The mainline 3.14 commit 'block: Astract out bvec iterator' broke the
lttng-modules tracepoints. Fix them here.
(From OE-Core rev: c11b29ff4f24af0445c3c6a694b8dc2037dcd7e4)
Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>