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- /*
- * 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);
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