* pointer or what ever, we treat it as a (void *). You can pass this
* id to a user for him to pass back at a later time. You then pass
* that id to this code and it returns your pointer.
-
- * You can release ids at any time. When all ids are released, most of
- * the memory is returned (we keep MAX_IDR_FREE) in a local pool so we
- * don't need to go to the memory "store" during an id allocate, just
- * so you don't need to be too concerned about locking and conflicts
- * with the slab allocator.
*/
#ifndef TEST // to test in user space...
static inline void free_layer(struct idr *idr, struct idr_layer *p)
{
- if (idr->hint && idr->hint == p)
+ if (idr->hint == p)
RCU_INIT_POINTER(idr->hint, NULL);
call_rcu(&p->rcu_head, idr_layer_rcu_free);
}
bitmap_clear(to_free->bitmap, 0, IDR_SIZE);
free_layer(idp, to_free);
}
- while (idp->id_free_cnt >= MAX_IDR_FREE) {
- p = get_from_free_list(idp);
- /*
- * Note: we don't call the rcu callback here, since the only
- * layers that fall into the freelist are those that have been
- * preallocated.
- */
- kmem_cache_free(idr_layer_cache, p);
- }
- return;
}
EXPORT_SYMBOL(idr_remove);
p = idp->top;
if (!p)
- return ERR_PTR(-EINVAL);
+ return ERR_PTR(-ENOENT);
if (id > idr_max(p->layer + 1))
- return ERR_PTR(-EINVAL);
+ return ERR_PTR(-ENOENT);
n = p->layer * IDR_BITS;
while ((n > 0) && p) {