[PATCH 4/6] zsmalloc: add/fix function comment

[Minchan Kim <minchan@kernel.org>]

Add/fix the comment.

Signed-off-by: Minchan Kim <minchan@kernel.org>
---
 drivers/staging/zsmalloc/zsmalloc-main.c |   15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/zsmalloc/zsmalloc-main.c b/drivers/staging/zsmalloc/zsmalloc-main.c
index 0fe4cbb..b7d31cc 100644
--- a/drivers/staging/zsmalloc/zsmalloc-main.c
+++ b/drivers/staging/zsmalloc/zsmalloc-main.c
@@ -565,12 +565,9 @@ EXPORT_SYMBOL_GPL(zs_destroy_pool);
  * zs_malloc - Allocate block of given size from pool.
  * @pool: pool to allocate from
  * @size: size of block to allocate
- * @page: page no. that holds the object
- * @offset: location of object within page
  *
  * On success, <page, offset> identifies block allocated
- * and 0 is returned. On failure, <page, offset> is set to
- * 0 and -ENOMEM is returned.
+ * and <page, offset> is returned. On failure, NULL is returned.
  *
  * Allocation requests with size > ZS_MAX_ALLOC_SIZE will fail.
  */
@@ -666,6 +663,16 @@ void zs_free(struct zs_pool *pool, void *obj)
 }
 EXPORT_SYMBOL_GPL(zs_free);
 
+/**
+ * zs_map_object - get address of allocated object from handle.
+ * @pool: object allocated pool
+ * @handle: handle returned from zs_malloc
+ *
+ * Before using object allocated from zs_malloc, object
+ * should be mapped to page table by this function.
+ * After using object,  call zs_unmap_object to unmap page
+ * table.
+ */
 void *zs_map_object(struct zs_pool *pool, void *handle)
 {
 	struct page *page;
-- 
1.7.9.5