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/* xfrm_hash.c: Common hash table code.

 *

 * Copyright (C) 2006 David S. Miller (davem@davemloft.net)

 */

#include <linux/kernel.h>

#include <linux/mm.h>

#include <linux/bootmem.h>

#include <linux/vmalloc.h>

#include <linux/slab.h>

#include <linux/xfrm.h>

#include "xfrm_hash.h"

struct hlist_head *xfrm_hash_alloc(unsigned int sz)

{

        struct hlist_head *n;

        if (sz <= PAGE_SIZE)

                n = kmalloc(sz, GFP_KERNEL);

        else if (hashdist)

                n = __vmalloc(sz, GFP_KERNEL, PAGE_KERNEL);

        else

                n = (struct hlist_head *)

                        __get_free_pages(GFP_KERNEL | __GFP_NOWARN,

                                         get_order(sz));

        if (n)

                memset(n, 0, sz);

        return n;

}

void xfrm_hash_free(struct hlist_head *n, unsigned int sz)

{

        if (sz <= PAGE_SIZE)

                kfree(n);

        else if (hashdist)

                vfree(n);

        else

                free_pages((unsigned long)n, get_order(sz));

}