/* * 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);