#ifndef _LINUX_FRAME_H
  #define _LINUX_FRAME_H
  
  #ifdef CONFIG_STACK_VALIDATION
  /*
   * This macro marks the given function's stack frame as "non-standard", which
   * tells objtool to ignore the function when doing stack metadata validation.
   * It should only be used in special cases where you're 100% sure it won't
   * affect the reliability of frame pointers and kernel stack traces.
   *
   * For more information, see tools/objtool/Documentation/stack-validation.txt.
   */
  #define STACK_FRAME_NON_STANDARD(func) \
  	static void __used __section(__func_stack_frame_non_standard) \
  		*__func_stack_frame_non_standard_##func = func
  
  #else /* !CONFIG_STACK_VALIDATION */
  
  #define STACK_FRAME_NON_STANDARD(func)
  
  #endif /* CONFIG_STACK_VALIDATION */
  
  #endif /* _LINUX_FRAME_H */