38 lines
999 B
C
38 lines
999 B
C
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// SPDX-License-Identifier: GPL-2.0
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/*
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* Timer tick function for architectures that lack generic clockevents,
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* consolidated here from m68k/ia64/parisc/arm.
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*/
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#include <linux/irq.h>
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#include <linux/profile.h>
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#include <linux/timekeeper_internal.h>
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#include "tick-internal.h"
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/**
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* legacy_timer_tick() - advances the timekeeping infrastructure
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* @ticks: number of ticks, that have elapsed since the last call.
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*
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* This is used by platforms that have not been converted to
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* generic clockevents.
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*
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* If 'ticks' is zero, the CPU is not handling timekeeping, so
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* only perform process accounting and profiling.
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*
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* Must be called with interrupts disabled.
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*/
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void legacy_timer_tick(unsigned long ticks)
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{
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if (ticks) {
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raw_spin_lock(&jiffies_lock);
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write_seqcount_begin(&jiffies_seq);
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do_timer(ticks);
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write_seqcount_end(&jiffies_seq);
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raw_spin_unlock(&jiffies_lock);
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update_wall_time();
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}
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update_process_times(user_mode(get_irq_regs()));
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profile_tick(CPU_PROFILING);
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}
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