[PATCH] rbd: cast snap_count to size_t to avoid tautological comparison warning

[Rosen Penev]

snap_count is u32 but the comparison is against a SIZE_MAX-derived value
(~2^61 on 64-bit), which clang flags as always false with
-Wtautological-constant-out-of-range-compare. Cast to size_t so the
comparison is done in the correct width.

Assisted-by: Opencode:Big-pickle
Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
---
 drivers/block/rbd.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index 94709466ad19..b4ba51db9a28 100644
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -6079,7 +6079,7 @@ static int rbd_dev_v2_snap_context(struct rbd_device *rbd_dev,
 	 * make sure the computed size of the snapshot context we
 	 * allocate is representable in a size_t.
 	 */
-	if (snap_count > (SIZE_MAX - sizeof (struct ceph_snap_context))
+	if ((size_t)snap_count > (SIZE_MAX - sizeof (struct ceph_snap_context))
 				 / sizeof (u64)) {
 		ret = -EINVAL;
 		goto out;
-- 
2.54.0