Commit 6589c93f authored by Sven Schnelle's avatar Sven Schnelle Committed by Heiko Carstens
Browse files

s390: add trace events for idle enter/exit 



Helpful for debugging.

Signed-off-by: default avatarSven Schnelle <svens@linux.ibm.com>
Reviewed-by: default avatarHeiko Carstens <hca@linux.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent 7b7735c5

arch/s390/kernel/idle.c

+3 −1
Original line number Original line Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/init.h>

#include <linux/init.h>

#include <linux/cpu.h>

#include <linux/cpu.h>

#include <linux/sched/cputime.h>

#include <linux/sched/cputime.h>

#include <trace/events/power.h>

#include <asm/nmi.h>

#include <asm/nmi.h>

#include <asm/smp.h>

#include <asm/smp.h>

#include "entry.h"

#include "entry.h"
@@ -32,11 +33,12 @@ void enabled_wait(void) 
		PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;

		PSW_MASK_IO | PSW_MASK_EXT | PSW_MASK_MCHECK;

	clear_cpu_flag(CIF_NOHZ_DELAY);

	clear_cpu_flag(CIF_NOHZ_DELAY);





	trace_cpu_idle_rcuidle(1, smp_processor_id());

	local_irq_save(flags);

	local_irq_save(flags);

	/* Call the assembler magic in entry.S */

	/* Call the assembler magic in entry.S */

	psw_idle(idle, psw_mask);

	psw_idle(idle, psw_mask);

	local_irq_restore(flags);

	local_irq_restore(flags);



	trace_cpu_idle_rcuidle(PWR_EVENT_EXIT, smp_processor_id());





	/* Account time spent with enabled wait psw loaded as idle time. */

	/* Account time spent with enabled wait psw loaded as idle time. */

	write_seqcount_begin(&idle->seqcount);

	write_seqcount_begin(&idle->seqcount);