[md PATCH 21/24] md/bitmap: make sure reshape request are reflected in superblock.

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As a reshape may change the sync_size and/or chunk_size, we need
to update these whenever we write out the bitmap superblock.

Signed-off-by: NeilBrown <neilb@xxxxxxx>

 drivers/md/bitmap.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index dc5ec72..d1004b6 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -418,6 +418,9 @@ void bitmap_update_sb(struct bitmap *bitmap)
 	/* Just in case these have been changed via sysfs: */
 	sb->daemon_sleep = cpu_to_le32(bitmap->mddev->bitmap_info.daemon_sleep/HZ);
 	sb->write_behind = cpu_to_le32(bitmap->mddev->bitmap_info.max_write_behind);
+	/* This might have been changed by a reshape */
+	sb->sync_size = cpu_to_le64(bitmap->mddev->resync_max_sectors);
+	sb->chunksize = cpu_to_le32(bitmap->mddev->bitmap_info.chunksize);
 	write_page(bitmap, bitmap->storage.sb_page, 1);

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