dm writecache: remove unused member page_offset in writeback_struct

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

Signed-off-by: Huaisheng Ye <yehs1@lenovo.com>
Acked-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>

diff --git a/drivers/md/dm-writecache.c b/drivers/md/dm-writecache.c
index cfbbfbc..ddf1732 100644 (file)
--- 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 |