#ifndef __ASM_GENERIC_TLBFLUSH_H
  #define __ASM_GENERIC_TLBFLUSH_H
  /*
   * This is a dummy tlbflush implementation that can be used on all
   * nommu architectures.
   * If you have an MMU, you need to write your own functions.
   */
  #ifdef CONFIG_MMU
  #error need to implement an architecture specific asm/tlbflush.h
  #endif
  
  #include <linux/bug.h>
  
  static inline void flush_tlb_mm(struct mm_struct *mm)
  {
  	BUG();
  }
  
  
  #endif /* __ASM_GENERIC_TLBFLUSH_H */