diff --git a/sys/alpha/alpha/busdma_machdep.c b/sys/alpha/alpha/busdma_machdep.c
index a669d703f1e1..1ecc896dbdf9 100644
--- a/sys/alpha/alpha/busdma_machdep.c
+++ b/sys/alpha/alpha/busdma_machdep.c
@@ -85,7 +85,6 @@ static int free_bpages;
 static int reserved_bpages;
 static int active_bpages;
 static int total_bpages;
-static bus_addr_t bounce_lowaddr = BUS_SPACE_MAXADDR;
 
 struct bus_dmamap {
 	struct bp_list	       bpages;
@@ -250,14 +249,6 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 	if (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) {
 		/* Must bounce */
 
-		if (lowaddr > bounce_lowaddr) {
-			/*
-			 * Go through the pool and kill any pages
-			 * that don't reside below lowaddr.
-			 */
-			panic("bus_dma_tag_create: page reallocation "
-			      "not implemented");
-		}
 		if (ptoa(total_bpages) < maxsize) {
 			int pages;
 
@@ -367,14 +358,6 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
 		  && total_bpages < maxpages)) {
 			int pages;
 
-			if (dmat->lowaddr > bounce_lowaddr) {
-				/*
-				 * Go through the pool and kill any pages
-				 * that don't reside below lowaddr.
-				 */
-				panic("bus_dmamap_create: page reallocation "
-				      "not implemented");
-			}
 			pages = atop(dmat->maxsize) + 1;
 			pages = MIN(maxpages - total_bpages, pages);
 
diff --git a/sys/amd64/amd64/busdma_machdep.c b/sys/amd64/amd64/busdma_machdep.c
index 9d631f2a3947..34a3d0816c04 100644
--- a/sys/amd64/amd64/busdma_machdep.c
+++ b/sys/amd64/amd64/busdma_machdep.c
@@ -105,7 +105,6 @@ static struct mtx bounce_lock;
 static int total_bpages;
 static int busdma_zonecount;
 static STAILQ_HEAD(, bounce_zone) bounce_zone_list;
-static bus_addr_t bounce_lowaddr = BUS_SPACE_MAXADDR;
 
 SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters");
 SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0,
@@ -290,14 +289,6 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 			return (error);
 		bz = newtag->bounce_zone;
 
-		if (lowaddr > bounce_lowaddr) {
-			/*
-			 * Go through the pool and kill any pages
-			 * that don't reside below lowaddr.
-			 */
-			panic("bus_dma_tag_create: page reallocation "
-			      "not implemented");
-		}
 		if (ptoa(bz->total_bpages) < maxsize) {
 			int pages;
 
@@ -419,14 +410,6 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
 		 || (dmat->map_count > 0 && total_bpages < maxpages)) {
 			int pages;
 
-			if (dmat->lowaddr > bounce_lowaddr) {
-				/*
-				 * Go through the pool and kill any pages
-				 * that don't reside below lowaddr.
-				 */
-				panic("bus_dmamap_create: page reallocation "
-				      "not implemented");
-			}
 			pages = MAX(atop(dmat->maxsize), 1);
 			pages = MIN(maxpages - total_bpages, pages);
 			if (alloc_bounce_pages(dmat, pages) < pages)
diff --git a/sys/i386/i386/busdma_machdep.c b/sys/i386/i386/busdma_machdep.c
index 9d631f2a3947..34a3d0816c04 100644
--- a/sys/i386/i386/busdma_machdep.c
+++ b/sys/i386/i386/busdma_machdep.c
@@ -105,7 +105,6 @@ static struct mtx bounce_lock;
 static int total_bpages;
 static int busdma_zonecount;
 static STAILQ_HEAD(, bounce_zone) bounce_zone_list;
-static bus_addr_t bounce_lowaddr = BUS_SPACE_MAXADDR;
 
 SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters");
 SYSCTL_INT(_hw_busdma, OID_AUTO, total_bpages, CTLFLAG_RD, &total_bpages, 0,
@@ -290,14 +289,6 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 			return (error);
 		bz = newtag->bounce_zone;
 
-		if (lowaddr > bounce_lowaddr) {
-			/*
-			 * Go through the pool and kill any pages
-			 * that don't reside below lowaddr.
-			 */
-			panic("bus_dma_tag_create: page reallocation "
-			      "not implemented");
-		}
 		if (ptoa(bz->total_bpages) < maxsize) {
 			int pages;
 
@@ -419,14 +410,6 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
 		 || (dmat->map_count > 0 && total_bpages < maxpages)) {
 			int pages;
 
-			if (dmat->lowaddr > bounce_lowaddr) {
-				/*
-				 * Go through the pool and kill any pages
-				 * that don't reside below lowaddr.
-				 */
-				panic("bus_dmamap_create: page reallocation "
-				      "not implemented");
-			}
 			pages = MAX(atop(dmat->maxsize), 1);
 			pages = MIN(maxpages - total_bpages, pages);
 			if (alloc_bounce_pages(dmat, pages) < pages)
diff --git a/sys/ia64/ia64/busdma_machdep.c b/sys/ia64/ia64/busdma_machdep.c
index 6e4773e3f630..911e9e7a0dc0 100644
--- a/sys/ia64/ia64/busdma_machdep.c
+++ b/sys/ia64/ia64/busdma_machdep.c
@@ -87,7 +87,6 @@ static int active_bpages;
 static int total_bpages;
 static int total_bounced;
 static int total_deferred;
-static bus_addr_t bounce_lowaddr = BUS_SPACE_MAXADDR;
 
 SYSCTL_NODE(_hw, OID_AUTO, busdma, CTLFLAG_RD, 0, "Busdma parameters");
 SYSCTL_INT(_hw_busdma, OID_AUTO, free_bpages, CTLFLAG_RD, &free_bpages, 0,
@@ -268,14 +267,6 @@ bus_dma_tag_create(bus_dma_tag_t parent, bus_size_t alignment,
 	if (newtag->lowaddr < ptoa(Maxmem) && (flags & BUS_DMA_ALLOCNOW) != 0) {
 		/* Must bounce */
 
-		if (lowaddr > bounce_lowaddr) {
-			/*
-			 * Go through the pool and kill any pages
-			 * that don't reside below lowaddr.
-			 */
-			panic("bus_dma_tag_create: page reallocation "
-			      "not implemented");
-		}
 		if (ptoa(total_bpages) < maxsize) {
 			int pages;
 
@@ -372,14 +363,6 @@ bus_dmamap_create(bus_dma_tag_t dmat, int flags, bus_dmamap_t *mapp)
 		 || (dmat->map_count > 0 && total_bpages < maxpages)) {
 			int pages;
 
-			if (dmat->lowaddr > bounce_lowaddr) {
-				/*
-				 * Go through the pool and kill any pages
-				 * that don't reside below lowaddr.
-				 */
-				panic("bus_dmamap_create: page reallocation "
-				      "not implemented");
-			}
 			pages = MAX(atop(dmat->maxsize), 1);
 			pages = MIN(maxpages - total_bpages, pages);
 			if (alloc_bounce_pages(dmat, pages) < pages)