mm/zsmalloc: fix comment in zsmalloc

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.

Just delete this unneeded comment.

Link: http://lkml.kernel.org/r/1486620822-36826-1-git-send-email-xieyisheng1@huawei.com
Signed-off-by: Yisheng Xie <xieyisheng1@huawei.com>
Suggested-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 25d0fb6443d1bea33eb6c51188c9391f6b5a12a8..b7b1fb6c8c21d4d4d1c6b7cc17f179e062dce94b 100644 (file)
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -267,10 +267,6 @@ struct zs_pool {
 #endif
 };
 
-/*
- * A zspage's class index and fullness group
- * are encoded in its (first)page->mapping
- */
 #define FULLNESS_BITS  2
 #define CLASS_BITS     8
 #define ISOLATED_BITS  3