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Commit 427bfe07 authored by Tim Gardner's avatar Tim Gardner Committed by Konrad Rzeszutek Wilk
Browse files

xen-blkfront: Silence pfn maybe-uninitialized warning 



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 <konrad.wilk@oracle.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Signed-off-by: default avatarTim Gardner <tim.gardner@canonical.com>
Signed-off-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: default avatarRoger Pau Monné <roger.pau@citrix.com>
parent f7cb20f0

drivers/block/xen-blkfront.c

+1 −1
Original line number Diff line number Diff line
@@ -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);