[src/trunk]: src/sys/arch/xen/xen save some memory - no need to embed sc insi...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/b49681689e9c
branches:  trunk
changeset: 970904:b49681689e9c
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Mon Apr 06 10:05:38 2020 +0000

description:
save some memory - no need to embed sc inside struct xennet_rxreq

diffstat:

 sys/arch/xen/xen/if_xennet_xenbus.c |  19 +++++++------------
 1 files changed, 7 insertions(+), 12 deletions(-)

diffs (90 lines):

diff -r de6c14a1ac05 -r b49681689e9c sys/arch/xen/xen/if_xennet_xenbus.c
--- a/sys/arch/xen/xen/if_xennet_xenbus.c       Mon Apr 06 09:54:24 2020 +0000
+++ b/sys/arch/xen/xen/if_xennet_xenbus.c       Mon Apr 06 10:05:38 2020 +0000
@@ -1,4 +1,4 @@
-/*      $NetBSD: if_xennet_xenbus.c,v 1.100 2020/04/06 08:26:32 jdolecek Exp $      */
+/*      $NetBSD: if_xennet_xenbus.c,v 1.101 2020/04/06 10:05:38 jdolecek Exp $      */
 
 /*
  * Copyright (c) 2006 Manuel Bouyer.
@@ -81,7 +81,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_xennet_xenbus.c,v 1.100 2020/04/06 08:26:32 jdolecek Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_xennet_xenbus.c,v 1.101 2020/04/06 10:05:38 jdolecek Exp $");
 
 #include "opt_xen.h"
 #include "opt_nfs_boot.h"
@@ -177,7 +177,6 @@
 /* va/pa for this receive buf. ma will be provided by backend */
        paddr_t rxreq_pa;
        vaddr_t rxreq_va;
-       struct xennet_xenbus_softc *rxreq_sc; /* pointer to our interface */
 };
 
 struct xennet_xenbus_softc {
@@ -225,7 +224,6 @@
 static void xennet_free_rx_buffer(struct xennet_xenbus_softc *);
 static void xennet_tx_complete(struct xennet_xenbus_softc *);
 static void xennet_rx_mbuf_free(struct mbuf *, void *, size_t, void *);
-static void xennet_rx_free_req(struct xennet_rxreq *);
 static int  xennet_handler(void *);
 static bool xennet_talk_to_backend(struct xennet_xenbus_softc *);
 #ifdef XENNET_DEBUG_DUMP
@@ -328,7 +326,6 @@
        for (i = 0; i < NET_RX_RING_SIZE; i++) {
                struct xennet_rxreq *rxreq = &sc->sc_rxreqs[i];
                rxreq->rxreq_id = i;
-               rxreq->rxreq_sc = sc;
                rxreq->rxreq_va = (vaddr_t)pool_cache_get_paddr(
                    if_xennetrxbuf_cache, PR_WAITOK, &rxreq->rxreq_pa);
                if (rxreq->rxreq_va == 0)
@@ -782,10 +779,8 @@
 };
 
 static void
-xennet_rx_free_req(struct xennet_rxreq *req)
+xennet_rx_free_req(struct xennet_xenbus_softc *sc, struct xennet_rxreq *req)
 {
-       struct xennet_xenbus_softc *sc = req->rxreq_sc;
-
        KASSERT(mutex_owned(&sc->sc_rx_lock));
 
        /* puts back the RX request in the list of free RX requests */
@@ -907,7 +902,7 @@
                                DPRINTFN(XEDB_EVENT,
                                    ("xennet_handler bad dest\n"));
                                /* packet not for us */
-                               xennet_rx_free_req(req);
+                               xennet_rx_free_req(sc, req);
                                continue;
                        }
                }
@@ -915,7 +910,7 @@
                if (__predict_false(m == NULL)) {
                        printf("%s: rx no mbuf\n", ifp->if_xname);
                        if_statinc(ifp, if_ierrors);
-                       xennet_rx_free_req(req);
+                       xennet_rx_free_req(sc, req);
                        continue;
                }
                MCLAIM(m, &sc->sc_ethercom.ec_rx_mowner);
@@ -935,7 +930,7 @@
                                if_statinc(ifp, if_ierrors);
                                req->rxreq_va = va;
                                req->rxreq_pa = pa;
-                               xennet_rx_free_req(req);
+                               xennet_rx_free_req(sc, req);
                                m_freem(m);
                                continue;
                        }
@@ -950,7 +945,7 @@
                else if (rx->flags & NETRXF_data_validated)
                        m->m_pkthdr.csum_flags = XN_M_CSUM_SUPPORTED;
                /* free req may overwrite *rx, better doing it late */
-               xennet_rx_free_req(req);
+               xennet_rx_free_req(sc, req);
 
                /* Pass the packet up. */
                if_percpuq_enqueue(ifp->if_percpuq, m);