0fb90297dc
Before:
total: 3 errors, 0 warnings, 69 lines checked
After:
total: 0 errors, 0 warnings, 69 lines checked
No code changed:
arch/x86/oprofile/nmi_timer_int.o:
text data bss dec hex filename
180 12 0 192 c0 nmi_timer_int.o.before
180 12 0 192 c0 nmi_timer_int.o.after
md5:
0433c31d758e81da574e01722a8036ea nmi_timer_int.o.before.asm
0433c31d758e81da574e01722a8036ea nmi_timer_int.o.after.asm
Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
70 lines
1.4 KiB
C
70 lines
1.4 KiB
C
/**
|
|
* @file nmi_timer_int.c
|
|
*
|
|
* @remark Copyright 2003 OProfile authors
|
|
* @remark Read the file COPYING
|
|
*
|
|
* @author Zwane Mwaikambo <zwane@linuxpower.ca>
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/oprofile.h>
|
|
#include <linux/rcupdate.h>
|
|
#include <linux/kdebug.h>
|
|
|
|
#include <asm/nmi.h>
|
|
#include <asm/apic.h>
|
|
#include <asm/ptrace.h>
|
|
|
|
static int profile_timer_exceptions_notify(struct notifier_block *self,
|
|
unsigned long val, void *data)
|
|
{
|
|
struct die_args *args = (struct die_args *)data;
|
|
int ret = NOTIFY_DONE;
|
|
|
|
switch (val) {
|
|
case DIE_NMI:
|
|
oprofile_add_sample(args->regs, 0);
|
|
ret = NOTIFY_STOP;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static struct notifier_block profile_timer_exceptions_nb = {
|
|
.notifier_call = profile_timer_exceptions_notify,
|
|
.next = NULL,
|
|
.priority = 0
|
|
};
|
|
|
|
static int timer_start(void)
|
|
{
|
|
if (register_die_notifier(&profile_timer_exceptions_nb))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
|
|
static void timer_stop(void)
|
|
{
|
|
unregister_die_notifier(&profile_timer_exceptions_nb);
|
|
synchronize_sched(); /* Allow already-started NMIs to complete. */
|
|
}
|
|
|
|
|
|
int __init op_nmi_timer_init(struct oprofile_operations *ops)
|
|
{
|
|
if ((nmi_watchdog != NMI_IO_APIC) || (atomic_read(&nmi_active) <= 0))
|
|
return -ENODEV;
|
|
|
|
ops->start = timer_start;
|
|
ops->stop = timer_stop;
|
|
ops->cpu_type = "timer";
|
|
printk(KERN_INFO "oprofile: using NMI timer interrupt.\n");
|
|
return 0;
|
|
}
|