Replace calls to WITNESS_SLEEP() and witness_list() with equivalent calls

to WITNESS_WARN().

24 files changed, 65 insertions, 91 deletions

diff --git a/sys/alpha/alpha/trap.c b/sys/alpha/alpha/trap.c
index 718f677..d4df234 100644
--- a/sys/alpha/alpha/trap.c
+++ b/sys/alpha/alpha/trap.c
@@ -783,12 +783,8 @@ syscall(code, framep)
 #ifdef DIAGNOSTIC
 	cred_free_thread(td);
 #endif
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);
 }
diff --git a/sys/amd64/amd64/trap.c b/sys/amd64/amd64/trap.c
index ab1f1f0..d29cc07 100644
--- a/sys/amd64/amd64/trap.c
+++ b/sys/amd64/amd64/trap.c
@@ -1094,13 +1094,8 @@ syscall(frame)
 #ifdef DIAGNOSTIC
 	cred_free_thread(td);
 #endif
-
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);
 }
diff --git a/sys/i386/i386/trap.c b/sys/i386/i386/trap.c
index ab1f1f0..d29cc07 100644
--- a/sys/i386/i386/trap.c
+++ b/sys/i386/i386/trap.c
@@ -1094,13 +1094,8 @@ syscall(frame)
 #ifdef DIAGNOSTIC
 	cred_free_thread(td);
 #endif
-
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);
 }
diff --git a/sys/ia64/ia64/trap.c b/sys/ia64/ia64/trap.c
index 9aab532..30f43f5 100644
--- a/sys/ia64/ia64/trap.c
+++ b/sys/ia64/ia64/trap.c
@@ -904,12 +904,8 @@ syscall(int code, u_int64_t *args, struct trapframe *framep)
 #ifdef DIAGNOSTIC
 	cred_free_thread(td);
 #endif
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);
 }
@@ -1081,13 +1077,8 @@ ia32_syscall(struct trapframe *framep)
 #ifdef DIAGNOSTIC
 	cred_free_thread(td);
 #endif
-
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);
 }
diff --git a/sys/kern/kern_condvar.c b/sys/kern/kern_condvar.c
index 87c2840..a95e623 100644
--- a/sys/kern/kern_condvar.c
+++ b/sys/kern/kern_condvar.c
@@ -199,7 +199,8 @@ cv_wait(struct cv *cvp, struct mtx *mp)
 		ktrcsw(1, 0);
 #endif
 	CV_ASSERT(cvp, mp, td);
-	WITNESS_SLEEP(0, &mp->mtx_object);
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
+	    "Waiting on \"%s\"", cvp->cv_description);
 	WITNESS_SAVE(&mp->mtx_object, mp);
 
 	if (cold ) {
@@ -255,7 +256,8 @@ cv_wait_sig(struct cv *cvp, struct mtx *mp)
 		ktrcsw(1, 0);
 #endif
 	CV_ASSERT(cvp, mp, td);
-	WITNESS_SLEEP(0, &mp->mtx_object);
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
+	    "Waiting on \"%s\"", cvp->cv_description);
 	WITNESS_SAVE(&mp->mtx_object, mp);
 
 	if (cold || panicstr) {
@@ -323,7 +325,8 @@ cv_timedwait(struct cv *cvp, struct mtx *mp, int timo)
 		ktrcsw(1, 0);
 #endif
 	CV_ASSERT(cvp, mp, td);
-	WITNESS_SLEEP(0, &mp->mtx_object);
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
+	    "Waiting on \"%s\"", cvp->cv_description);
 	WITNESS_SAVE(&mp->mtx_object, mp);
 
 	if (cold || panicstr) {
@@ -401,7 +404,8 @@ cv_timedwait_sig(struct cv *cvp, struct mtx *mp, int timo)
 		ktrcsw(1, 0);
 #endif
 	CV_ASSERT(cvp, mp, td);
-	WITNESS_SLEEP(0, &mp->mtx_object);
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mp->mtx_object,
+	    "Waiting on \"%s\"", cvp->cv_description);
 	WITNESS_SAVE(&mp->mtx_object, mp);
 
 	if (cold || panicstr) {
diff --git a/sys/kern/kern_lock.c b/sys/kern/kern_lock.c
index 6ee1c5c..7f8b831 100644
--- a/sys/kern/kern_lock.c
+++ b/sys/kern/kern_lock.c
@@ -240,7 +240,9 @@ debuglockmgr(lkp, flags, interlkp, td, name, file, line)
 	}
 
