[PATCH] simplify update_times (avoid jiffies/jiffies_64 aliasing problem)

Pass ticks to do_timer() and update_times(), and adjust x86_64 and s390
timer interrupt handler with this change.

Currently update_times() calculates ticks by "jiffies - wall_jiffies", but
callers of do_timer() should know how many ticks to update.  Passing ticks
get rid of this redundant calculation.  Also there are another redundancy
pointed out by Martin Schwidefsky.

This cleanup make a barrier added by
5aee405c662ca644980c184774277fc6d0769a84 needless.  So this patch removes
it.

As a bonus, this cleanup make wall_jiffies can be removed easily, since now
wall_jiffies is always synced with jiffies.  (This patch does not really
remove wall_jiffies.  It would be another cleanup patch)

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
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>
Acked-by: Russell King <rmk@arm.linux.org.uk>
Cc: Ian Molton <spyro@f2s.com>
Cc: Mikael Starvik <starvik@axis.com>
Acked-by: David Howells <dhowells@redhat.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Hirokazu Takata <takata.hirokazu@renesas.com>
Acked-by: 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>
Acked-by: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/arch/alpha/kernel/time.c b/arch/alpha/kernel/time.c
index b191cc75973751d5bdfe6137596a051a1c821b13..7c1e44420a78ce8ffa5e63ac6ec1930e2d0c80f9 100644 (file)
--- a/arch/alpha/kernel/time.c
+++ b/arch/alpha/kernel/time.c
@@ -132,7 +132,7 @@ irqreturn_t timer_interrupt(int irq, void *dev, struct pt_regs * regs)
        nticks = delta >> FIX_SHIFT;
 
        while (nticks > 0) {
-               do_timer(regs);
+               do_timer(1);
 #ifndef CONFIG_SMP
                update_process_times(user_mode(regs));
 #endif

diff --git a/arch/arm/kernel/time.c b/arch/arm/kernel/time.c
index d4dceb5f06e94181b0300fbd3a1375f6a573194d..f7d5165796ef2e337ea6a8473c4db562535efb1c 100644 (file)
--- a/arch/arm/kernel/time.c
+++ b/arch/arm/kernel/time.c
@@ -337,7 +337,7 @@ void timer_tick(struct pt_regs *regs)
        profile_tick(CPU_PROFILING, regs);
        do_leds();
        do_set_rtc();
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/arm26/kernel/time.c b/arch/arm26/kernel/time.c
index db63d75d0715927bda8d6379a63dcdb8dd224822..80adbd005fc51812a8a0bc1701e37513c424f5b0 100644 (file)
--- a/arch/arm26/kernel/time.c
+++ b/arch/arm26/kernel/time.c
@@ -194,7 +194,7 @@ EXPORT_SYMBOL(do_settimeofday);
 
 static irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
-        do_timer(regs);
+        do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/avr32/kernel/time.c b/arch/avr32/kernel/time.c
index b0e6b5855a381d2096c9a9b581874be3fd5b634e..3e56b9f4358af4a3728c96ed2815eb033a0fc841 100644 (file)
--- a/arch/avr32/kernel/time.c
+++ b/arch/avr32/kernel/time.c
@@ -148,7 +148,7 @@ timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
         * Call the generic timer interrupt handler
         */
        write_seqlock(&xtime_lock);
-       do_timer(regs);
+       do_timer(1);
        write_sequnlock(&xtime_lock);
 
        /*

diff --git a/arch/cris/arch-v10/kernel/time.c b/arch/cris/arch-v10/kernel/time.c
index 9c22b76e129a32a18e49da042a675d23f8756ed2..ebacf1457d914cacae4069c21094639fbc906dd7 100644 (file)
--- a/arch/cris/arch-v10/kernel/time.c
+++ b/arch/cris/arch-v10/kernel/time.c
@@ -227,7 +227,7 @@ timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
        
