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author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-07-18 18:25:32 +0200 |
---|---|---|
committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-07-31 04:09:34 +0200 |
commit | d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411 (patch) | |
tree | 153c7ef6cc03750e6fc0d70afd782bf3ddbc4aa7 /drivers/infiniband/sw/rxe | |
parent | IB/mlx5, ib_post_send(), IB_WR_REG_SIG_MR: Do not modify the 'wr' argument (diff) | |
download | linux-d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411.tar.xz linux-d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411.zip |
RDMA, core and ULPs: Declare ib_post_send() and ib_post_recv() arguments const
Since neither ib_post_send() nor ib_post_recv() modify the data structure
their second argument points at, declare that argument const. This change
makes it necessary to declare the 'bad_wr' argument const too and also to
modify all ULPs that call ib_post_send(), ib_post_recv() or
ib_post_srq_recv(). This patch does not change any functionality but makes
it possible for the compiler to verify whether the
ib_post_(send|recv|srq_recv) really do not modify the posted work request.
To make this possible, only one cast had to be introduce that casts away
constness, namely in rpcrdma_post_recvs(). The only way I can think of to
avoid that cast is to introduce an additional loop in that function or to
change the data type of bad_wr from struct ib_recv_wr ** into int
(an index that refers to an element in the work request list). However,
both approaches would require even more extensive changes than this
patch.
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/sw/rxe')
-rw-r--r-- | drivers/infiniband/sw/rxe/rxe_verbs.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c index 0ea394554c8e..f5b1e0ad6142 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -287,7 +287,7 @@ static int rxe_destroy_ah(struct ib_ah *ibah) return 0; } -static int post_one_recv(struct rxe_rq *rq, struct ib_recv_wr *ibwr) +static int post_one_recv(struct rxe_rq *rq, const struct ib_recv_wr *ibwr) { int err; int i; @@ -438,8 +438,8 @@ static int rxe_destroy_srq(struct ib_srq *ibsrq) return 0; } -static int rxe_post_srq_recv(struct ib_srq *ibsrq, struct ib_recv_wr *wr, - struct ib_recv_wr **bad_wr) +static int rxe_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) { int err = 0; unsigned long flags; @@ -726,8 +726,8 @@ err1: return err; } -static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr, - struct ib_send_wr **bad_wr) +static int rxe_post_send_kernel(struct rxe_qp *qp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) { int err = 0; unsigned int mask; @@ -769,8 +769,8 @@ static int rxe_post_send_kernel(struct rxe_qp *qp, struct ib_send_wr *wr, return err; } -static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, - struct ib_send_wr **bad_wr) +static int rxe_post_send(struct ib_qp *ibqp, const struct ib_send_wr *wr, + const struct ib_send_wr **bad_wr) { struct rxe_qp *qp = to_rqp(ibqp); @@ -792,8 +792,8 @@ static int rxe_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, return rxe_post_send_kernel(qp, wr, bad_wr); } -static int rxe_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, - struct ib_recv_wr **bad_wr) +static int rxe_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *wr, + const struct ib_recv_wr **bad_wr) { int err = 0; struct rxe_qp *qp = to_rqp(ibqp); |