This is a note to let you know that I've just added the patch titled
RDMA/uverbs: Silence shiftTooManyBitsSigned warning
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-uverbs-silence-shifttoomanybitssigned-warning.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 7015fff14a0ab737684dc4af1e6793aafbbf8a29
Author: Leon Romanovsky <leon@xxxxxxxxxx>
Date: Mon Jul 20 20:56:27 2020 +0300
RDMA/uverbs: Silence shiftTooManyBitsSigned warning
[ Upstream commit 9b8d846924856570625b93f83ae0624391193bce ]
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@xxxxxxxxxx
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Stable-dep-of: 8de8482fe573 ("RDMA/mlx5: Fix validation of max_rd_atomic caps for DC")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index d413dafb9211..39cbb853f913 100644
--- 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))