        /* call the real timer interrupt handler */
 
-       do_timer(regs);
+       do_timer(1);
        
         cris_do_profile(regs); /* Save profiling information */
 

diff --git a/arch/cris/arch-v32/kernel/time.c b/arch/cris/arch-v32/kernel/time.c
index 50f3f93293d64d33c8b1183a6971faf68eca0912..be0a01657d4fc88076e120b88264977acd25d2ed 100644 (file)
--- a/arch/cris/arch-v32/kernel/time.c
+++ b/arch/cris/arch-v32/kernel/time.c
@@ -219,7 +219,7 @@ timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
                return IRQ_HANDLED;
 
        /* call the real timer interrupt handler */
-       do_timer(regs);
+       do_timer(1);
 
        /*
         * If we have an externally synchronized Linux clock, then update

diff --git a/arch/frv/kernel/time.c b/arch/frv/kernel/time.c
index 3d0284bccb940ba2d62c8c3e9e26f099065ff0b4..7e55884135ed8ee2cf460cd0c03c0f223853256d 100644 (file)
--- a/arch/frv/kernel/time.c
+++ b/arch/frv/kernel/time.c
@@ -70,7 +70,7 @@ static irqreturn_t timer_interrupt(int irq, void *dummy, struct pt_regs * regs)
         */
        write_seqlock(&xtime_lock);
 
-       do_timer(regs);
+       do_timer(1);
        update_process_times(user_mode(regs));
        profile_tick(CPU_PROFILING, regs);
 

diff --git a/arch/h8300/kernel/time.c b/arch/h8300/kernel/time.c
index 688a5100604c943c614e5ffeb8fef25ba5c9b2fd..e569d17b4ae6b92b5ceccf554795d6cd83070945 100644 (file)
--- a/arch/h8300/kernel/time.c
+++ b/arch/h8300/kernel/time.c
@@ -41,7 +41,7 @@ static void timer_interrupt(int irq, void *dummy, struct pt_regs * regs)
        /* may need to kick the hardware timer */
        platform_timer_eoi();
 
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c
index 6928ef0d64d852abc4a41b7ff5cfc2e1f14d5249..16262687a103a1be82d04f8b6acba09d2f7a2bd0 100644 (file)
--- a/arch/ia64/kernel/time.c
+++ b/arch/ia64/kernel/time.c
@@ -78,7 +78,7 @@ timer_interrupt (int irq, void *dev_id, struct pt_regs *regs)
                         * xtime_lock.
                         */
                        write_seqlock(&xtime_lock);
-                       do_timer(regs);
+                       do_timer(1);
                        local_cpu_data->itm_next = new_itm;
                        write_sequnlock(&xtime_lock);
                } else

diff --git a/arch/m32r/kernel/time.c b/arch/m32r/kernel/time.c
index ded0be07a476f62aca9f42ed17ea3f757f0453f0..7a896893cd284b80dbd4d2793dca650ec6032848 100644 (file)
--- a/arch/m32r/kernel/time.c
+++ b/arch/m32r/kernel/time.c
@@ -202,7 +202,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 #ifndef CONFIG_SMP
        profile_tick(CPU_PROFILING, regs);
 #endif
-       do_timer(regs);
+       do_timer(1);
 
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));

diff --git a/arch/m68k/kernel/time.c b/arch/m68k/kernel/time.c
index 98e4b1adfa29f3836cf69ddd339f02017669bff5..1072e4946a4acab38173ba2246773c363782164c 100644 (file)
--- a/arch/m68k/kernel/time.c
+++ b/arch/m68k/kernel/time.c
@@ -40,7 +40,7 @@ static inline int set_rtc_mmss(unsigned long nowtime)
  */
 static irqreturn_t timer_interrupt(int irq, void *dummy, struct pt_regs * regs)
 {
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/m68k/sun3/sun3ints.c b/arch/m68k/sun3/sun3ints.c
index f18b9d3ef16df601915abadca0d7f9d1df2b2726..dc4ea7e074a620e21e500b66b75ab10c21a31965 100644 (file)
--- a/arch/m68k/sun3/sun3ints.c
+++ b/arch/m68k/sun3/sun3ints.c
@@ -65,7 +65,7 @@ static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
 #ifdef CONFIG_SUN3
        intersil_clear();
 #endif
-        do_timer(fp);
+        do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(fp));
 #endif

