sync_super
rs->md.sync_super = super_sync;
void (*sync_super)(struct mddev *mddev,
.sync_super = super_90_sync,
.sync_super = super_1_sync,
if (mddev->sync_super) {
mddev->sync_super(mddev, rdev);
super_types[mddev->major_version].sync_super(mddev, rdev);
sync_super(mddev, rdev);
void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev);