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xprtrdma: Remove rpcrdma_sendctx::sc_device

Browse source 
Micro-optimization: Save eight bytes in a frequently allocated
structure.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Chuck Lever 2019-10-17 14:31:27 -04:00 committed by Anna Schumaker
parent f995879ec4
commit b5cde6aa88
2 changed files with 2 additions and 3 deletions
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4
net/sunrpc/xprtrdma/rpc_rdma.c
View file

@ -564,6 +564,7 @@ static void rpcrdma_sendctx_done(struct kref *kref)
*/
void rpcrdma_sendctx_unmap(struct rpcrdma_sendctx *sc)
{
struct rpcrdma_regbuf *rb = sc->sc_req->rl_sendbuf;
struct ib_sge *sge;
if (!sc->sc_unmap_count)
@ -575,7 +576,7 @@ void rpcrdma_sendctx_unmap(struct rpcrdma_sendctx *sc)
*/
for (sge = &sc->sc_sges[2]; sc->sc_unmap_count;
++sge, --sc->sc_unmap_count)
ib_dma_unmap_page(sc->sc_device, sge->addr, sge->length,
ib_dma_unmap_page(rdmab_device(rb), sge->addr, sge->length,
DMA_TO_DEVICE);
kref_put(&sc->sc_req->rl_kref, rpcrdma_sendctx_done);
@ -625,7 +626,6 @@ static bool rpcrdma_prepare_msg_sges(struct rpcrdma_xprt *r_xprt,
*/
if (!rpcrdma_regbuf_dma_map(r_xprt, rb))
goto out_regbuf;
sc->sc_device = rdmab_device(rb);
sge_no = 1;
sge[sge_no].addr = rdmab_addr(rb);
sge[sge_no].length = xdr->head[0].iov_len;

1
net/sunrpc/xprtrdma/xprt_rdma.h
View file

@ -221,7 +221,6 @@ struct rpcrdma_req;
struct rpcrdma_sendctx {
struct ib_send_wr sc_wr;
struct ib_cqe sc_cqe;
struct ib_device *sc_device;
struct rpcrdma_req *sc_req;
unsigned int sc_unmap_count;
struct ib_sge sc_sges[];