block: Really silence spurious compiler warnings

The uninitialized_var() macro appears to not work on structs...
Get rid of it, and manually initialize instead.

Signed-off-by: Kent Overstreet <kmo@daterainc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/block/blk-merge.c b/block/blk-merge.c
index 0b097f6..8f8adaa 100644 (file)
--- a/block/blk-merge.c
+++ b/block/blk-merge.c
@@ -86,11 +86,9 @@ EXPORT_SYMBOL(blk_recount_segments);
 static int blk_phys_contig_segment(struct request_queue *q, struct bio *bio,
                                   struct bio *nxt)
 {
-       struct bio_vec end_bv, nxt_bv;
+       struct bio_vec end_bv = { NULL }, nxt_bv;
        struct bvec_iter iter;
 
-       uninitialized_var(end_bv);
-
        if (!blk_queue_cluster(q))
                return 0;
 
@@ -170,13 +168,11 @@ new_segment:
 int blk_rq_map_sg(struct request_queue *q, struct request *rq,
                  struct scatterlist *sglist)
 {
-       struct bio_vec bvec, bvprv;
+       struct bio_vec bvec, bvprv = { NULL };
        struct req_iterator iter;
        struct scatterlist *sg;
        int nsegs, cluster;
 
-       uninitialized_var(bvprv);
-
        nsegs = 0;
        cluster = blk_queue_cluster(q);
 
@@ -234,13 +230,11 @@ EXPORT_SYMBOL(blk_rq_map_sg);
 int blk_bio_map_sg(struct request_queue *q, struct bio *bio,
                   struct scatterlist *sglist)
 {
-       struct bio_vec bvec, bvprv;
+       struct bio_vec bvec, bvprv = { NULL };
        struct scatterlist *sg;
        int nsegs, cluster;
        struct bvec_iter iter;
 
-       uninitialized_var(bvprv);
-
        nsegs = 0;
        cluster = blk_queue_cluster(q);