RDMA/uverbs: Silence shiftTooManyBitsSigned warning

[ Upstream commit 79c85af5c944c3a7c187d9bf8495f8bf2f796cba ]

Fix reported by kbuild warning.

   drivers/infiniband/core/uverbs_cmd.c:1897:47: warning: Shifting signed 32-bit value by 31 bits is undefined behaviour [shiftTooManyBitsSigned]
    BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
                                                 ^
Link: https://lore.kernel.org/r/20200720175627.1273096-3-leon@kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Stable-dep-of: 8de8482fe573 ("RDMA/mlx5: Fix validation of max_rd_atomic caps for DC")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index d413dafb9211def0930075bbe224d9c99f93c059..39cbb853f91346366ac36a8c20f32b2e7c663219 100644 (file)
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1952,7 +1952,7 @@ static int ib_uverbs_ex_modify_qp(struct uverbs_attr_bundle *attrs)
         * Last bit is reserved for extending the attr_mask by
         * using another field.
         */
-       BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1 << 31));
+       BUILD_BUG_ON(IB_USER_LAST_QP_ATTR_MASK == (1ULL << 31));
 
        if (cmd.base.attr_mask &
            ~((IB_USER_LAST_QP_ATTR_MASK << 1) - 1))