tree 891919065990fecf3561452c6bce944170278eb7
parent 4e728cf8ffa2891913dd48e179c132fb9fa07e0e
author Al Viro <viro@zeniv.linux.org.uk> 1451756727 -0500
committer Al Viro <viro@zeniv.linux.org.uk> 1451921347 -0500

dm-bufio: virt_to_phys() doesn't change remainder modulo PAGE_SIZE

... so virt_to_phys(p) & (PAGE_SIZE - 1) is a very odd way to
spell offset_in_page(p).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>