linux-kernel - [PATCH] dm-writecache: remove unused member page_offset in writeback

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Message-Id: <20190420162017.6052-1-yehs2007@zoho.com>
Date:   Sun, 21 Apr 2019 00:20:17 +0800
From:   Huaisheng Ye <yehs2007@...o.com>
To:     mpatocka@...hat.com, snitzer@...hat.com, agk@...hat.com
Cc:     prarit@...hat.com, chengnt@...ovo.com, dm-devel@...hat.com,
        linux-kernel@...r.kernel.org, Huaisheng Ye <yehs1@...ovo.com>
Subject: [PATCH] dm-writecache: remove unused member page_offset in writeback_struct

From: Huaisheng Ye <yehs1@...ovo.com>

The structure member page_offset in writeback_struct never has been
used actually. Remove it.

Signed-off-by: Huaisheng Ye <yehs1@...ovo.com>
---
 drivers/md/dm-writecache.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index cfbbfbc..ddf1732 100644
--- a/drivers/md/dm-writecache.c
+++ b/drivers/md/dm-writecache.c
@@ -190,7 +190,6 @@ struct writeback_struct {
 	struct dm_writecache *wc;
 	struct wc_entry **wc_list;
 	unsigned wc_list_n;
-	unsigned page_offset;
 	struct page *page;
 	struct wc_entry *wc_list_inline[WB_LIST_INLINE];
 	struct bio bio;
@@ -1481,7 +1480,6 @@ static void __writecache_writeback_pmem(struct dm_writecache *wc, struct writeba
 		bio->bi_end_io = writecache_writeback_endio;
 		bio_set_dev(bio, wc->dev->bdev);
 		bio->bi_iter.bi_sector = read_original_sector(wc, e);
-		wb->page_offset = PAGE_SIZE;
 		if (max_pages <= WB_LIST_INLINE ||
 		    unlikely(!(wb->wc_list = kmalloc_array(max_pages, sizeof(struct wc_entry *),
 							   GFP_NOIO | __GFP_NORETRY |
-- 
1.8.3.1