diff options
| author | Steve Wise <swise@opengridcomputing.com> | 2006-10-02 02:17:00 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-02 07:57:12 -0700 |
| commit | 322acc96d4bd3debea11cd0160b18bd5d7ff0d73 (patch) | |
| tree | 230e9c35e0ce4dac5bd1a49085152624045fb616 | |
| parent | d834c16516d1ebec4766fc58c059bf01311e6045 (diff) | |
[PATCH] LIB: add gen_pool_destroy()
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>
| -rw-r--r-- | include/linux/genalloc.h | 1 | ||||
| -rw-r--r-- | lib/genalloc.c | 30 |
2 files changed, 31 insertions, 0 deletions
diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h index 690c42803d2e..9869ef3674ac 100644 --- a/include/linux/genalloc.h +++ b/include/linux/genalloc.h @@ -31,5 +31,6 @@ struct gen_pool_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); diff --git a/lib/genalloc.c b/lib/genalloc.c index 71338b48e889..7d16ecabba96 100644 --- a/lib/genalloc.c +++ b/lib/genalloc.c @@ -71,6 +71,36 @@ EXPORT_SYMBOL(gen_pool_add); /* + * Destroy a memory pool. Verifies that there are no outstanding allocations. + * + * @pool: pool to destroy + */ +void gen_pool_destroy(struct gen_pool *pool) +{ + struct list_head *_chunk, *_next_chunk; + struct gen_pool_chunk *chunk; + int order = pool->min_alloc_order; + int bit, end_bit; + + + write_lock(&pool->lock); + list_for_each_safe(_chunk, _next_chunk, &pool->chunks) { + chunk = list_entry(_chunk, struct gen_pool_chunk, next_chunk); + list_del(&chunk->next_chunk); + + end_bit = (chunk->end_addr - chunk->start_addr) >> order; + bit = find_next_bit(chunk->bits, end_bit, 0); + BUG_ON(bit < end_bit); + + kfree(chunk); + } + kfree(pool); + return; +} +EXPORT_SYMBOL(gen_pool_destroy); + + +/* * Allocate the requested number of bytes from the specified pool. * Uses a first-fit algorithm. * |