// SPDX-License-Identifier: GPL-2.0
/* 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/memblock.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 = kzalloc(sz, GFP_KERNEL);
        else if (hashdist)
                n = vzalloc(sz);
        else
                n = (struct hlist_head *)
                        __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO,
                                         get_order(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));
}