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