 	if ((flags & (LK_NOWAIT|LK_RELEASE)) == 0)
-		WITNESS_SLEEP(1, &lkp->lk_interlock->mtx_object);
+		WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK,
+		    &lkp->lk_interlock->mtx_object,
+		    "Acquiring lockmgr lock \"%s\"", lkp->lk_wmesg);
 
 	if (panicstr != NULL) {
 		mtx_unlock(lkp->lk_interlock);
diff --git a/sys/kern/kern_mac.c b/sys/kern/kern_mac.c
index e9d9eeb..e98a50c 100644
--- a/sys/kern/kern_mac.c
+++ b/sys/kern/kern_mac.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/kern/kern_sig.c b/sys/kern/kern_sig.c
index 7aa9064..712f76a 100644
--- a/sys/kern/kern_sig.c
+++ b/sys/kern/kern_sig.c
@@ -1648,7 +1648,8 @@ issignal(td)
 
 	p = td->td_proc;
 	PROC_LOCK_ASSERT(p, MA_OWNED);
-	WITNESS_SLEEP(1, &p->p_mtx.mtx_object);
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &p->p_mtx.mtx_object,
+	    "Checking for signals");
 	for (;;) {
 		int traced = (p->p_flag & P_TRACED) || (p->p_stops & S_SIG);
 
diff --git a/sys/kern/kern_synch.c b/sys/kern/kern_synch.c
index c626f7a..3c0d5fa 100644
--- a/sys/kern/kern_synch.c
+++ b/sys/kern/kern_synch.c
@@ -149,7 +149,8 @@ msleep(ident, mtx, priority, wmesg, timo)
 	if (KTRPOINT(td, KTR_CSW))
 		ktrcsw(1, 0);
 #endif
-	WITNESS_SLEEP(0, &mtx->mtx_object);
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, &mtx->mtx_object,
+	    "Sleeping on \"%s\"", wmesg);
 	KASSERT(timo != 0 || mtx_owned(&Giant) || mtx != NULL,
 	    ("sleeping without a mutex"));
 	/*
diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 05d6185..2c5191c 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -1000,7 +1000,8 @@ sysctl_old_user(struct sysctl_req *req, const void *p, size_t l)
 	size_t i = 0;
 
 	if (req->lock == 1 && req->oldptr)
-		WITNESS_SLEEP(1, NULL);
+		WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
+		    "sysctl_old_user()");
 	if (req->oldptr) {
 		i = l;
 		if (req->oldlen <= req->oldidx)
diff --git a/sys/kern/subr_mbuf.c b/sys/kern/subr_mbuf.c
index 4facff8..7906ab1 100644
--- a/sys/kern/subr_mbuf.c
+++ b/sys/kern/subr_mbuf.c
@@ -1038,15 +1038,8 @@ mb_reclaim(void)
 	struct domain *dp;
 	struct protosw *pr;
 
-/*
- * XXX: Argh, we almost always trip here with witness turned on now-a-days
- * XXX: because we often come in with Giant held. For now, there's no way
- * XXX: to avoid this.
- */
-#ifdef WITNESS
-	KASSERT(witness_list(curthread) == 0,
-	    ("mb_reclaim() called with locks held"));
-#endif
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK | WARN_PANIC, NULL,
+	    "mb_reclaim()");
 
 	mbstat.m_drain++;	/* XXX: No consistency. */
 
diff --git a/sys/kern/subr_trap.c b/sys/kern/subr_trap.c
index da4b7a8..9eb4aed 100644
--- a/sys/kern/subr_trap.c
+++ b/sys/kern/subr_trap.c
@@ -157,10 +157,7 @@ ast(struct trapframe *framep)
 	CTR3(KTR_SYSC, "ast: thread %p (pid %d, %s)", td, p->p_pid,
             p->p_comm);
 	KASSERT(TRAPF_USERMODE(framep), ("ast in kernel mode"));
-#ifdef WITNESS
-	if (witness_list(td))
-		panic("Returning to user mode with mutex(s) held");
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "Returning to user mode");
 	mtx_assert(&Giant, MA_NOTOWNED);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	td->td_frame = framep;
diff --git a/sys/powerpc/aim/trap.c b/sys/powerpc/aim/trap.c
index 4874093..83f0b86 100644
--- a/sys/powerpc/aim/trap.c
+++ b/sys/powerpc/aim/trap.c
@@ -473,12 +473,8 @@ syscall(struct trapframe *frame)
 	 */
 	STOPEVENT(p, S_SCX, code);
 
