From 427bfe07e6744c058ce6fc4aa187cda96b635539 Mon Sep 17 00:00:00 2001 From: Tim Gardner Date: Thu, 14 Nov 2013 14:29:52 -0700 Subject: [PATCH] xen-blkfront: Silence pfn maybe-uninitialized warning MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit pfn cannot actually be used unless (!info->feature_persistent), nor is pfn accessed in get_grant() unless (!info->feature_persistent), but silence this warning anyway. gcc-4.8 drivers/block/xen-blkfront.c: In function 'do_blkif_request': drivers/block/xen-blkfront.c:508:20: warning: 'pfn' may be used uninitialized in this function [-Wmaybe-uninitialized] gnt_list_entry = get_grant(&gref_head, pfn, info); ^ drivers/block/xen-blkfront.c:492:19: note: 'pfn' was declared here unsigned long pfn; Cc: Konrad Rzeszutek Wilk Cc: Boris Ostrovsky Cc: David Vrabel Signed-off-by: Tim Gardner Signed-off-by: Konrad Rzeszutek Wilk Acked-by: Roger Pau Monné --- drivers/block/xen-blkfront.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 432db1b59b00..5f926de61950 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -489,7 +489,7 @@ static int blkif_queue_request(struct request *req) if ((ring_req->operation == BLKIF_OP_INDIRECT) && (i % SEGS_PER_INDIRECT_FRAME == 0)) { - unsigned long pfn; + unsigned long uninitialized_var(pfn); if (segments) kunmap_atomic(segments);