||
|
||||
do {
|
||||
|
|
@ -136,10 +135,7 @@ void do_gettimeofday(struct timeval *tv)
|
|||
be found. Note when you fix it here you need to do the same
|
||||
in arch/x86_64/kernel/vsyscall.c and export all needed
|
||||
variables in vmlinux.lds. -AK */
|
||||
|
||||
t = (jiffies - wall_jiffies) * USEC_PER_TICK +
|
||||
do_gettimeoffset();
|
||||
usec += t;
|
||||
usec += do_gettimeoffset();
|
||||
|
||||
} while (read_seqretry(&xtime_lock, seq));
|
||||
|
||||
|
|
@ -165,8 +161,7 @@ int do_settimeofday(struct timespec *tv)
|
|||
|
||||
write_seqlock_irq(&xtime_lock);
|
||||
|
||||
nsec -= do_gettimeoffset() * NSEC_PER_USEC +
|
||||
(jiffies - wall_jiffies) * NSEC_PER_TICK;
|
||||
nsec -= do_gettimeoffset() * NSEC_PER_USEC;
|
||||
|
||||
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
|
||||
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
|
||||
|
|
@ -1071,7 +1066,6 @@ static int timer_resume(struct sys_device *dev)
|
|||
vxtime.last_tsc = get_cycles_sync();
|
||||
write_sequnlock_irqrestore(&xtime_lock,flags);
|
||||
jiffies += sleep_length;
|
||||
wall_jiffies += sleep_length;
|
||||
monotonic_base += sleep_length * (NSEC_PER_SEC/HZ);
|
||||
touch_softlockup_watchdog();
|
||||
return 0;
|
||||
|
|
|
|||
|
|
@ -101,9 +101,6 @@ SECTIONS
|
|||
.vgetcpu_mode : AT(VLOAD(.vgetcpu_mode)) { *(.vgetcpu_mode) }
|
||||
vgetcpu_mode = VVIRT(.vgetcpu_mode);
|
||||
|
||||
.wall_jiffies : AT(VLOAD(.wall_jiffies)) { *(.wall_jiffies) }
|
||||
wall_jiffies = VVIRT(.wall_jiffies);
|
||||
|
||||
.sys_tz : AT(VLOAD(.sys_tz)) { *(.sys_tz) }
|
||||
sys_tz = VVIRT(.sys_tz);
|
||||
|
||||
|
|
|
|||
|
|
@ -66,8 +66,7 @@ static __always_inline void do_vgettimeofday(struct timeval * tv)
|
|||
sequence = read_seqbegin(&__xtime_lock);
|
||||
|
||||
sec = __xtime.tv_sec;
|
||||
usec = (__xtime.tv_nsec / 1000) +
|
||||
(__jiffies - __wall_jiffies) * (1000000 / HZ);
|
||||
usec = __xtime.tv_nsec / 1000;
|
||||
|
||||
if (__vxtime.mode != VXTIME_HPET) {
|
||||
t = get_cycles_sync();
|
||||
|
|
|
|||
|
|
@ -26,8 +26,6 @@
|
|||
#include <asm/platform.h>
|
||||
|
||||
|
||||
extern volatile unsigned long wall_jiffies;
|
||||
|
||||
DEFINE_SPINLOCK(rtc_lock);
|
||||
EXPORT_SYMBOL(rtc_lock);
|
||||
|
||||
|
|
@ -110,7 +108,6 @@ int do_settimeofday(struct timespec *tv)
|
|||
*/
|
||||
ccount = get_ccount();
|
||||
nsec -= (ccount - last_ccount_stamp) * CCOUNT_NSEC;
|
||||
nsec -= (jiffies - wall_jiffies) * CCOUNT_PER_JIFFY * CCOUNT_NSEC;
|
||||
|
||||
wtm_sec = wall_to_monotonic.tv_sec + (xtime.tv_sec - sec);
|
||||
wtm_nsec = wall_to_monotonic.tv_nsec + (xtime.tv_nsec - nsec);
|
||||
|
|
@ -129,7 +126,7 @@ EXPORT_SYMBOL(do_settimeofday);
|
|||
void do_gettimeofday(struct timeval *tv)
|
||||
{
|
||||
unsigned long flags;
|
||||
unsigned long sec, usec, delta, lost, seq;
|
||||
unsigned long sec, usec, delta, seq;
|
||||
|
||||
do {
|
||||
seq = read_seqbegin_irqsave(&xtime_lock, flags);
|
||||
|
|
@ -137,12 +134,9 @@ void do_gettimeofday(struct timeval *tv)
|
|||
delta = get_ccount() - last_ccount_stamp;
