net/xfrm/xfrm_hash.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* xfrm_hash.c: Common hash table code.
   3  *
   4  * Copyright (C) 2006 David S. Miller (davem@davemloft.net)
   5  */
   6
   7 #include <linux/kernel.h>
   8 #include <linux/mm.h>
   9 #include <linux/memblock.h>
  10 #include <linux/vmalloc.h>
  11 #include <linux/slab.h>
  12 #include <linux/xfrm.h>
  13
  14 #include "xfrm_hash.h"
  15
  16 struct hlist_head *xfrm_hash_alloc(unsigned int sz)
  17 {
  18         struct hlist_head *n;
  19
  20         if (sz <= PAGE_SIZE)
  21                 n = kzalloc(sz, GFP_KERNEL);
  22         else if (hashdist)
  23                 n = vzalloc(sz);
  24         else
  25                 n = (struct hlist_head *)
  26                         __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
  27                                          get_order(sz));
  28
  29         return n;
  30 }
  31
  32 void xfrm_hash_free(struct hlist_head *n, unsigned int sz)
  33 {
  34         if (sz <= PAGE_SIZE)
  35                 kfree(n);
  36         else if (hashdist)
  37                 vfree(n);
  38         else
  39                 free_pages((unsigned long)n, get_order(sz));
  40 }