xprtrdma: Address sparse complaint in rpcr_to_rdmar()

With "make ARCH=x86_64 allmodconfig make C=1 CF=-D__CHECK_ENDIAN__":

linux-2.6/net/sunrpc/xprtrdma/xprt_rdma.h:273:30: warning: incorrect
  type in initializer (different base types)
linux-2.6/net/sunrpc/xprtrdma/xprt_rdma.h:273:30: expected restricted
  __be32 [usertype] *buffer
linux-2.6/net/sunrpc/xprtrdma/xprt_rdma.h:273:30:    got unsigned int
  [usertype] *rq_buffer

As far as I can tell this is a false positive.

Reported-by: kbuild-all@01.org
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

1 files changed, 4 insertions, 3 deletions

diff --git a/net/sunrpc/xprtrdma/xprt_rdma.h b/net/sunrpc/xprtrdma/xprt_rdma.h
index c9d2a02f631b..d1b70397c60f 100644
--- a/net/sunrpc/xprtrdma/xprt_rdma.h
+++ b/net/sunrpc/xprtrdma/xprt_rdma.h
@@ -270,9 +270,10 @@ struct rpcrdma_req {
 static inline struct rpcrdma_req *
 rpcr_to_rdmar(struct rpc_rqst *rqst)
 {
-        struct rpcrdma_regbuf *rb = container_of(rqst->rq_buffer,
-                                                 struct rpcrdma_regbuf,
-                                                 rg_base[0]);
+        void *buffer = rqst->rq_buffer;
+        struct rpcrdma_regbuf *rb;
+
+        rb = container_of(buffer, struct rpcrdma_regbuf, rg_base);
         return rb->rg_owner;
 }