export blk_recount_segments

On Monday February 12, marcm@liquid-nexus.net wrote:
> > 
> > Thanks for the quick response Neil unfortunately the kernel doesn't build with
> > this patch due to a missing symbol:
> > 
> > WARNING: "blk_recount_segments" [drivers/md/raid456.ko] undefined!
> > 
> > Is that in another file that needs patching or within raid5.c?

Yes.  I keep forgetting about that bit. Sorry.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

block/ll_rw_blk.c

@@ -1264,7 +1264,7 @@ void blk_recount_segments(request_queue_t *q, struct bio *bio)
 	bio->bi_hw_segments = nr_hw_segs;
 	bio->bi_flags |= (1 << BIO_SEG_VALID);
 }
-
+EXPORT_SYMBOL(blk_recount_segments);
 
 static int blk_phys_contig_segment(request_queue_t *q, struct bio *bio,
 				   struct bio *nxt)