diff --git a/arch/m68knommu/kernel/time.c b/arch/m68knommu/kernel/time.c
index 1db9872722200b91fc56dde75be3781dca13b567..db1e1ce0a34960392e44999cfc1e793e6e93532e 100644 (file)
--- a/arch/m68knommu/kernel/time.c
+++ b/arch/m68knommu/kernel/time.c
@@ -51,7 +51,7 @@ static irqreturn_t timer_interrupt(int irq, void *dummy, struct pt_regs * regs)
 
        write_seqlock(&xtime_lock);
 
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/mips/au1000/common/time.c b/arch/mips/au1000/common/time.c
index 7fbea1bf7b4824afb61d2bacc1c28ab40d1e9458..0a067f3113a54704a454501a14452996ec8b87c2 100644 (file)
--- a/arch/mips/au1000/common/time.c
+++ b/arch/mips/au1000/common/time.c
@@ -96,7 +96,7 @@ void mips_timer_interrupt(struct pt_regs *regs)
                timerlo = count;
 
                kstat_this_cpu.irqs[irq]++;
-               do_timer(regs);
+               do_timer(1);
 #ifndef CONFIG_SMP
                update_process_times(user_mode(regs));
 #endif
@@ -137,7 +137,7 @@ irqreturn_t counter0_irq(int irq, void *dev_id, struct pt_regs *regs)
        }
 
        while (time_elapsed > 0) {
-               do_timer(regs);
+               do_timer(1);
 #ifndef CONFIG_SMP
                update_process_times(user_mode(regs));
 #endif
@@ -156,7 +156,7 @@ irqreturn_t counter0_irq(int irq, void *dev_id, struct pt_regs *regs)
 
        if (jiffie_drift >= 999) {
                jiffie_drift -= 999;
-               do_timer(regs); /* increment jiffies by one */
+               do_timer(1); /* increment jiffies by one */
 #ifndef CONFIG_SMP
                update_process_times(user_mode(regs));
 #endif

diff --git a/arch/mips/gt64120/common/time.c b/arch/mips/gt64120/common/time.c
index d837b26fbe517e5602be5aec2ae5cb4d3b4ff244..7feca49350d18b4bc6ea2ed630c09bbfb3fd1937 100644 (file)
--- a/arch/mips/gt64120/common/time.c
+++ b/arch/mips/gt64120/common/time.c
@@ -34,7 +34,7 @@ static void gt64120_irq(int irq, void *dev_id, struct pt_regs *regs)
        if (irq_src & 0x00000800) {     /* Check for timer interrupt */
                handled = 1;
                irq_src &= ~0x00000800;
-               do_timer(regs);
+               do_timer(1);
 #ifndef CONFIG_SMP
                update_process_times(user_mode(regs));
 #endif

diff --git a/arch/mips/kernel/time.c b/arch/mips/kernel/time.c
index 170cb67f4ede504d67f38072a14735056daad8c2..6ab8d975a974213a3e7fe3c16014ebe4279d9c50 100644 (file)
--- a/arch/mips/kernel/time.c
+++ b/arch/mips/kernel/time.c
@@ -434,7 +434,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
        /*
         * call the generic timer interrupt handling
         */
-       do_timer(regs);
+       do_timer(1);
 
        /*
         * If we have an externally synchronized Linux clock, then update

diff --git a/arch/mips/momentum/ocelot_g/gt-irq.c b/arch/mips/momentum/ocelot_g/gt-irq.c
index 9fb2493fff02494c0bb8789d4e273f5ac786c4c4..6cd87cf0195a1ca8ce2dea022502527054ff1aec 100644 (file)
--- a/arch/mips/momentum/ocelot_g/gt-irq.c
+++ b/arch/mips/momentum/ocelot_g/gt-irq.c
@@ -133,7 +133,7 @@ static irqreturn_t gt64240_p0int_irq(int irq, void *dev, struct pt_regs *regs)
                MV_WRITE(TIMER_COUNTER_0_3_INTERRUPT_CAUSE, 0x0);
 
