| 1 | |
| 2 | |
| 3 | * Timer tick function for architectures that lack generic clockevents,
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| 4 | * consolidated here from m68k/ia64/parisc/arm.
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| 5 |
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| 6 |
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| 7 | #include <linux/irq.h>
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| 8 | #include <linux/profile.h>
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| 9 | #include <linux/timekeeper_internal.h>
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| 10 |
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| 11 | #include "tick-internal.h"
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| 12 |
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| 13 | |
| 14 | * legacy_timer_tick() - advances the timekeeping infrastructure
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| 15 | * @ticks: number of ticks, that have elapsed since the last call.
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| 16 | *
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| 17 | * This is used by platforms that have not been converted to
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| 18 | * generic clockevents.
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| 19 | *
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| 20 | * If 'ticks' is zero, the CPU is not handling timekeeping, so
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| 21 | * only perform process accounting and profiling.
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| 22 | *
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| 23 | * Must be called with interrupts disabled.
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| 24 |
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| 25 | void legacy_timer_tick(unsigned long ticks)
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| 26 | {
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| 27 | if (ticks) {
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| 28 | raw_spin_lock(&jiffies_lock);
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| 29 | write_seqcount_begin(&jiffies_seq);
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| 30 | do_timer(ticks);
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| 31 | write_seqcount_end(&jiffies_seq);
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| 32 | raw_spin_unlock(&jiffies_lock);
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| 33 | update_wall_time();
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| 34 | }
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| 35 | update_process_times(user_mode(get_irq_regs()));
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| 36 | profile_tick(CPU_PROFILING);
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| 37 | }
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