[PATCH 2/3] md/raid1-10: add rdev_bb_block_sectors() helper

["Li Youhong" <dayou5941@163.com>]

From: Li Youhong <liyouhong@kylinos.cn>

raid1 and raid10 narrow_write_error() use the same logic to compute the
badblocks-aligned block size. Factor it into an inline helper in
raid1-10.c. No functional change.

Signed-off-by: Li Youhong <liyouhong@kylinos.cn>
---
 drivers/md/raid1-10.c | 10 ++++++++++
 drivers/md/raid1.c    |  7 +------
 drivers/md/raid10.c   |  7 +------
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/drivers/md/raid1-10.c b/drivers/md/raid1-10.c
index 3b0e230692ba..c7ddf136771d 100644
--- a/drivers/md/raid1-10.c
+++ b/drivers/md/raid1-10.c
@@ -155,6 +155,16 @@ static inline bool raid1_add_bio_to_plug(struct mddev *mddev, struct bio *bio,
 	return true;
 }
 
+/* Block size used when narrowing a write error down to badblocks granularity. */
+static inline int rdev_bb_block_sectors(struct md_rdev *rdev)
+{
+	int lbs = bdev_logical_block_size(rdev->bdev) >> 9;
+
+	if (rdev->badblocks.shift < 0)
+		return lbs;
+	return roundup(1 << rdev->badblocks.shift, lbs);
+}
+
 /*
  * current->bio_list will be set under submit_bio() context, in this case bitmap
  * io will be added to the list and wait for current io submission to finish,
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index 9d8441348f14..8a40c69d70a3 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -2465,16 +2465,11 @@ static void narrow_write_error(struct r1bio *r1_bio, int i)
 	 * We currently own a reference on the rdev.
 	 */
 
-	int block_sectors, lbs = bdev_logical_block_size(rdev->bdev) >> 9;
+	int block_sectors = rdev_bb_block_sectors(rdev);
 	sector_t sector;
 	int sectors;
 	int sect_to_write = r1_bio->sectors;
 
-	if (rdev->badblocks.shift < 0)
-		block_sectors = lbs;
-	else
-		block_sectors = roundup(1 << rdev->badblocks.shift, lbs);
-
 	sector = r1_bio->sector;
 	sectors = ((sector + block_sectors)
 		   & ~(sector_t)(block_sectors - 1))
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index c4218d6483ed..5b1dbb0b7f5a 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2762,16 +2762,11 @@ static void narrow_write_error(struct r10bio *r10_bio, int i)
 	 * We currently own a reference to the rdev.
 	 */
 
-	int block_sectors, lbs = bdev_logical_block_size(rdev->bdev) >> 9;
+	int block_sectors = rdev_bb_block_sectors(rdev);
 	sector_t sector;
 	int sectors;
 	int sect_to_write = r10_bio->sectors;
 
-	if (rdev->badblocks.shift < 0)
-		block_sectors = lbs;
-	else
-		block_sectors = roundup(1 << rdev->badblocks.shift, lbs);
-
 	sector = r10_bio->sector;
 	sectors = ((r10_bio->sector + block_sectors)
 		   & ~(sector_t)(block_sectors - 1))
-- 
2.25.1