                /* handle the timer call */
-               do_timer(regs);
+               do_timer(1);
 #ifndef CONFIG_SMP
                update_process_times(user_mode(regs));
 #endif

diff --git a/arch/mips/sgi-ip27/ip27-timer.c b/arch/mips/sgi-ip27/ip27-timer.c
index b029ba79c27af0f685079ba562c3d980122cc884..c62a3a9ef867fa6e3af03ecb773b8418e3ebed37 100644 (file)
--- a/arch/mips/sgi-ip27/ip27-timer.c
+++ b/arch/mips/sgi-ip27/ip27-timer.c
@@ -111,7 +111,7 @@ again:
        kstat_this_cpu.irqs[irq]++;             /* kstat only for bootcpu? */
 
        if (cpu == 0)
-               do_timer(regs);
+               do_timer(1);
 
        update_process_times(user_mode(regs));
 

diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c
index 5facc9bff4ef68b584aa32fb263b99461e90eb77..700df10924dd8d671b9ae1d6f62b8763ad3f1c0a 100644 (file)
--- a/arch/parisc/kernel/time.c
+++ b/arch/parisc/kernel/time.c
@@ -79,7 +79,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 #endif
                if (cpu == 0) {
                        write_seqlock(&xtime_lock);
-                       do_timer(regs);
+                       do_timer(1);
                        write_sequnlock(&xtime_lock);
                }
        }

diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index 7a3c3f791ade2aaac30bbadc0994da40ea12e80a..71f71da98e7deb6288a9acdeb6a0449e493787b6 100644 (file)
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -693,7 +693,7 @@ void timer_interrupt(struct pt_regs * regs)
                tb_next_jiffy = tb_last_jiffy + tb_ticks_per_jiffy;
                if (per_cpu(last_jiffy, cpu) >= tb_next_jiffy) {
                        tb_last_jiffy = tb_next_jiffy;
-                       do_timer(regs);
+                       do_timer(1);
                        timer_recalc_offset(tb_last_jiffy);
                        timer_check_rtc();
                }

diff --git a/arch/ppc/kernel/time.c b/arch/ppc/kernel/time.c
index 6ab8cc7226ab232b220d9d555f0ed66358c0f6c0..1e1f315547671503d0370a2e36bb31eb071b7167 100644 (file)
--- a/arch/ppc/kernel/time.c
+++ b/arch/ppc/kernel/time.c
@@ -153,7 +153,7 @@ void timer_interrupt(struct pt_regs * regs)
                /* We are in an interrupt, no need to save/restore flags */
                write_seqlock(&xtime_lock);
                tb_last_stamp = jiffy_stamp;
-               do_timer(regs);
+               do_timer(1);
 
                /*
                 * update the rtc when needed, this should be performed on the

diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index 1981c6199fa20c559aefaf671565b09a3d10a22b..abab42e9f5f8718cfcda91702803e8d797f70544 100644 (file)
--- a/arch/s390/kernel/time.c
+++ b/arch/s390/kernel/time.c
@@ -166,7 +166,7 @@ EXPORT_SYMBOL(do_settimeofday);
 void account_ticks(struct pt_regs *regs)
 {
        __u64 tmp;
-       __u32 ticks, xticks;
+       __u32 ticks;
 
