First in a series of changes to remove the now-unused Giant compatibility

framework for non-MPSAFE network protocols:

- Remove debug_mpsafenet variable, sysctl, and tunable.
- Remove NET_NEEDS_GIANT() and associate SYSINITSs used by it to force
  debug.mpsafenet=0 if non-MPSAFE protocols are compiled into the kernel.
- Remove logic to automatically flag interrupt handlers as non-MPSAFE if
  debug.mpsafenet is set for an INTR_TYPE_NET handler.
- Remove logic to automatically flag netisr handlers as non-MPSAFE if
  debug.mpsafenet is set.
- Remove references in a few subsystems, including NFS and Cronyx drivers,
  which keyed off debug_mpsafenet to determine various aspects of their own
  locking behavior.
- Convert NET_LOCK_GIANT(), NET_UNLOCK_GIANT(), and NET_ASSERT_GIANT into
  no-op's, as their entire behavior was determined by the value in
  debug_mpsafenet.
- Alias NET_CALLOUT_MPSAFE to CALLOUT_MPSAFE.

Many remaining references to NET_.*_GIANT() and NET_CALLOUT_MPSAFE are still
present in subsystems, and will be removed in followup commits.

Reviewed by:	bz, jhb
Approved by:	re (kensmith)

6 files changed, 2 insertions, 24 deletions

diff --git a/sys/dev/ath/ath_rate/amrr/amrr.c b/sys/dev/ath/ath_rate/amrr/amrr.c
index da564a8..00ae568 100644
--- a/sys/dev/ath/ath_rate/amrr/amrr.c
+++ b/sys/dev/ath/ath_rate/amrr/amrr.c
@@ -504,7 +504,7 @@ ath_rate_attach(struct ath_softc *sc)
 	if (asc == NULL)
 		return NULL;
 	asc->arc.arc_space = sizeof(struct amrr_node);
-	callout_init(&asc->timer, debug_mpsafenet ? CALLOUT_MPSAFE : 0);
+	callout_init(&asc->timer, CALLOUT_MPSAFE);
 	ath_rate_sysctlattach(sc);
 
 	return &asc->arc;
diff --git a/sys/dev/ath/ath_rate/onoe/onoe.c b/sys/dev/ath/ath_rate/onoe/onoe.c
index 281e4f1..eb5759e 100644
--- a/sys/dev/ath/ath_rate/onoe/onoe.c
+++ b/sys/dev/ath/ath_rate/onoe/onoe.c
@@ -478,7 +478,7 @@ ath_rate_attach(struct ath_softc *sc)
 	if (osc == NULL)
 		return NULL;
 	osc->arc.arc_space = sizeof(struct onoe_node);
-	callout_init(&osc->timer, debug_mpsafenet ? CALLOUT_MPSAFE : 0);
+	callout_init(&osc->timer, CALLOUT_MPSAFE);
 	ath_rate_sysctlattach(sc);
 
 	return &osc->arc;
diff --git a/sys/dev/ce/if_ce.c b/sys/dev/ce/if_ce.c
index d06663a..8f93667 100644
--- a/sys/dev/ce/if_ce.c
+++ b/sys/dev/ce/if_ce.c
@@ -2604,13 +2604,6 @@ static int ce_modevent (module_t mod, int type, void *unused)
 #if __FreeBSD_version < 500000
 	dev = makedev (CDEV_MAJOR, 0);
 #endif
-#if __FreeBSD_version >= 501114
-	if (!debug_mpsafenet && ce_mpsafenet) {
-		printf ("WORNING! Network stack is not MPSAFE. "
-			"Turning off debug.ce.mpsafenet.\n");
-		ce_mpsafenet = 0;
-	}
-#endif
 #if __FreeBSD_version >= 502103
 	if (ce_mpsafenet)
 		ce_cdevsw.d_flags &= ~D_NEEDGIANT;
diff --git a/sys/dev/cp/if_cp.c b/sys/dev/cp/if_cp.c
index 540f7ab..dbe40bc 100644
--- a/sys/dev/cp/if_cp.c
+++ b/sys/dev/cp/if_cp.c
@@ -2265,11 +2265,6 @@ static int cp_modevent (module_t mod, int type, void *unused)
 {
 	static int load_count = 0;
 
-	if (!debug_mpsafenet && cp_mpsafenet) {
-		printf ("WORNING! Network stack is not MPSAFE. "
-			"Turning off debug.cp.mpsafenet.\n");
-		cp_mpsafenet = 0;
-	}
 	if (cp_mpsafenet)
 		cp_cdevsw.d_flags &= ~D_NEEDGIANT;
 
diff --git a/sys/dev/ctau/if_ct.c b/sys/dev/ctau/if_ct.c
index 7f0bad5..3769419 100644
--- a/sys/dev/ctau/if_ct.c
+++ b/sys/dev/ctau/if_ct.c
@@ -2206,11 +2206,6 @@ static int ct_modevent (module_t mod, int type, void *unused)
 {
 	static int load_count = 0;
 
-	if (!debug_mpsafenet && ct_mpsafenet) {
-		printf ("WORNING! Network stack is not MPSAFE. "
-			"Turning off debug.ct.mpsafenet.\n");
-		ct_mpsafenet = 0;
-	}
 	if (ct_mpsafenet)
 		ct_cdevsw.d_flags &= ~D_NEEDGIANT;
 
diff --git a/sys/dev/cx/if_cx.c b/sys/dev/cx/if_cx.c
index 2bfbf22..b75f23b 100644
--- a/sys/dev/cx/if_cx.c
+++ b/sys/dev/cx/if_cx.c
@@ -2523,11 +2523,6 @@ static int cx_modevent (module_t mod, int type, void *unused)
 {
 	static int load_count = 0;
 
-	if (!debug_mpsafenet && cx_mpsafenet) {
-		printf ("WORNING! Network stack is not MPSAFE. "
-			"Turning off debug.cx.mpsafenet.\n");
-		cx_mpsafenet = 0;
-	}
 	if (cx_mpsafenet)
 		cx_cdevsw.d_flags &= ~D_NEEDGIANT;