void show_stack()

in kernel/traps.c [115:156]
30 lines of code
8 McCabe index (conditional complexity)

void show_stack(struct task_struct *task, unsigned long *esp, const char *loglvl)
{
	unsigned long *stack,  addr;
	int i;

	if (esp == NULL)
		esp = (unsigned long *) &esp;

	stack = esp;

	printk("%sStack from %08lx:", loglvl, (unsigned long)stack);
	for (i = 0; i < kstack_depth_to_print; i++) {
		if (((unsigned long)stack & (THREAD_SIZE - 1)) >=
		    THREAD_SIZE-4)
			break;
		if (i % 8 == 0)
			printk("%s ", loglvl);
		pr_cont(" %08lx", *stack++);
	}

	printk("%s\nCall Trace:\n", loglvl);
	i = 0;
	stack = esp;
	while (((unsigned long)stack & (THREAD_SIZE - 1)) < THREAD_SIZE-4) {
		addr = *stack++;
		/*
		 * If the address is either in the text segment of the
		 * kernel, or in the region which contains vmalloc'ed
		 * memory, it *may* be the address of a calling
		 * routine; if so, print it so that someone tracing
		 * down the cause of the crash will be able to figure
		 * out the call path that was taken.
		 */
		if (check_kernel_text(addr)) {
			if (i % 4 == 0)
				printk("%s       ", loglvl);
			pr_cont(" [<%08lx>]", addr);
			i++;
		}
	}
	printk("%s\n", loglvl);
}