linux-kernel - [PATCH v2] mm/zsmalloc: fix comment in zsmalloc

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Date:   Thu, 9 Feb 2017 14:13:42 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <akpm@...ux-foundation.org>
CC:     <linux-mm@...ck.org>, <linux-kernel@...r.kernel.org>,
        <minchan@...nel.org>, <sergey.senozhatsky@...il.com>,
        <ngupta@...are.org>, <guohanjun@...wei.com>
Subject: [PATCH v2] 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.

Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
Suggested-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Cc: Minchan Kim <minchan@...nel.org>
Cc: Nitin Gupta <ngupta@...are.org>
Cc: Hanjun Guo <guohanjun@...wei.com>
---
v2:
 * just delete the comment for it is no need anymore, suggested by Sergey.

 mm/zsmalloc.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 9cc3c0b..08c1a84 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -268,10 +268,6 @@ 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
-- 
1.7.12.4