コード例 #1
0
ファイル: timer.c プロジェクト: goumuli/GridOS
static int __cpuinit init_timers_cpu(int cpu)
{
	int j;
	struct tvec_base *base;
	static char __cpuinitdata tvec_base_done[NR_CPUS];
	
	if (!tvec_base_done[cpu]) {
		static char boot_done;
		
		if (boot_done) {
			/*
			 * The APs use this path later in boot
			 */
			base = kmalloc_node(sizeof(*base),
							  GFP_KERNEL | __GFP_ZERO,
							  cpu_to_node(cpu));
			if (!base)
				return -ENOMEM;
			
			/* Make sure that tvec_base is 2 byte aligned */
			if (tbase_get_deferrable(base)) {
				WARN_ON(1);
				kfree(base);
				return -ENOMEM;
			}
			per_cpu(tvec_bases, cpu) = base;
		} else {
			/*
			 * This is for the boot CPU - we use compile-time
			 * static initialisation because per-cpu memory isn't
			 * ready yet and because the memory allocators are not
			 * initialised either.
			 */
			boot_done = 1;
			base = &boot_tvec_bases;
			per_cpu(tvec_bases, cpu) = base;
		}
		tvec_base_done[cpu] = 1;
	} else {
		base = per_cpu(tvec_bases, cpu);
	}
	
	spin_lock_init(&base->lock);
	
	for (j = 0; j < TVN_SIZE; j++) {
		INIT_LIST_HEAD(base->tv5.vec + j);
		INIT_LIST_HEAD(base->tv4.vec + j);
		INIT_LIST_HEAD(base->tv3.vec + j);
		INIT_LIST_HEAD(base->tv2.vec + j);
	}
	for (j = 0; j < TVR_SIZE; j++)
		INIT_LIST_HEAD(base->tv1.vec + j);
	
	base->timer_jiffies = jiffies;
	base->next_timer = base->timer_jiffies;
	base->active_timers = 0;
	return 0;
}
コード例 #2
0
ファイル: timer.c プロジェクト: goumuli/GridOS
static int detach_if_pending(struct timer_list *timer, struct tvec_base *base,
							 bool clear_pending)
{
	if (!timer_pending(timer))
		return 0;
	
	detach_timer(timer, clear_pending);
	if (!tbase_get_deferrable(timer->base)) {
		base->active_timers--;
		if (timer->expires == base->next_timer)
			base->next_timer = base->timer_jiffies;
	}
	return 1;
}
コード例 #3
0
static inline void
timer_set_base(struct timer_list *timer, struct tvec_base *new_base)
{
	timer->base = (struct tvec_base *)((unsigned long)(new_base) |
				      tbase_get_deferrable(timer->base));
}
コード例 #4
0
ファイル: timer.c プロジェクト: goumuli/GridOS
static inline void detach_expired_timer(struct timer_list *timer, struct tvec_base *base)
{
	detach_timer(timer, true);
	if (!tbase_get_deferrable(timer->base))
		base->active_timers--;
}