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-rw-r--r--include/linux/genalloc.h1
-rw-r--r--lib/genalloc.c30
2 files changed, 31 insertions, 0 deletions
diff --git a/include/linux/genalloc.h b/include/linux/genalloc.h
index 690c428..9869ef3 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 71338b4..7d16eca 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.
*