322acc96d4
Modules using the genpool allocator need to be able to destroy the data structure when unloading. Signed-off-by: Steve Wise <swise@opengridcomputing.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Dean Nelson <dcn@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
36 lines
1.2 KiB
C
36 lines
1.2 KiB
C
/*
|
|
* 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);
|