/* * kernel/stacktrace.c * * Stack trace management functions * *  Copyright (C) 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com> */#include <linux/sched.h>#include <linux/kernel.h>#include <linux/module.h>#include <linux/kallsyms.h>#include <linux/stacktrace.h> void print_stack_trace(struct stack_trace *trace, int spaces){	int i; 	if (WARN_ON(!trace->entries))		return; 	for (i = 0; i < trace->nr_entries; i++) {		printk("%*c", 1 + spaces, ' ');		print_ip_sym(trace->entries[i]);	}}EXPORT_SYMBOL_GPL(print_stack_trace); /* * Architectures that do not implement save_stack_trace_tsk or * save_stack_trace_regs get this weak alias and a once-per-bootup warning * (whenever this facility is utilized - for example by procfs): */__weak voidsave_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace){	WARN_ONCE(1, KERN_INFO "save_stack_trace_tsk() not implemented yet.\n");} __weak voidsave_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace){	WARN_ONCE(1, KERN_INFO "save_stack_trace_regs() not implemented yet.\n");}