On Wed, Jul 21, 2021 at 03:26:59PM +0900, Naohiro Aota wrote: > btrfs_bio = btrfs_io_bio(bio); > btrfs_io_bio_init(btrfs_bio); > > - bio_trim(bio, offset >> 9, size >> 9); > + bio_trim(bio, (sector_t)offset >> 9, (sector_t)size >> 9); No need for the casts when shifting down.