[PATCH v3 1/4] drbd: use PAGE_SECTORS_SHIFT and PAGE_SECTORS

[Luis Chamberlain <mcgrof@kernel.org>]

Replace common constants with generic versions.
This produces no functional changes.

Acked-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 drivers/block/drbd/drbd_bitmap.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/block/drbd/drbd_bitmap.c b/drivers/block/drbd/drbd_bitmap.c
index 85ca000a0564..1a1782f55e61 100644
--- a/drivers/block/drbd/drbd_bitmap.c
+++ b/drivers/block/drbd/drbd_bitmap.c
@@ -1000,7 +1000,7 @@ static void bm_page_io_async(struct drbd_bm_aio_ctx *ctx, int page_nr) __must_ho
 	unsigned int len;
 
 	first_bm_sect = device->ldev->md.md_offset + device->ldev->md.bm_offset;
-	on_disk_sector = first_bm_sect + (((sector_t)page_nr) << (PAGE_SHIFT-SECTOR_SHIFT));
+	on_disk_sector = first_bm_sect + (((sector_t)page_nr) << PAGE_SECTORS_SHIFT);
 
 	/* this might happen with very small
 	 * flexible external meta data device,
@@ -1008,7 +1008,7 @@ static void bm_page_io_async(struct drbd_bm_aio_ctx *ctx, int page_nr) __must_ho
 	last_bm_sect = drbd_md_last_bitmap_sector(device->ldev);
 	if (first_bm_sect <= on_disk_sector && last_bm_sect >= on_disk_sector) {
 		sector_t len_sect = last_bm_sect - on_disk_sector + 1;
-		if (len_sect < PAGE_SIZE/SECTOR_SIZE)
+		if (len_sect < PAGE_SECTORS)
 			len = (unsigned int)len_sect*SECTOR_SIZE;
 		else
 			len = PAGE_SIZE;
-- 
2.39.2