genalloc.h
上传用户:szlgq88
上传日期:2009-04-28
资源大小:48287k
文件大小:1k
- /*
- * Basic general purpose allocator for managing special purpose memory
- * not managed by the regular kmalloc/kfree interface.
- * Uses for this includes on-device special memory, uncached memory
- * etc.
- *
- * This code is based on the buddy allocator found in the sym53c8xx_2
- * driver, adapted for general purpose use.
- *
- * This source code is licensed under the GNU General Public License,
- * Version 2. See the file COPYING for more details.
- */
- #include <linux/spinlock.h>
- #define ALLOC_MIN_SHIFT 5 /* 32 bytes minimum */
- /*
- * Link between free memory chunks of a given size.
- */
- struct gen_pool_link {
- struct gen_pool_link *next;
- };
- /*
- * Memory pool descriptor.
- */
- struct gen_pool {
- spinlock_t lock;
- unsigned long (*get_new_chunk)(struct gen_pool *);
- struct gen_pool *next;
- struct gen_pool_link *h;
- unsigned long private;
- int max_chunk_shift;
- };
- unsigned long gen_pool_alloc(struct gen_pool *poolp, int size);
- void gen_pool_free(struct gen_pool *mp, unsigned long ptr, int size);
- struct gen_pool *gen_pool_create(int nr_chunks, int max_chunk_shift,
- unsigned long (*fp)(struct gen_pool *),
- unsigned long data);