linux-kernel - [PATCH v2 02/10] zram: abolish macro SECTORS_PER

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Message-ID: <20200507075100.1779-3-thunder.leizhen@huawei.com>
Date:   Thu, 7 May 2020 15:50:52 +0800
From:   Zhen Lei <thunder.leizhen@...wei.com>
To:     Minchan Kim <minchan@...nel.org>, Nitin Gupta <ngupta@...are.org>,
        "Sergey Senozhatsky" <sergey.senozhatsky.work@...il.com>,
        Matthew Wilcox <willy@...radead.org>,
        Jens Axboe <axboe@...nel.dk>, Coly Li <colyli@...e.de>,
        Kent Overstreet <kent.overstreet@...il.com>,
        "Alasdair Kergon" <agk@...hat.com>,
        Mike Snitzer <snitzer@...hat.com>,
        linux-block <linux-block@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-mm <linux-mm@...ck.org>, dm-devel <dm-devel@...hat.com>,
        Song Liu <song@...nel.org>,
        linux-raid <linux-raid@...r.kernel.org>,
        linux-kernel <linux-kernel@...r.kernel.org>
CC:     Zhen Lei <thunder.leizhen@...wei.com>
Subject: [PATCH v2 02/10] zram: abolish macro SECTORS_PER_PAGE

SECTORS_PER_PAGE is equivalent to PAGE_SECTORS.

Although I prefer SECTORS_PER_PAGE better than PAGE_SECTORS, the former
is more clearer, I think. But the latter was defined in
<linux/device-mapper.h> before, rename it may impact users.

Signed-off-by: Zhen Lei <thunder.leizhen@...wei.com>
---
 drivers/block/zram/zram_drv.c | 4 ++--
 drivers/block/zram/zram_drv.h | 1 -
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c
index ebb234f36909..e2fbf7a847e7 100644
--- a/drivers/block/zram/zram_drv.c
+++ b/drivers/block/zram/zram_drv.c
@@ -1551,7 +1551,7 @@ static void __zram_make_request(struct zram *zram, struct bio *bio)
 
 	index = bio->bi_iter.bi_sector >> SECTORS_PER_PAGE_SHIFT;
 	offset = (bio->bi_iter.bi_sector &
-		  (SECTORS_PER_PAGE - 1)) << SECTOR_SHIFT;
+		  (PAGE_SECTORS - 1)) << SECTOR_SHIFT;
 
 	switch (bio_op(bio)) {
 	case REQ_OP_DISCARD:
@@ -1645,7 +1645,7 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector,
 	}
 
 	index = sector >> SECTORS_PER_PAGE_SHIFT;
-	offset = (sector & (SECTORS_PER_PAGE - 1)) << SECTOR_SHIFT;
+	offset = (sector & (PAGE_SECTORS - 1)) << SECTOR_SHIFT;
 
 	bv.bv_page = page;
 	bv.bv_len = PAGE_SIZE;
diff --git a/drivers/block/zram/zram_drv.h b/drivers/block/zram/zram_drv.h
index f2fd46daa760..10fdf413dd6e 100644
--- a/drivers/block/zram/zram_drv.h
+++ b/drivers/block/zram/zram_drv.h
@@ -22,7 +22,6 @@
 #include "zcomp.h"
 
 #define SECTORS_PER_PAGE_SHIFT	(PAGE_SHIFT - SECTOR_SHIFT)
-#define SECTORS_PER_PAGE	(1 << SECTORS_PER_PAGE_SHIFT)
 #define ZRAM_LOGICAL_BLOCK_SHIFT 12
 #define ZRAM_LOGICAL_BLOCK_SIZE	(1 << ZRAM_LOGICAL_BLOCK_SHIFT)
 #define ZRAM_SECTOR_PER_LOGICAL_BLOCK	\
-- 
2.26.0.106.g9fadedd