 /* This does not unfreeze processes that are already frozen * (we have slightly ugly calling convention in that respect, * and caller must call thaw_processes() if something fails), * but it cleans up leftover PF_FREEZE requests. */ if (todo) { read_lock(&tasklist_lock); do_each_thread(g, p) if (freezing(p)) { pr_debug("  clean up: %s\n", p->comm); p->flags &= ~PF_FREEZE; spin_lock_irqsave(&p->sighand->siglock, flags); recalc_sigpending_tsk(p); spin_unlock_irqrestore(&p->sighand->siglock, flags); } while_each_thread(g, p); read_unlock(&tasklist_lock); return todo; } 
int freeze_processes(void){	int todo;	unsigned long start_time;	struct task_struct *g, *p;	unsigned long flags;	printk( "Stopping tasks: " );	start_time = jiffies;	do {		todo = 0;		read_lock(&tasklist_lock);		do_each_thread(g, p) {			if (!freezeable(p))				continue;			if (frozen(p))				continue;			freeze(p);			spin_lock_irqsave(&p->sighand->siglock, flags);			signal_wake_up(p, 0);			spin_unlock_irqrestore(&p->sighand->siglock, flags);			todo++;		} while_each_thread(g, p);		read_unlock(&tasklist_lock);		yield();			/* Yield is okay here */		if (time_after(jiffies, start_time + TIMEOUT)) {			printk( "\n" );			printk(KERN_ERR " stopping tasks failed (%d tasks remaining)\n", todo );			return todo;		}	} while(todo);	printk( "|\n" );	BUG_ON(in_atomic());	return 0;}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/6161b2ce8116b9a623260ab811e2c035b3fac2e5/process.c/clean/kernel/power/process.c