        /* Calculate how many ticks have passed. */
        if (S390_lowcore.int_clock < S390_lowcore.jiffy_timer) {
@@ -204,6 +204,7 @@ void account_ticks(struct pt_regs *regs)
         */
        write_seqlock(&xtime_lock);
        if (S390_lowcore.jiffy_timer > xtime_cc) {
+               __u32 xticks;
                tmp = S390_lowcore.jiffy_timer - xtime_cc;
                if (tmp >= 2*CLK_TICKS_PER_JIFFY) {
                        xticks = __div(tmp, CLK_TICKS_PER_JIFFY);
@@ -212,13 +213,11 @@ void account_ticks(struct pt_regs *regs)
                        xticks = 1;
                        xtime_cc += CLK_TICKS_PER_JIFFY;
                }
-               while (xticks--)
-                       do_timer(regs);
+               do_timer(xticks);
        }
        write_sequnlock(&xtime_lock);
 #else
-       for (xticks = ticks; xticks > 0; xticks--)
-               do_timer(regs);
+       do_timer(ticks);
 #endif
 
 #ifdef CONFIG_VIRT_CPU_ACCOUNTING

diff --git a/arch/sh/kernel/time.c b/arch/sh/kernel/time.c
index 149d9713eddf0432ff8321972cd31320652f4c30..f664a196c4f58dd635cd6ec960fd7808a8e8532f 100644 (file)
--- a/arch/sh/kernel/time.c
+++ b/arch/sh/kernel/time.c
@@ -117,7 +117,7 @@ static long last_rtc_update;
  */
 void handle_timer_tick(struct pt_regs *regs)
 {
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/sh64/kernel/time.c b/arch/sh64/kernel/time.c
index b8162e59030e447c6fcc1d12cdb0c59e15ce34e6..3b61e06f9d7258622d9aaa6123d433b66dd0f7d9 100644 (file)
--- a/arch/sh64/kernel/time.c
+++ b/arch/sh64/kernel/time.c
@@ -298,7 +298,7 @@ static inline void do_timer_interrupt(int irq, struct pt_regs *regs)
        asm ("getcon cr62, %0" : "=r" (current_ctc));
        ctc_last_interrupt = (unsigned long) current_ctc;
 
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/sparc/kernel/pcic.c b/arch/sparc/kernel/pcic.c
index bfd31aac2df3b2c7992f082fd08b9f5ba78da4c2..e19b1bad9bc56e0c1710c4c1d006b6867fdc5984 100644 (file)
--- a/arch/sparc/kernel/pcic.c
+++ b/arch/sparc/kernel/pcic.c
@@ -712,7 +712,7 @@ static irqreturn_t pcic_timer_handler (int irq, void *h, struct pt_regs *regs)
 {
        write_seqlock(&xtime_lock);     /* Dummy, to show that we remember */
        pcic_clear_clock_irq();
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/sparc/kernel/time.c b/arch/sparc/kernel/time.c
index 845081b0126760ac14e8b7c2735ad089bee991f2..6f84fa1b58e5e54b94c8ce42b05ee82c484c837b 100644 (file)
--- a/arch/sparc/kernel/time.c
+++ b/arch/sparc/kernel/time.c
@@ -128,7 +128,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)
 #endif
        clear_clock_irq();
 
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/sparc64/kernel/time.c b/arch/sparc64/kernel/time.c
index b0b4feeec09826f84a70e29d9ad8b77d6347ab7c..ca1193482f07d2df1cd292bd6cce62531bad3426 100644 (file)
--- a/arch/sparc64/kernel/time.c
+++ b/arch/sparc64/kernel/time.c
@@ -465,7 +465,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs * regs)
                profile_tick(CPU_PROFILING, regs);
                update_process_times(user_mode(regs));
 #endif
-               do_timer(regs);
+               do_timer(1);
 
                /* Guarantee that the following sequences execute
                 * uninterrupted.
@@ -496,7 +496,7 @@ void timer_tick_interrupt(struct pt_regs *regs)
 {
        write_seqlock(&xtime_lock);
 
-       do_timer(regs);
+       do_timer(1);
 
        timer_check_rtc();
 

diff --git a/arch/um/kernel/time.c b/arch/um/kernel/time.c
index 820affbf3e163cc4b99abc627fac7421786b8d57..a92965f8f9cdd57d600e229e136dee8fafa64d5a 100644 (file)
--- a/arch/um/kernel/time.c
+++ b/arch/um/kernel/time.c
@@ -93,7 +93,7 @@ irqreturn_t um_timer(int irq, void *dev, struct pt_regs *regs)
 
        write_seqlock_irqsave(&xtime_lock, flags);
 
