xfrm_hash.c

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/* xfrm_hash.c: Common hash table code.
 *
 * Copyright (C) 2006 David S. Miller ([email protected])
 */

#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 = 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));
}