mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-28 20:37:27 +00:00
0b4419162a
There are many possible ways to add this "salt", thus I made this patch to be the last in the series to change it if required. Currently I propose to use the struct net pointer itself as this salt, but since this pointer is most often cache-line aligned, shift this right to eliminate the bits, that are most often zeroed. After this, simply add this mix to prepared hashfn-s. For CONFIG_NET_NS=n case this salt is 0 and no changes in hashfn appear. Signed-off-by: Pavel Emelyanov <xemul@openvz.org> Signed-off-by: David S. Miller <davem@davemloft.net>
22 lines
336 B
C
22 lines
336 B
C
#ifndef __NET_NS_HASH_H__
|
|
#define __NET_NS_HASH_H__
|
|
|
|
#include <asm/cache.h>
|
|
|
|
struct net;
|
|
|
|
static inline unsigned 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
|