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);	
 }
diff --git a/sys/powerpc/powerpc/trap.c b/sys/powerpc/powerpc/trap.c
index 4874093..83f0b86 100644
--- a/sys/powerpc/powerpc/trap.c
+++ b/sys/powerpc/powerpc/trap.c
@@ -473,12 +473,8 @@ syscall(struct trapframe *frame)
 	 */
 	STOPEVENT(p, S_SCX, code);
 
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);	
 }
diff --git a/sys/security/mac/mac_framework.c b/sys/security/mac/mac_framework.c
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_framework.c
+++ b/sys/security/mac/mac_framework.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/security/mac/mac_internal.h b/sys/security/mac/mac_internal.h
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_internal.h
+++ b/sys/security/mac/mac_internal.h
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/security/mac/mac_net.c b/sys/security/mac/mac_net.c
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_net.c
+++ b/sys/security/mac/mac_net.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/security/mac/mac_pipe.c b/sys/security/mac/mac_pipe.c
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_pipe.c
+++ b/sys/security/mac/mac_pipe.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/security/mac/mac_process.c b/sys/security/mac/mac_process.c
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_process.c
+++ b/sys/security/mac/mac_process.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/security/mac/mac_syscalls.c b/sys/security/mac/mac_syscalls.c
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_syscalls.c
+++ b/sys/security/mac/mac_syscalls.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/security/mac/mac_system.c b/sys/security/mac/mac_system.c
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_system.c
+++ b/sys/security/mac/mac_system.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/security/mac/mac_vfs.c b/sys/security/mac/mac_vfs.c
index e9d9eeb..e98a50c 100644
--- a/sys/security/mac/mac_vfs.c
+++ b/sys/security/mac/mac_vfs.c
@@ -264,7 +264,7 @@ static int mac_policy_list_busy;
 } while (0)
 
 /*
- * We manually invoke WITNESS_SLEEP() to allow Witness to generate
+ * We manually invoke WITNESS_WARN() to allow Witness to generate
  * warnings even if we don't end up ever triggering the wait at
  * run-time.  The consumer of the exclusive interface must not hold
  * any locks (other than potentially Giant) since we may sleep for
@@ -273,7 +273,8 @@ static int mac_policy_list_busy;
  * be made.
  */
 #define	MAC_POLICY_LIST_EXCLUSIVE() do {				\
-	WITNESS_SLEEP(1, NULL);						\
+	WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,			\
+ 	    "mac_policy_list_exclusive() at %s:%d", __FILE__, __LINE__);\
 	mtx_lock(&mac_policy_list_lock);				\
 	while (mac_policy_list_busy != 0)				\
 		cv_wait(&mac_policy_list_not_busy,			\
diff --git a/sys/sparc64/sparc64/trap.c b/sys/sparc64/sparc64/trap.c
index fa31ad3..7054048 100644
--- a/sys/sparc64/sparc64/trap.c
+++ b/sys/sparc64/sparc64/trap.c
@@ -629,12 +629,8 @@ syscall(struct trapframe *tf)
 #ifdef DIAGNOSTIC
 	cred_free_thread(td);
 #endif
-#ifdef WITNESS
-	if (witness_list(td)) {
-		panic("system call %s returning with mutex(s) held\n",
-		    syscallnames[code]);
-	}
-#endif
+	WITNESS_WARN(WARN_PANIC, NULL, "System call %s returning",
+	    syscallnames[code]);
 	mtx_assert(&sched_lock, MA_NOTOWNED);
 	mtx_assert(&Giant, MA_NOTOWNED);
 }
diff --git a/sys/vm/uma_core.c b/sys/vm/uma_core.c
index 1fa83df..2e8e704 100644
--- a/sys/vm/uma_core.c
+++ b/sys/vm/uma_core.c
@@ -1327,7 +1327,8 @@ uma_zalloc_arg(uma_zone_t zone, void *udata, int flags)
 	if (!(flags & M_NOWAIT)) {
 		KASSERT(curthread->td_intr_nesting_level == 0,
 		   ("malloc(M_WAITOK) in interrupt context"));
-		WITNESS_SLEEP(1, NULL);
+		WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
+		    "malloc() of \"%s\"", zone->uz_name);
 	}
 
 zalloc_restart: