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Linux/net/xfrm/xfrm_hash.c

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  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 
 15 struct 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 
 31 void 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 

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