[PATCH rdma-core 1/3] verbs: Fix gcc warnings when building for 32bit systems

[Jianxin Xiong]

Commit 6b0a3238289f ("verbs: Support dma-buf based memory region") caused
a build failure when building for 32b systems with gcc:

$ mkdir build && cd build && CFLAGS="-m32" cmake -GNinja .. \
  -DIOCTL_MODE=both -DNO_PYVERBS=1 -DENABLE_WERROR=1 && ninja
...
../libibverbs/cmd_mr.c: In function 'ibv_cmd_reg_dmabuf_mr':
../libibverbs/cmd_mr.c:152:21: error: cast to pointer from integer of
different size [-Werror=int-to-pointer-cast]
  vmr->ibv_mr.addr = (void *)offset;
...
../libibverbs/verbs.c: In function 'ibv_reg_dmabuf_mr':
../libibverbs/verbs.c:387:13: error: cast to pointer from integer of
different size [-Werror=int-to-pointer-cast]
  mr->addr = (void *)offset;
...

Reported-by: Ali Alnubani <alialnu at nvidia.com>
Signed-off-by: Jianxin Xiong <jianxin.xiong at intel.com>
---
 libibverbs/cmd_mr.c | 2 +-
 libibverbs/verbs.c  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/libibverbs/cmd_mr.c b/libibverbs/cmd_mr.c
index af0fad7..736fce0 100644
--- a/libibverbs/cmd_mr.c
+++ b/libibverbs/cmd_mr.c
@@ -149,7 +149,7 @@ int ibv_cmd_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset, size_t length,
 	vmr->ibv_mr.lkey = lkey;
 	vmr->ibv_mr.rkey = rkey;
 	vmr->ibv_mr.pd = pd;
-	vmr->ibv_mr.addr = (void *)offset;
+	vmr->ibv_mr.addr = (void *)(uintptr_t)offset;
 	vmr->ibv_mr.length = length;
 	vmr->mr_type = IBV_MR_TYPE_DMABUF_MR;
 	return 0;
diff --git a/libibverbs/verbs.c b/libibverbs/verbs.c
index b93046a..f666695 100644
--- a/libibverbs/verbs.c
+++ b/libibverbs/verbs.c
@@ -384,7 +384,7 @@ struct ibv_mr *ibv_reg_dmabuf_mr(struct ibv_pd *pd, uint64_t offset,
 
 	mr->context = pd->context;
 	mr->pd = pd;
-	mr->addr = (void *)offset;
+	mr->addr = (void *)(uintptr_t)offset;
 	mr->length = length;
 	return mr;
 }
-- 
1.8.3.1