From 0829661863fb5c8031c1c5c119693ea157517783 Mon Sep 17 00:00:00 2001
From: Alex Elder <elder@inktank.com>
Date: Wed, 14 Nov 2012 12:25:18 -0600
Subject: [PATCH] rbd: pull in ceph_calc_raw_layout()

This is the first in a series of patches aimed at eliminating
the use of ceph_calc_raw_layout() by rbd.

It simply pulls in a copy of that function and renames it
rbd_calc_raw_layout().

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