unsigned long __get_wchan()

in kernel/process.c [220:238]

• 18 lines of code
• 5 McCabe index (conditional complexity)

unsigned long __get_wchan(struct task_struct *p)
{
	unsigned long fp, pc;
	unsigned long stack_page;
	int count = 0;

	stack_page = (unsigned long)p;
	fp = ((struct switch_stack *)p->thread.ksp)->fp;	/* ;dgt2 */
	do {
		if (fp < stack_page+sizeof(struct task_struct) ||
			fp >= 8184+stack_page)	/* ;dgt2;tmp */
			return 0;
		pc = ((unsigned long *)fp)[1];
		if (!in_sched_functions(pc))
			return pc;
		fp = *(unsigned long *) fp;
	} while (count++ < 16);		/* ;dgt2;tmp */
	return 0;
}