release/src-rt-6.x.4708/linux/linux-2.6.36/include/net/netns/hash.h

   1 #ifndef __NET_NS_HASH_H__
   2 #define __NET_NS_HASH_H__
   3
   4 #include <asm/cache.h>
   5
   6 struct net;
   7
   8 static inline unsigned net_hash_mix(struct net *net)
   9 {
  10 #ifdef CONFIG_NET_NS
  11         /*
  12          * shift this right to eliminate bits, that are
  13          * always zeroed
  14          */
  15
  16         return (unsigned)(((unsigned long)net) >> L1_CACHE_SHIFT);
  17 #else
  18         return 0;
  19 #endif
  20 }
  21 #endif