diff --git a/sys/kern/uipc_mbuf.c b/sys/kern/uipc_mbuf.c
index 8a984ac2649..148915724cc 100644
--- a/sys/kern/uipc_mbuf.c
+++ b/sys/kern/uipc_mbuf.c
@@ -205,25 +205,11 @@ m_alloc_ref(nmb, how)
 
 	nbytes = round_page(nmb * sizeof(union mext_refcnt));
 	mtx_exit(&mcntfree.m_mtx, MTX_DEF);
-#ifdef WITNESS
-	/*
-	 * XXX: Make sure we don't create lock order problems.
-	 * XXX: We'll grab Giant, but for that to be OK, make sure
-	 * XXX: that either Giant is already held OR make sure that
-	 * XXX: no other locks are held coming in. 
-	 * XXX: Revisit once most of the net stuff gets locks added.
-	 */
-	KASSERT(mtx_owned(&Giant) || witness_list(CURPROC) == 0,
-	    ("m_alloc_ref: Giant must be owned or no locks held")); 
-#endif
-	mtx_enter(&Giant, MTX_DEF);
 	if ((p = (caddr_t)kmem_malloc(mb_map, nbytes, how == M_TRYWAIT ?
 	    M_WAITOK : M_NOWAIT)) == NULL) {
-		mtx_exit(&Giant, MTX_DEF);
 		mtx_enter(&mcntfree.m_mtx, MTX_DEF);
 		return (0);
 	}
-	mtx_exit(&Giant, MTX_DEF);
 	nmb = nbytes / sizeof(union mext_refcnt);
 
 	/*
@@ -275,24 +261,11 @@ m_mballoc(nmb, how)
 	nbytes = round_page(nmb * MSIZE);
 
 	mtx_exit(&mmbfree.m_mtx, MTX_DEF);
-#ifdef WITNESS
-	/*
-	 * XXX: Make sure we don't create lock order problems.
-	 * XXX: We'll grab Giant, but for that to be OK, make sure
-	 * XXX: that either Giant is already held OR make sure that
-	 * XXX: no other locks are held coming in.
-	 * XXX: Revisit once most of the net stuff gets locks added.
-	 */
-	KASSERT(mtx_owned(&Giant) || witness_list(CURPROC) == 0,
-	    ("m_mballoc: Giant must be owned or no locks held"));
-#endif
-	mtx_enter(&Giant, MTX_DEF);
 	p = (caddr_t)kmem_malloc(mb_map, nbytes, M_NOWAIT);
 	if (p == 0 && how == M_TRYWAIT) {
 		atomic_add_long(&mbstat.m_wait, 1);
 		p = (caddr_t)kmem_malloc(mb_map, nbytes, M_WAITOK);
 	}
-	mtx_exit(&Giant, MTX_DEF);
 	mtx_enter(&mmbfree.m_mtx, MTX_DEF);
 
 	/*
@@ -409,21 +382,8 @@ m_clalloc(ncl, how)
 
 	npg = ncl;
 	mtx_exit(&mclfree.m_mtx, MTX_DEF);
-#ifdef WITNESS
-	/*
-	 * XXX: Make sure we don't create lock order problems.
-	 * XXX: We'll grab Giant, but for that to be OK, make sure
-	 * XXX: that either Giant is already held OR make sure that
-	 * XXX: no other locks are held coming in.
-	 * XXX: Revisit once most of the net stuff gets locks added.
-	 */
-	KASSERT(mtx_owned(&Giant) || witness_list(CURPROC) == 0,
-	    ("m_clalloc: Giant must be owned or no locks held"));
-#endif
-	mtx_enter(&Giant, MTX_DEF);
 	p = (caddr_t)kmem_malloc(mb_map, ctob(npg),
 				 how == M_TRYWAIT ? M_WAITOK : M_NOWAIT);
-	mtx_exit(&Giant, MTX_DEF);
 	ncl = ncl * PAGE_SIZE / MCLBYTES;
 	mtx_enter(&mclfree.m_mtx, MTX_DEF);