Commit 9b8d8469 authored Jul 20, 2020 by Leon Romanovsky Committed by Jason Gunthorpe Jul 24, 2020

RDMA/uverbs: Silence shiftTooManyBitsSigned warning

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>

parent 29f3fe1d

drivers/infiniband/core/uverbs_cmd.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1897,7 +1897,7 @@ 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))

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