[PATCH] mm/zsmalloc: fix comment in zsmalloc

[Yisheng Xie]

The class index and fullness group are not encoded in
(first)page->mapping any more, after commit 3783689a1aa8 ("zsmalloc:
introduce zspage structure"). Instead, they are store in struct zspage.

Cc: Minchan Kim <minchan@xxxxxxxxxx>
Cc: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Nitin Gupta <ngupta@xxxxxxxxxx>
Cc: Hanjun Guo <guohanjun@xxxxxxxxxx>
Signed-off-by: Yisheng Xie <xieyisheng1@xxxxxxxxxx>
---
 mm/zsmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 9cc3c0b..4b87225 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -270,7 +270,7 @@ struct zs_pool {
 
 /*
  * A zspage's class index and fullness group
- * are encoded in its (first)page->mapping
+ * are stored in struct zspage.
  */
 #define FULLNESS_BITS	2
 #define CLASS_BITS	8
-- 
1.7.12.4