diff options
Diffstat (limited to 'arch/parisc/kernel/time.c')
| -rw-r--r-- | arch/parisc/kernel/time.c | 24 |
1 files changed, 11 insertions, 13 deletions
diff --git a/arch/parisc/kernel/time.c b/arch/parisc/kernel/time.c index 8c9b8a7ef24..bad7d1eb62b 100644 --- a/arch/parisc/kernel/time.c +++ b/arch/parisc/kernel/time.c @@ -34,10 +34,6 @@ static unsigned long clocktick __read_mostly; /* timer cycles per tick */ -#ifdef CONFIG_SMP -extern void smp_do_timer(struct pt_regs *regs); -#endif - /* * We keep time on PA-RISC Linux by using the Interval Timer which is * a pair of registers; one is read-only and one is write-only; both @@ -55,13 +51,14 @@ extern void smp_do_timer(struct pt_regs *regs); * held off for an arbitrarily long period of time by interrupts being * disabled, so we may miss one or more ticks. */ -irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) +irqreturn_t timer_interrupt(int irq, void *dev_id) { unsigned long now; unsigned long next_tick; unsigned long cycles_elapsed, ticks_elapsed; unsigned long cycles_remainder; unsigned int cpu = smp_processor_id(); + struct cpuinfo_parisc *cpuinfo = &cpu_data[cpu]; /* gcc can optimize for "read-only" case with a local clocktick */ unsigned long cpt = clocktick; @@ -69,7 +66,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) profile_tick(CPU_PROFILING); /* Initialize next_tick to the expected tick time. */ - next_tick = cpu_data[cpu].it_value; + next_tick = cpuinfo->it_value; /* Get current interval timer. * CR16 reads as 64 bits in CPU wide mode. @@ -120,7 +117,7 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) */ next_tick = now + cycles_remainder; - cpu_data[cpu].it_value = next_tick; + cpuinfo->it_value = next_tick; /* Skip one clocktick on purpose if we are likely to miss next_tick. * We want to avoid the new next_tick being less than CR16. @@ -131,18 +128,19 @@ irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) next_tick += cpt; /* Program the IT when to deliver the next interrupt. */ - /* Only bottom 32-bits of next_tick are written to cr16. */ + /* Only bottom 32-bits of next_tick are written to cr16. */ mtctl(next_tick, 16); /* Done mucking with unreliable delivery of interrupts. * Go do system house keeping. */ -#ifdef CONFIG_SMP - smp_do_timer(regs); -#else - update_process_times(user_mode(regs)); -#endif + + if (!--cpuinfo->prof_counter) { + cpuinfo->prof_counter = cpuinfo->prof_multiplier; + update_process_times(user_mode(get_irq_regs())); + } + if (cpu == 0) { write_seqlock(&xtime_lock); do_timer(ticks_elapsed); |