// 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);}