add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/s390/kernel/idle.c
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@@ -14,6 +14,7 @@
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 #include <linux/init.h>
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 #include <linux/cpu.h>
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 #include <linux/sched/cputime.h>
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+#include <trace/events/power.h>
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 #include <asm/nmi.h>
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 #include <asm/smp.h>
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 #include "entry.h"
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@@ -24,28 +25,27 @@
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 {
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 	struct s390_idle_data *idle = this_cpu_ptr(&s390_idle);
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 	unsigned long long idle_time;
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-	unsigned long psw_mask;
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+	unsigned long psw_mask, flags;
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-	trace_hardirqs_on();
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 	/* Wait for external, I/O or machine check interrupt. */
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 	psw_mask = PSW_KERNEL_BITS | PSW_MASK_WAIT | PSW_MASK_DAT |
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 		PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;
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 	clear_cpu_flag(CIF_NOHZ_DELAY);
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+	raw_local_irq_save(flags);
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 	/* Call the assembler magic in entry.S */
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 	psw_idle(idle, psw_mask);
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-
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-	trace_hardirqs_off();
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+	raw_local_irq_restore(flags);
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 	/* Account time spent with enabled wait psw loaded as idle time. */
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-	write_seqcount_begin(&idle->seqcount);
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+	raw_write_seqcount_begin(&idle->seqcount);
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 	idle_time = idle->clock_idle_exit - idle->clock_idle_enter;
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 	idle->clock_idle_enter = idle->clock_idle_exit = 0ULL;
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 	idle->idle_time += idle_time;
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 	idle->idle_count++;
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 	account_idle_time(cputime_to_nsecs(idle_time));
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-	write_seqcount_end(&idle->seqcount);
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+	raw_write_seqcount_end(&idle->seqcount);
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 }
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 NOKPROBE_SYMBOL(enabled_wait);
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@@ -118,22 +118,16 @@
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 void arch_cpu_idle_enter(void)
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 {
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-	local_mcck_disable();
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 }
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 void arch_cpu_idle(void)
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 {
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-	if (!test_cpu_flag(CIF_MCCK_PENDING))
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-		/* Halt the cpu and keep track of cpu time accounting. */
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-		enabled_wait();
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-	local_irq_enable();
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+	enabled_wait();
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+	raw_local_irq_enable();
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 }
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 void arch_cpu_idle_exit(void)
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 {
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-	local_mcck_enable();
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-	if (test_cpu_flag(CIF_MCCK_PENDING))
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-		s390_handle_mcck();
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 }
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 void arch_cpu_idle_dead(void)