hash.h

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#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