commit cf7b7e1492e97dd0c44479239742eb4cb752eeed
author Alex Elder <elder@inktank.com> Fri Mar 01 18:00:15 2013 -0600
committer Sage Weil <sage@inktank.com> Wed May 01 21:16:21 2013 -0700
tree 83ed8068f3b0c1138601a763657aa3a2335fd24e
parent 54ae0756e3847f4350ba24271a2a38be1263dd67

ceph: use calc_pages_for() in start_read()

There's a spot that computes the number of pages to allocate for a
page-aligned length by just shifting it.  Use calc_pages_for()
instead, to be consistent with usage everywhere else.  The result
is the same.

The reason for this is to make it clearer in an upcoming patch that
this calculation is duplicated.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>