block: unexport get_gendisk

get_gendisk is not used by any modular code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/block/genhd.c b/block/genhd.c
index 1e4855c..6323cc7 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -980,7 +980,6 @@ struct gendisk *get_gendisk(dev_t devt, int *partno)
 	}
 	return disk;
 }
-EXPORT_SYMBOL(get_gendisk);
 
 /**
  * bdget_disk - do bdget() by gendisk and partition number