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Commit 42632896 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
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RDMA/cxgb3: Remove modulo math from build_rdma_recv() 



Remove modulo usage to avoid a divide in the fast path (not all
gcc versions do strength reduction here).

Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 42fb61f0

drivers/infiniband/hw/cxgb3/iwch_qp.c

+2 −2
Original line number Diff line number Diff line
@@ -263,8 +263,8 @@ static int build_rdma_recv(struct iwch_qp *qhp, union t3_wr *wqe, 
		wqe->recv.sgl[i].len = cpu_to_be32(wr->sg_list[i].length);



		/* to in the WQE == the offset into the page */

		wqe->recv.sgl[i].to = cpu_to_be64(((u32) wr->sg_list[i].addr) %

				(1UL << (12 + page_size[i])));

		wqe->recv.sgl[i].to = cpu_to_be64(((u32)wr->sg_list[i].addr) &

				((1UL << (12 + page_size[i])) - 1));



		/* pbl_addr is the adapters address in the PBL */

		wqe->recv.pbl_addr[i] = cpu_to_be32(pbl_addr[i]);