From f3ff102b867fa4bd10d2ab65b37fa60e9e2f5b57 Mon Sep 17 00:00:00 2001
From: Yinghao Xie <yinghao.xie@samsung.com>
Date: Wed, 15 Apr 2015 16:15:49 -0700
Subject: [PATCH] UPSTREAM: mm/zsmalloc.c: fix comment for get_pages_per_zspage

(cherry-pick from commit 888fa374e625f3ee8f3cc2efebf52939d3bb6da1)

Bug: 25951511

Change-Id: I94fc95aff6dcab3999c3dcb275ca65b8cd4b3565
Signed-off-by: Yinghao Xie <yinghao.xie@sumsung.com>
Suggested-by: Minchan Kim <minchan@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
 mm/zsmalloc.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index e4df4bb537af..8335e0ca6dab 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -732,7 +732,8 @@ out:
  * to form a zspage for each size class. This is important
  * to reduce wastage due to unusable space left at end of
  * each zspage which is given as:
- *	wastage = Zp - Zp % size_class
+ *     wastage = Zp % class_size
+ *     usage = Zp - wastage
  * where Zp = zspage size = k * PAGE_SIZE where k = 1, 2, ...
  *
  * For example, for size class of 3/8 * PAGE_SIZE, we should