/* * 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 source code is licensed under the GNU General Public License, * Version 2.  See the file COPYING for more details. *//* *  General purpose special memory pool descriptor. */struct gen_pool {	rwlock_t lock;	struct list_head chunks;	/* list of chunks in this pool */	int min_alloc_order;		/* minimum allocation order */};/* *  General purpose special memory pool chunk descriptor. */struct gen_pool_chunk {	spinlock_t lock;	struct list_head next_chunk;	/* next chunk in pool */	unsigned long start_addr;	/* starting address of memory chunk */	unsigned long end_addr;		/* ending address of memory chunk */	unsigned long bits[0];		/* bitmap for allocating memory chunk */};extern struct gen_pool *gen_pool_create(int, int);extern int gen_pool_add(struct gen_pool *, unsigned long, size_t, int);extern void gen_pool_destroy(struct gen_pool *);extern unsigned long gen_pool_alloc(struct gen_pool *, size_t);extern void gen_pool_free(struct gen_pool *, unsigned long, size_t);