#ifndef __NET_NS_HASH_H__
  #define __NET_NS_HASH_H__
  
  #include <asm/cache.h>
  
  struct net;
  
  static inline unsigned int net_hash_mix(struct net *net)
  {
  #ifdef CONFIG_NET_NS
  	/*
  	 * shift this right to eliminate bits, that are
  	 * always zeroed
  	 */
  
  	return (unsigned)(((unsigned long)net) >> L1_CACHE_SHIFT);
  #else
  	return 0;
  #endif
  }
  #endif