ceph: switch netfs read ops to use rreq->inode instead of rreq->mapping->host
[ Upstream commit a25cedb4 ] One fewer pointer dereference, and in the future we may not be able to count on the mapping pointer being populated (e.g. in the DIO case). Signed-off-by: Jeff Layton <jlayton@kernel.org> Signed-off-by: Ilya Dryomov <idryomov@gmail.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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