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authorSteve Wise <swise@opengridcomputing.com>2009-02-16 21:23:32 -0800
committerRoland Dreier <rolandd@cisco.com>2009-02-16 21:23:32 -0800
commit426328963078f644c7194403a308588cf684d4c6 (patch)
tree4f4d22db8b998b0275800c69075cf1471bdc7b9c /drivers
parent42fb61f02f9bdc476c7a76d3cce0400d989f44c5 (diff)
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: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/infiniband/hw/cxgb3/iwch_qp.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/infiniband/hw/cxgb3/iwch_qp.c b/drivers/infiniband/hw/cxgb3/iwch_qp.c
index c84ac5bfb10..0e18f6fc23e 100644
--- a/drivers/infiniband/hw/cxgb3/iwch_qp.c
+++ b/drivers/infiniband/hw/cxgb3/iwch_qp.c
@@ -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]);