LXR linux/net/xfrm/xfrm

   1/* xfrm_hash.c: Common hash table code.
   2 *
   3 * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
   4 */
   5
   6#include <linux/kernel.h>
   7#include <linux/mm.h>
   8#include <linux/bootmem.h>
   9#include <linux/vmalloc.h>
  10#include <linux/slab.h>
  11#include <linux/xfrm.h>
  12
  13#include "xfrm_hash.h"
  14
  15struct hlist_head *xfrm_hash_alloc(unsigned int sz)
  16{
  17        struct hlist_head *n;
  18
  19        if (sz <= PAGE_SIZE)
  20                n = kzalloc(sz, GFP_KERNEL);
  21        else if (hashdist)
  22                n = vzalloc(sz);
  23        else
  24                n = (struct hlist_head *)
  25                        __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
  26                                         get_order(sz));
  27
  28        return n;
  29}
  30
  31void xfrm_hash_free(struct hlist_head *n, unsigned int sz)
  32{
  33        if (sz <= PAGE_SIZE)
  34                kfree(n);
  35        else if (hashdist)
  36                vfree(n);
  37        else
  38                free_pages((unsigned long)n, get_order(sz));
  39}
  40