/*
- * linux/arch/x86-64/kernel/process.c
- *
* Copyright (C) 1995 Linus Torvalds
*
* Pentium III FXSR, SSE support
#include <linux/notifier.h>
#include <linux/kprobes.h>
#include <linux/kdebug.h>
+#include <linux/tick.h>
#include <asm/uaccess.h>
#include <asm/pgtable.h>
cpu_relax();
}
+static void do_nothing(void *unused)
+{
+}
+
void cpu_idle_wait(void)
{
unsigned int cpu, this_cpu = get_cpu();
cpu_clear(cpu, map);
}
cpus_and(map, map, cpu_online_map);
+ /*
+ * We waited 1 sec, if a CPU still did not call idle
+ * it may be because it is in idle and not waking up
+ * because it has nothing to do.
+ * Give all the remaining CPUS a kick.
+ */
+ smp_call_function_mask(map, do_nothing, 0, 0);
} while (!cpus_empty(map));
set_cpus_allowed(current, tmp);
if (__get_cpu_var(cpu_idle_state))
__get_cpu_var(cpu_idle_state) = 0;
+ tick_nohz_stop_sched_tick();
+
rmb();
idle = pm_idle;
if (!idle)
__exit_idle();
}
+ tick_nohz_restart_sched_tick();
preempt_enable_no_resched();
schedule();
preempt_disable();
*
* Kprobes not supported here. Set the probe on schedule instead.
*/
-__kprobes struct task_struct *
+struct task_struct *
__switch_to(struct task_struct *prev_p, struct task_struct *next_p)
{
struct thread_struct *prev = &prev_p->thread,