The kernel would like to have all stack VLA usage removed[1]. Here the array is declared using a variable that is declared using a constant statement but the compiler still emits a warning. We can clear the warning bu using the constant statement directly. In place of later usage of the size variable we can use the ARRAY_SIZE() macro.
Use constant statement to declare array. [1]: https://lkml.org/lkml/2018/3/7/621 Signed-off-by: Tobin C. Harding <m...@tobin.cc> --- drivers/block/rbd.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 0016170cde0a..927ecd9a2511 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -3100,20 +3100,19 @@ static int __rbd_notify_op_lock(struct rbd_device *rbd_dev, { struct ceph_osd_client *osdc = &rbd_dev->rbd_client->client->osdc; struct rbd_client_id cid = rbd_get_cid(rbd_dev); - int buf_size = 4 + 8 + 8 + CEPH_ENCODING_START_BLK_LEN; - char buf[buf_size]; + char buf[4 + 8 + 8 + CEPH_ENCODING_START_BLK_LEN]; void *p = buf; dout("%s rbd_dev %p notify_op %d\n", __func__, rbd_dev, notify_op); /* encode *LockPayload NotifyMessage (op + ClientId) */ - ceph_start_encoding(&p, 2, 1, buf_size - CEPH_ENCODING_START_BLK_LEN); + ceph_start_encoding(&p, 2, 1, ARRAY_SIZE(buf) - CEPH_ENCODING_START_BLK_LEN); ceph_encode_32(&p, notify_op); ceph_encode_64(&p, cid.gid); ceph_encode_64(&p, cid.handle); return ceph_osdc_notify(osdc, &rbd_dev->header_oid, - &rbd_dev->header_oloc, buf, buf_size, + &rbd_dev->header_oloc, buf, ARRAY_SIZE(buf), RBD_NOTIFY_TIMEOUT, preply_pages, preply_len); } -- 2.7.4
