On 32 bit hosts, size_t is too small for align as the bitmask ~(align - 1) will zero out the higher 32 bits of the offset.
While at it, change the local overlap_bytes variable to unsigned to match the field in BdrvTrackedRequest. Signed-off-by: Kevin Wolf <kw...@redhat.com> Reviewed-by: Laszlo Ersek <ler...@redhat.com> --- block.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/block.c b/block.c index b0c5025..636aa11 100644 --- a/block.c +++ b/block.c @@ -2240,11 +2240,11 @@ static void tracked_request_begin(BdrvTrackedRequest *req, QLIST_INSERT_HEAD(&bs->tracked_requests, req, list); } -static void mark_request_serialising(BdrvTrackedRequest *req, size_t align) +static void mark_request_serialising(BdrvTrackedRequest *req, uint64_t align) { int64_t overlap_offset = req->offset & ~(align - 1); - int overlap_bytes = ROUND_UP(req->offset + req->bytes, align) - - overlap_offset; + unsigned int overlap_bytes = ROUND_UP(req->offset + req->bytes, align) + - overlap_offset; if (!req->serialising) { req->bs->serialising_in_flight++; -- 1.8.1.4