RDMA: Mark if create address handle is in a sleepable context

Introduce a 'flags' field to create address handle callback and add a flag
that marks whether the callback is executed in an atomic context or not.

This will allow drivers to wait for completion instead of polling for it
when it is allowed.

Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/ocrdma/ocrdma_ah.c

@@ -157,7 +157,7 @@ static inline int set_av_attr(struct ocrdma_dev *dev, struct ocrdma_ah *ah,
 }
 
 struct ib_ah *ocrdma_create_ah(struct ib_pd *ibpd, struct rdma_ah_attr *attr,
-			       struct ib_udata *udata)
+			       u32 flags, struct ib_udata *udata)
 {
 	u32 *ahid_addr;
 	int status;

drivers/infiniband/hw/ocrdma/ocrdma_ah.h

@@ -52,7 +52,7 @@ enum {
 };
 
 struct ib_ah *ocrdma_create_ah(struct ib_pd *pd, struct rdma_ah_attr *ah_attr,
-			       struct ib_udata *udata);
+			       u32 flags, struct ib_udata *udata);
 int ocrdma_destroy_ah(struct ib_ah *ah);
 int ocrdma_query_ah(struct ib_ah *ah, struct rdma_ah_attr *ah_attr);