From 67fc050f0cf763403188f19bd428e4bfbebcea16 Mon Sep 17 00:00:00 2001
From: Maxime Henrion <mux@FreeBSD.org>
Date: Wed, 2 Jun 2004 22:59:57 +0000
Subject: [PATCH] Abstract the locking in fxp(4) a bit more by using macros for
 mtx_assert() and mtx_owned(), as it is done in other places, for instance
 proc locking.

---
 sys/dev/fxp/if_fxp.c    | 13 +++++++------
 sys/dev/fxp/if_fxpvar.h |  6 ++++--
 2 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/sys/dev/fxp/if_fxp.c b/sys/dev/fxp/if_fxp.c
index fd87125c086c..9d6c8ea70b8a 100644
--- a/sys/dev/fxp/if_fxp.c
+++ b/sys/dev/fxp/if_fxp.c
@@ -863,7 +863,7 @@ fxp_release(struct fxp_softc *sc)
 	struct fxp_tx *txp;
 	int i;
 
-	mtx_assert(&sc->sc_mtx, MA_NOTOWNED);
+	FXP_LOCK_ASSERT(sc, MA_NOTOWNED);
 	KASSERT(sc->ih == NULL,
 	    ("fxp_release() called with intr handle still active"));
 	if (sc->miibus)
@@ -1295,7 +1295,7 @@ fxp_start_body(struct ifnet *ifp)
 	struct mbuf *mb_head;
 	int error;
 
-	mtx_assert(&sc->sc_mtx, MA_OWNED);
+	FXP_LOCK_ASSERT(sc, MA_OWNED);
 	/*
 	 * See if we need to suspend xmit until the multicast filter
 	 * has been reprogrammed (which can only be done at the head
@@ -1634,7 +1634,7 @@ fxp_intr_body(struct fxp_softc *sc, struct ifnet *ifp, u_int8_t statack,
 	struct fxp_rfa *rfa;
 	int rnr = (statack & FXP_SCB_STATACK_RNR) ? 1 : 0;
 
-	mtx_assert(&sc->sc_mtx, MA_OWNED);
+	FXP_LOCK_ASSERT(sc, MA_OWNED);
 	if (rnr)
 		sc->rnr++;
 #ifdef DEVICE_POLLING
@@ -1993,7 +1993,7 @@ fxp_init_body(struct fxp_softc *sc)
 	struct fxp_cb_mcs *mcsp;
 	int i, prm, s;
 
-	mtx_assert(&sc->sc_mtx, MA_OWNED);
+	FXP_LOCK_ASSERT(sc, MA_OWNED);
 	s = splimp();
 	/*
 	 * Cancel any pending I/O
@@ -2434,7 +2434,7 @@ fxp_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 	 * Detaching causes us to call ioctl with the mutex owned.  Preclude
 	 * that by saying we're busy if the lock is already held.
 	 */
-	if (mtx_owned(&sc->sc_mtx))
+	if (FXP_LOCKED(sc))
 		return (EBUSY);
 
 	FXP_LOCK(sc);
@@ -2517,7 +2517,7 @@ fxp_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
 		FXP_UNLOCK(sc);
 		error = ether_ioctl(ifp, command, data);
 	}
-	if (mtx_owned(&sc->sc_mtx))
+	if (FXP_LOCKED(sc))
 		FXP_UNLOCK(sc);
 	splx(s);
 	return (error);
@@ -2579,6 +2579,7 @@ fxp_mc_setup(struct fxp_softc *sc)
 	struct fxp_tx *txp;
 	int count;
 
+	FXP_LOCK_ASSERT(sc, MA_OWNED);
 	/*
 	 * If there are queued commands, we must wait until they are all
 	 * completed. If we are already waiting, then add a NOP command
diff --git a/sys/dev/fxp/if_fxpvar.h b/sys/dev/fxp/if_fxpvar.h
index 3471a83a4e37..8168bd308f53 100644
--- a/sys/dev/fxp/if_fxpvar.h
+++ b/sys/dev/fxp/if_fxpvar.h
@@ -104,15 +104,17 @@
 #if __FreeBSD_version < 500000
 #define	FXP_LOCK(_sc)
 #define	FXP_UNLOCK(_sc)
+#define	FXP_LOCKED(_sc)
+#define	FXP_LOCK_ASSERT(_sc, _what)
 #define	INTR_MPSAFE		0
-#define mtx_owned(a)		0
-#define mtx_assert(a, b)
 #define mtx_init(a, b, c, d)
 #define mtx_destroy(a)
 struct mtx { int dummy; };
 #else
 #define	FXP_LOCK(_sc)		mtx_lock(&(_sc)->sc_mtx)
 #define	FXP_UNLOCK(_sc)		mtx_unlock(&(_sc)->sc_mtx)
+#define	FXP_LOCKED(_sc)		mtx_owned(&(_sc)->sc_mtx)
+#define	FXP_LOCK_ASSERT(_sc, _what)	mtx_assert(&(_sc)->sc_mtx, (_what))
 #endif
 
 /*