[PATCH] zsmalloc: fix linking bug in init_zspage

[zhouxianrong]

The last partial object in last subpage of zspage should not be linked
in allocation list.

Signed-off-by: zhouxianrong <zhouxianrong@xxxxxxx>
---
 mm/zsmalloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 8d87e973a4f5..24dd8da0aa59 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -1040,6 +1040,8 @@ static void init_zspage(struct size_class *class, struct zspage *zspage)
 			 * Reset OBJ_TAG_BITS bit to last link to tell
 			 * whether it's allocated object or not.
 			 */
+			if (off > PAGE_SIZE)
+				link -= class->size / sizeof(*link);
 			link->next = -1UL << OBJ_TAG_BITS;
 		}
 		kunmap_atomic(vaddr);
-- 
2.13.6