-       do_timer(regs);
+       do_timer(1);
 
        nsecs = get_time();
        xtime.tv_sec = nsecs / NSEC_PER_SEC;

diff --git a/arch/v850/kernel/time.c b/arch/v850/kernel/time.c
index a0b46695f186f03921a7a09b66cde5af0bf5bfa8..f4d1a4d3cdc231696e55802039541e5b024b3c76 100644 (file)
--- a/arch/v850/kernel/time.c
+++ b/arch/v850/kernel/time.c
@@ -51,7 +51,7 @@ static irqreturn_t timer_interrupt (int irq, void *dummy, struct pt_regs *regs)
        if (mach_tick)
          mach_tick ();
 
-       do_timer (regs);
+       do_timer (1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/x86_64/kernel/time.c b/arch/x86_64/kernel/time.c
index 1c255ee76e7c81870768f54adc9a5fe149dc0239..7ea3bf2a858c6299c1c686fc0530b1da14bbef63 100644 (file)
--- a/arch/x86_64/kernel/time.c
+++ b/arch/x86_64/kernel/time.c
@@ -415,16 +415,16 @@ void main_timer_handler(struct pt_regs *regs)
                                (((long) offset << US_SCALE) / vxtime.tsc_quot) - 1;
        }
 
-       if (lost > 0) {
+       if (lost > 0)
                handle_lost_ticks(lost, regs);
-               jiffies += lost;
-       }
+       else
+               lost = 0;
 
 /*
  * Do the timer stuff.
  */
 
-       do_timer(regs);
+       do_timer(lost + 1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/arch/xtensa/kernel/time.c b/arch/xtensa/kernel/time.c
index 412ab32de391788de830fe5786adffe2ac3ca854..241db201f40e59300bb97691bdcc4b2608c80c23 100644 (file)
--- a/arch/xtensa/kernel/time.c
+++ b/arch/xtensa/kernel/time.c
@@ -175,7 +175,7 @@ again:
 
                last_ccount_stamp = next;
                next += CCOUNT_PER_JIFFY;
-               do_timer (regs); /* Linux handler in kernel/timer.c */
+               do_timer (1); /* Linux handler in kernel/timer.c */
 
                if (ntp_synced() &&
                    xtime.tv_sec - last_rtc_update >= 659 &&

diff --git a/include/asm-arm/arch-clps711x/time.h b/include/asm-arm/arch-clps711x/time.h
index 9cb27cd4e6ae9cb3237060ecd8c51f07c7a8822d..0e4a3901d3b36b0afa8ea1acbff9165e1bf515db 100644 (file)
--- a/include/asm-arm/arch-clps711x/time.h
+++ b/include/asm-arm/arch-clps711x/time.h
@@ -29,7 +29,7 @@ static irqreturn_t
 p720t_timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
        do_leds();
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/include/asm-arm/arch-l7200/time.h b/include/asm-arm/arch-l7200/time.h
index 7b98b533e63a85e84e36618a713d5a6412b9478f..c69cb508735f74aed3db85f0d7e1e662eba0896e 100644 (file)
--- a/include/asm-arm/arch-l7200/time.h
+++ b/include/asm-arm/arch-l7200/time.h
@@ -45,7 +45,7 @@
 static irqreturn_t
 timer_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 {
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode(regs));
 #endif

diff --git a/include/asm-i386/mach-default/do_timer.h b/include/asm-i386/mach-default/do_timer.h
index 6312c3e798147d508c1c695c175559dd96dc8daf..4182c347ef85052178ee67b193d3c5750c14aa58 100644 (file)
--- a/include/asm-i386/mach-default/do_timer.h
+++ b/include/asm-i386/mach-default/do_timer.h
@@ -16,7 +16,7 @@
 
 static inline void do_timer_interrupt_hook(struct pt_regs *regs)
 {
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode_vm(regs));
 #endif