|
||||
sec = xtime.tv_sec;
|
||||
usec = (xtime.tv_nsec / NSEC_PER_USEC);
|
||||
|
||||
lost = jiffies - wall_jiffies;
|
||||
|
||||
} while (read_seqretry_irqrestore(&xtime_lock, seq, flags));
|
||||
|
||||
usec += lost * (1000000UL/HZ) + (delta * CCOUNT_NSEC) / NSEC_PER_USEC;
|
||||
usec += (delta * CCOUNT_NSEC) / NSEC_PER_USEC;
|
||||
for (; usec >= 1000000; sec++, usec -= 1000000)
|
||||
;
|
||||
|
||||
|
|
@ -179,8 +173,7 @@ again:
|
|||
|
||||
if (ntp_synced() &&
|
||||
xtime.tv_sec - last_rtc_update >= 659 &&
|
||||
abs((xtime.tv_nsec/1000)-(1000000-1000000/HZ))<5000000/HZ &&
|
||||
jiffies - wall_jiffies == 1) {
|
||||
abs((xtime.tv_nsec/1000)-(1000000-1000000/HZ))<5000000/HZ) {
|
||||
|
||||
if (platform_set_rtc_time(xtime.tv_sec+1) == 0)
|
||||
last_rtc_update = xtime.tv_sec+1;
|
||||
|
|
|
|||
|
|
@ -17,7 +17,6 @@ enum vsyscall_num {
|
|||
|
||||
#define __section_vxtime __attribute__ ((unused, __section__ (".vxtime"), aligned(16)))
|
||||
#define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), aligned(16)))
|
||||
#define __section_wall_jiffies __attribute__ ((unused, __section__ (".wall_jiffies"), aligned(16)))
|
||||
#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
|
||||
#define __section_sys_tz __attribute__ ((unused, __section__ (".sys_tz"), aligned(16)))
|
||||
#define __section_sysctl_vsyscall __attribute__ ((unused, __section__ (".sysctl_vsyscall"), aligned(16)))
|
||||
|
|
@ -48,14 +47,12 @@ extern struct vxtime_data __vxtime;
|
|||
extern int __vgetcpu_mode;
|
||||
extern struct timespec __xtime;
|
||||
extern volatile unsigned long __jiffies;
|
||||
extern unsigned long __wall_jiffies;
|
||||
extern struct timezone __sys_tz;
|
||||
extern seqlock_t __xtime_lock;
|
||||
|
||||
/* kernel space (writeable) */
|
||||
extern struct vxtime_data vxtime;
|
||||
extern int vgetcpu_mode;
|
||||
extern unsigned long wall_jiffies;
|
||||
extern struct timezone sys_tz;
|
||||
extern int sysctl_vsyscall;
|
||||
extern seqlock_t xtime_lock;
|
||||
|
|
|
|||
|
|
@ -768,7 +768,7 @@ static int timekeeping_suspended;
|
|||
* @dev: unused
|
||||
*
|
||||
* This is for the generic clocksource timekeeping.
|
||||
* xtime/wall_to_monotonic/jiffies/wall_jiffies/etc are
|
||||
* xtime/wall_to_monotonic/jiffies/etc are
|
||||
* still managed by arch specific suspend/resume code.
|
||||
*/
|
||||
static int timekeeping_resume(struct sys_device *dev)
|
||||
|
|
@ -1016,9 +1016,6 @@ static inline void calc_load(unsigned long ticks)
|
|||
}
|
||||
}
|
||||
|
||||
/* jiffies at the most recent update of wall time */
|
||||
unsigned long wall_jiffies = INITIAL_JIFFIES;
|
||||
|
||||
/*
|
||||
* This read-write spinlock protects us from races in SMP while
|
||||
* playing with xtime and avenrun.
|
||||
|
|
@ -1056,7 +1053,6 @@ void run_local_timers(void)
|
|||
*/
|
||||
static inline void update_times(unsigned long ticks)
|
||||
{
|
||||
wall_jiffies += ticks;
|
||||
update_wall_time();
|
||||
calc_load(ticks);
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in a new issue