From: Matan Barak <matanb@mellanox.com>
Date: Thu, 22 Mar 2018 11:52:02 +0200
Subject: IB/uverbs: UAPI pointers should use __aligned_u64 type
Patch-mainline: v4.17-rc1
Git-commit: be23fb9a2c1d33037c1499a04e93bb0c03cf73d6
References: bsc#1103992 FATE#326009

The ioctl() UAPIs are meant to be used by both user-space
and kernel ioctl() handlers.

Mostly, these UAPI structs tend to consist of simple types, but
sometimes user-space pointers may be passed between user-space and
kernel. We would like to avoid dereferencing a user-space pointer in
the kernel, thus - we always define RDMA_UAPI_PTR as a __aligned_u64
type.

Fixes: 1f7ff9d5d36a ('IB/uverbs: Move to new headers and make naming consistent')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 include/uapi/rdma/ib_user_ioctl_verbs.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/include/uapi/rdma/ib_user_ioctl_verbs.h
+++ b/include/uapi/rdma/ib_user_ioctl_verbs.h
@@ -37,7 +37,7 @@
 #include <linux/types.h>
 
 #ifndef RDMA_UAPI_PTR
-#define RDMA_UAPI_PTR(_type, _name)	_type __attribute__((aligned(8))) _name
+#define RDMA_UAPI_PTR(_type, _name)	__aligned_u64 _name
 #endif
 
 #endif