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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-07-18 19:25:32 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-07-31 05:09:34 +0300 |
| commit | d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411 (patch) | |
| tree | 153c7ef6cc03750e6fc0d70afd782bf3ddbc4aa7 /net/rds/ib_send.c | |
| parent | 7bb1fafc2f163ad03a2007295bb2f57cfdbfb630 (diff) | |
| download | linux-d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411.tar.xz | |
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 'net/rds/ib_send.c')
| -rw-r--r-- | net/rds/ib_send.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/rds/ib_send.c b/net/rds/ib_send.c index 8557a1cae041..8ac80c1b051e 100644 --- a/net/rds/ib_send.c +++ b/net/rds/ib_send.c @@ -492,7 +492,7 @@ int rds_ib_xmit(struct rds_connection *conn, struct rds_message *rm, struct rds_ib_send_work *send = NULL; struct rds_ib_send_work *first; struct rds_ib_send_work *prev; - struct ib_send_wr *failed_wr; + const struct ib_send_wr *failed_wr; struct scatterlist *scat; u32 pos; u32 i; @@ -758,7 +758,7 @@ int rds_ib_xmit_atomic(struct rds_connection *conn, struct rm_atomic_op *op) { struct rds_ib_connection *ic = conn->c_transport_data; struct rds_ib_send_work *send = NULL; - struct ib_send_wr *failed_wr; + const struct ib_send_wr *failed_wr; struct rds_ib_device *rds_ibdev; u32 pos; u32 work_alloc; @@ -849,7 +849,7 @@ int rds_ib_xmit_rdma(struct rds_connection *conn, struct rm_rdma_op *op) struct rds_ib_send_work *send = NULL; struct rds_ib_send_work *first; struct rds_ib_send_work *prev; - struct ib_send_wr *failed_wr; + const struct ib_send_wr *failed_wr; struct scatterlist *scat; unsigned long len; u64 remote_addr = op->op_remote_addr; |