diff --git a/include/asm-i386/mach-visws/do_timer.h b/include/asm-i386/mach-visws/do_timer.h
index 95568e6ca91cf3cff150c743ff9f0f87a070a4d9..8db618c5a72b0e50ec0502e7b0d6b8baadec456c 100644 (file)
--- a/include/asm-i386/mach-visws/do_timer.h
+++ b/include/asm-i386/mach-visws/do_timer.h
@@ -9,7 +9,7 @@ static inline void do_timer_interrupt_hook(struct pt_regs *regs)
        /* Clear the interrupt */
        co_cpu_write(CO_CPU_STAT,co_cpu_read(CO_CPU_STAT) & ~CO_STAT_TIMEINTR);
 
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode_vm(regs));
 #endif

diff --git a/include/asm-i386/mach-voyager/do_timer.h b/include/asm-i386/mach-voyager/do_timer.h
index eaf518098981cc843e564d3ec1b650f17442256e..099fe9f5c1b2bcc922079c7fa64b21b197d864b7 100644 (file)
--- a/include/asm-i386/mach-voyager/do_timer.h
+++ b/include/asm-i386/mach-voyager/do_timer.h
@@ -3,7 +3,7 @@
 
 static inline void do_timer_interrupt_hook(struct pt_regs *regs)
 {
-       do_timer(regs);
+       do_timer(1);
 #ifndef CONFIG_SMP
        update_process_times(user_mode_vm(regs));
 #endif

diff --git a/include/linux/sched.h b/include/linux/sched.h
index ed2af86715898b262b25e0ff9e5788ef821f03ae..503dea61ff99d7e761c34ec9d3a62668388eadce 100644 (file)
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1206,7 +1206,7 @@ extern void switch_uid(struct user_struct *);
 
 #include <asm/current.h>
 
-extern void do_timer(struct pt_regs *);
+extern void do_timer(unsigned long ticks);
 
 extern int FASTCALL(wake_up_state(struct task_struct * tsk, unsigned int state));
 extern int FASTCALL(wake_up_process(struct task_struct * tsk));

diff --git a/kernel/timer.c b/kernel/timer.c
index a2cb1ecb1b28f0293067e7a2a431efdbeb2f6d61..4f55622b0d38462ad59b28322d31ebeee8a0c40c 100644 (file)
--- a/kernel/timer.c
+++ b/kernel/timer.c
@@ -1222,10 +1222,8 @@ static inline void calc_load(unsigned long ticks)
        unsigned long active_tasks; /* fixed-point */
        static int count = LOAD_FREQ;
 
-       count -= ticks;
-       if (count < 0) {
-               count += LOAD_FREQ;
-               active_tasks = count_active_tasks();
+       active_tasks = count_active_tasks();
+       for (count -= ticks; count < 0; count += LOAD_FREQ) {
                CALC_LOAD(avenrun[0], EXP_1, active_tasks);
                CALC_LOAD(avenrun[1], EXP_5, active_tasks);
                CALC_LOAD(avenrun[2], EXP_15, active_tasks);
@@ -1270,11 +1268,8 @@ void run_local_timers(void)
  * Called by the timer interrupt. xtime_lock must already be taken
  * by the timer IRQ!
  */
-static inline void update_times(void)
+static inline void update_times(unsigned long ticks)
 {
-       unsigned long ticks;
-
-       ticks = jiffies - wall_jiffies;
        wall_jiffies += ticks;
        update_wall_time();
        calc_load(ticks);
@@ -1286,12 +1281,10 @@ static inline void update_times(void)
  * jiffies is defined in the linker script...
  */
 
-void do_timer(struct pt_regs *regs)
+void do_timer(unsigned long ticks)
 {
-       jiffies_64++;
-       /* prevent loading jiffies before storing new jiffies_64 value. */
-       barrier();
-       update_times();
+       jiffies_64 += ticks;
+       update_times(ticks);
 }
 
 #ifdef __ARCH_WANT_SYS_ALARM