IB/ucm: Fix compiling ucm.c

Even though this interface is marked CONFIG_BROKEN we still expect it to
compile, at least until we delete it completely.

Also mark INFINIBAND_USER_ACCESS_UCM with COMPILE_TEST so these situations
can be detected.

Fixes: e7ff98ae ("RDMA/cma: Constify path record, ib_cm_event, listen_id pointers")
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/Kconfig

@@ -37,7 +37,7 @@ config INFINIBAND_USER_ACCESS
 
 config INFINIBAND_USER_ACCESS_UCM
 	bool "Userspace CM (UCM, DEPRECATED)"
-	depends on BROKEN
+	depends on BROKEN || COMPILE_TEST
 	depends on INFINIBAND_USER_ACCESS
 	help
 	  The UCM module has known security flaws, which no one is

drivers/infiniband/core/ucm.c

@@ -207,7 +207,7 @@ static struct ib_ucm_context *ib_ucm_ctx_alloc(struct ib_ucm_file *file)
 }
 
 static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
-				 struct ib_cm_req_event_param *kreq)
+				 const struct ib_cm_req_event_param *kreq)
 {
 	ureq->remote_ca_guid             = kreq->remote_ca_guid;
 	ureq->remote_qkey                = kreq->remote_qkey;
@@ -231,7 +231,7 @@ static void ib_ucm_event_req_get(struct ib_ucm_req_event_resp *ureq,
 }
 
 static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
-				 struct ib_cm_rep_event_param *krep)
+				 const struct ib_cm_rep_event_param *krep)
 {
 	urep->remote_ca_guid      = krep->remote_ca_guid;
 	urep->remote_qkey         = krep->remote_qkey;
@@ -247,14 +247,14 @@ static void ib_ucm_event_rep_get(struct ib_ucm_rep_event_resp *urep,
 }
 
 static void ib_ucm_event_sidr_rep_get(struct ib_ucm_sidr_rep_event_resp *urep,
-				      struct ib_cm_sidr_rep_event_param *krep)
+				      const struct ib_cm_sidr_rep_event_param *krep)
 {
 	urep->status = krep->status;
 	urep->qkey   = krep->qkey;
 	urep->qpn    = krep->qpn;
 };
 
-static int ib_ucm_event_process(struct ib_cm_event *evt,
+static int ib_ucm_event_process(const struct ib_cm_event *evt,
 				struct ib_ucm_event *uvt)
 {
 	void *info = NULL;
@@ -351,7 +351,7 @@ static int ib_ucm_event_process(struct ib_cm_event *evt,
 }
 
 static int ib_ucm_event_handler(struct ib_cm_id *cm_id,
-				struct ib_cm_event *event)
+				const struct ib_cm_event *event)
 {
 	struct ib_ucm_event *uevent;
 	struct ib_ucm_context *ctx;