#ifndef __LINUX_STACKTRACE_H
  #define __LINUX_STACKTRACE_H
  
  #ifdef CONFIG_STACKTRACE
  struct stack_trace {
  	unsigned int nr_entries, max_entries;
  	unsigned long *entries;

  	int skip;	/* input argument: How many entries to skip */

  };

  extern void save_stack_trace(struct stack_trace *trace);

  
  extern void print_stack_trace(struct stack_trace *trace, int spaces);
  #else

  # define save_stack_trace(trace)			do { } while (0)

  # define print_stack_trace(trace, spaces)		do { } while (0)

  #endif
  
  #endif