95 lines
2.0 KiB
C
95 lines
2.0 KiB
C
/*
|
|
*
|
|
* (C) COPYRIGHT 2014, 2017 ARM Limited. All rights reserved.
|
|
*
|
|
* This program is free software and is provided to you under the terms of the
|
|
* GNU General Public License version 2 as published by the Free Software
|
|
* Foundation, and any use by you of this program is subject to the terms
|
|
* of such GNU licence.
|
|
*
|
|
* A copy of the licence is included with the program, and can also be obtained
|
|
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*
|
|
*/
|
|
|
|
|
|
|
|
/* Kernel UTF memory management functions */
|
|
|
|
#include <linux/list.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/module.h>
|
|
|
|
#include <kutf/kutf_mem.h>
|
|
|
|
|
|
/**
|
|
* struct kutf_alloc_entry - Structure representing an allocation.
|
|
* @node: List node for use with kutf_mempool.
|
|
* @data: Data area of the allocation
|
|
*/
|
|
struct kutf_alloc_entry {
|
|
struct list_head node;
|
|
u8 data[0];
|
|
};
|
|
|
|
int kutf_mempool_init(struct kutf_mempool *pool)
|
|
{
|
|
if (!pool) {
|
|
pr_err("NULL pointer passed to %s\n", __func__);
|
|
return -1;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&pool->head);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kutf_mempool_init);
|
|
|
|
void kutf_mempool_destroy(struct kutf_mempool *pool)
|
|
{
|
|
struct list_head *remove;
|
|
struct list_head *tmp;
|
|
|
|
if (!pool) {
|
|
pr_err("NULL pointer passed to %s\n", __func__);
|
|
return;
|
|
}
|
|
|
|
list_for_each_safe(remove, tmp, &pool->head) {
|
|
struct kutf_alloc_entry *remove_alloc;
|
|
|
|
remove_alloc = list_entry(remove, struct kutf_alloc_entry, node);
|
|
list_del(&remove_alloc->node);
|
|
kfree(remove_alloc);
|
|
}
|
|
}
|
|
EXPORT_SYMBOL(kutf_mempool_destroy);
|
|
|
|
void *kutf_mempool_alloc(struct kutf_mempool *pool, size_t size)
|
|
{
|
|
struct kutf_alloc_entry *ret;
|
|
|
|
if (!pool) {
|
|
pr_err("NULL pointer passed to %s\n", __func__);
|
|
goto fail_pool;
|
|
}
|
|
|
|
ret = kmalloc(sizeof(*ret) + size, GFP_KERNEL);
|
|
if (!ret) {
|
|
pr_err("Failed to allocate memory\n");
|
|
goto fail_alloc;
|
|
}
|
|
|
|
INIT_LIST_HEAD(&ret->node);
|
|
list_add(&ret->node, &pool->head);
|
|
|
|
return &ret->data[0];
|
|
|
|
fail_alloc:
|
|
fail_pool:
|
|
return NULL;
|
|
}
|
|
EXPORT_SYMBOL(kutf_mempool_alloc);
|