Revert "fs: remove dio_end_io()"

This reverts commit b75b7ca7c27dfd61dba368f390b7d4dc20b3a8cb.

The patch restores a helper that was not necessary after direct IO port
to iomap infrastructure, which gets reverted.

Signed-off-by: David Sterba <dsterba@suse.com>
2 files changed