Revision d84970bbaf9a09b3fc60c18ee6d59bc9cb4c3b8a authored by Nicolas Pitre on 31 May 2012, 23:26:07 UTC, committed by Linus Torvalds on 01 June 2012, 00:49:27 UTC
Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Colin Cross <ccross@android.com> Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1 parent 97fd75b
smpboot.c
/*
* Common SMP CPU bringup/teardown functions
*/
#include <linux/err.h>
#include <linux/smp.h>
#include <linux/init.h>
#include <linux/sched.h>
#include <linux/percpu.h>
#include "smpboot.h"
#ifdef CONFIG_GENERIC_SMP_IDLE_THREAD
/*
* For the hotplug case we keep the task structs around and reuse
* them.
*/
static DEFINE_PER_CPU(struct task_struct *, idle_threads);
struct task_struct * __cpuinit idle_thread_get(unsigned int cpu)
{
struct task_struct *tsk = per_cpu(idle_threads, cpu);
if (!tsk)
return ERR_PTR(-ENOMEM);
init_idle(tsk, cpu);
return tsk;
}
void __init idle_thread_set_boot_cpu(void)
{
per_cpu(idle_threads, smp_processor_id()) = current;
}
static inline void idle_init(unsigned int cpu)
{
struct task_struct *tsk = per_cpu(idle_threads, cpu);
if (!tsk) {
tsk = fork_idle(cpu);
if (IS_ERR(tsk))
pr_err("SMP: fork_idle() failed for CPU %u\n", cpu);
else
per_cpu(idle_threads, cpu) = tsk;
}
}
/**
* idle_thread_init - Initialize the idle thread for a cpu
* @cpu: The cpu for which the idle thread should be initialized
*
* Creates the thread if it does not exist.
*/
void __init idle_threads_init(void)
{
unsigned int cpu;
for_each_possible_cpu(cpu) {
if (cpu != smp_processor_id())
idle_init(cpu);
}
}
#endif
![swh spinner](/static/img/swh-spinner.gif)
Computing file changes ...