| 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(size: sz, GFP_KERNEL); |
| 22 | else if (hashdist) |
| 23 | n = vzalloc(size: sz); |
| 24 | else |
| 25 | n = (struct hlist_head *) |
| 26 | __get_free_pages(GFP_KERNEL | __GFP_NOWARN | __GFP_ZERO, |
| 27 | order: get_order(size: 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(objp: n); |
| 36 | else if (hashdist) |
| 37 | vfree(addr: n); |
| 38 | else |
| 39 | free_pages(addr: (unsigned long)n, order: get_order(size: sz)); |
| 40 | } |
| 41 |