android_kernel_xiaomi_sm8350/arch/i386/oprofile/nmi_timer_int.c
Paul E. McKenney fbd568a3e6 [PATCH] Change synchronize_kernel to _rcu and _sched
This patch changes calls to synchronize_kernel(), deprecated in the earlier
"Deprecate synchronize_kernel, GPL replacement" patch to instead call the new
synchronize_rcu() and synchronize_sched() APIs.

Signed-off-by: Paul E. McKenney <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-05-01 08:59:04 -07:00

56 lines
1.0 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/irq.h>
#include <linux/oprofile.h>
#include <linux/rcupdate.h>
#include <asm/nmi.h>
#include <asm/apic.h>
#include <asm/ptrace.h>
static int nmi_timer_callback(struct pt_regs * regs, int cpu)
{
oprofile_add_sample(regs, 0);
return 1;
}
static int timer_start(void)
{
disable_timer_nmi_watchdog();
set_nmi_callback(nmi_timer_callback);
return 0;
}
static void timer_stop(void)
{
enable_timer_nmi_watchdog();
unset_nmi_callback();
synchronize_sched(); /* Allow already-started NMIs to complete. */
}
int __init nmi_timer_init(struct oprofile_operations * ops)
{
extern int nmi_active;
if (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;
}