diff --git a/src/add-ons/kernel/bus_managers/firewire/util.c b/src/add-ons/kernel/bus_managers/firewire/util.c
index 00c8cc2621..bc5ef5c9cb 100644
--- a/src/add-ons/kernel/bus_managers/firewire/util.c
+++ b/src/add-ons/kernel/bus_managers/firewire/util.c
@@ -46,8 +46,10 @@ alloc_mem(void **virt, void **phy, size_t size, uint32 protection,
 	TRACE("allocating %ld bytes for %s\n", size, name);
 
 	size = round_to_pagesize(size);
-	area = create_area(name, &virtadr, B_ANY_KERNEL_ADDRESS, size, B_CONTIGUOUS,
-		protection);
+	area = create_area(name, &virtadr, B_ANY_KERNEL_ADDRESS, size,
+		B_32_BIT_MEMORY, protection);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (area < B_OK) {
 		ERROR("couldn't allocate area %s\n", name);
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/ac97/ali5451/util.c b/src/add-ons/kernel/drivers/audio/ac97/ali5451/util.c
index f7c14b3851..ec98bcf41e 100644
--- a/src/add-ons/kernel/drivers/audio/ac97/ali5451/util.c
+++ b/src/add-ons/kernel/drivers/audio/ac97/ali5451/util.c
@@ -43,7 +43,9 @@ alloc_mem(void **phy, void **log, size_t size, const char *name)
 
 	size = round_to_pagesize(size);
 	areaid = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		TRACE("alloc_mem: couldn't allocate area %s\n", name);
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/ac97/auich/util.c b/src/add-ons/kernel/drivers/audio/ac97/auich/util.c
index 900657f259..ec8a371518 100644
--- a/src/add-ons/kernel/drivers/audio/ac97/auich/util.c
+++ b/src/add-ons/kernel/drivers/audio/ac97/auich/util.c
@@ -74,8 +74,10 @@ alloc_mem(phys_addr_t *phy, void **log, size_t size, const char *name)
 	LOG(("allocating %d bytes for %s\n",size,name));
 
 	size = round_to_pagesize(size);
-	area = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size, B_CONTIGUOUS,
-		B_READ_AREA | B_WRITE_AREA);
+	area = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (area < B_OK) {
 		PRINT(("couldn't allocate area %s\n", name));
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/ac97/auvia/util.c b/src/add-ons/kernel/drivers/audio/ac97/auvia/util.c
index 86369c4645..727b02215c 100644
--- a/src/add-ons/kernel/drivers/audio/ac97/auvia/util.c
+++ b/src/add-ons/kernel/drivers/audio/ac97/auvia/util.c
@@ -76,7 +76,9 @@ alloc_mem(void **phy, void **log, size_t size, const char *name)
 
 	size = round_to_pagesize(size);
 	areaid = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		PRINT(("couldn't allocate area %s\n",name));
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/ac97/es1370/util.c b/src/add-ons/kernel/drivers/audio/ac97/es1370/util.c
index cc464e580b..9d6029f50a 100644
--- a/src/add-ons/kernel/drivers/audio/ac97/es1370/util.c
+++ b/src/add-ons/kernel/drivers/audio/ac97/es1370/util.c
@@ -76,7 +76,9 @@ alloc_mem(void **phy, void **log, size_t size, const char *name)
 
 	size = round_to_pagesize(size);
 	areaid = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		PRINT(("couldn't allocate area %s\n",name));
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/ac97/geode/geode_controller.cpp b/src/add-ons/kernel/drivers/audio/ac97/geode/geode_controller.cpp
index e4f685b775..44ccdac1b1 100644
--- a/src/add-ons/kernel/drivers/audio/ac97/geode/geode_controller.cpp
+++ b/src/add-ons/kernel/drivers/audio/ac97/geode/geode_controller.cpp
@@ -306,7 +306,10 @@ geode_stream_setup_buffers(geode_stream* stream, const char* desc)
 
 	/* Allocate memory for buffers */
 	stream->buffer_area = create_area("geode buffers", (void**)&buffer,
-		B_ANY_KERNEL_ADDRESS, alloc, B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
+		B_ANY_KERNEL_ADDRESS, alloc, B_32_BIT_MEMORY,
+		B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (stream->buffer_area < B_OK)
 		return stream->buffer_area;
 
@@ -335,7 +338,9 @@ geode_stream_setup_buffers(geode_stream* stream, const char* desc)
 
 	stream->buffer_descriptors_area = create_area("geode buffer descriptors",
 		(void**)&bufferDescriptors, B_ANY_KERNEL_ADDRESS, alloc,
-		B_CONTIGUOUS, 0);
+		B_32_BIT_MEMORY, 0);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (stream->buffer_descriptors_area < B_OK) {
 		delete_area(stream->buffer_area);
 		return stream->buffer_descriptors_area;
diff --git a/src/add-ons/kernel/drivers/audio/ac97/ich/util.c b/src/add-ons/kernel/drivers/audio/ac97/ich/util.c
index eb9e55aa11..8a897a9a19 100644
--- a/src/add-ons/kernel/drivers/audio/ac97/ich/util.c
+++ b/src/add-ons/kernel/drivers/audio/ac97/ich/util.c
@@ -76,7 +76,9 @@ alloc_mem(void **log, void **phy, size_t size, const char *name)
 
 	size = round_to_pagesize(size);
 	areaid = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		PRINT(("couldn't allocate area %s\n",name));
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/ac97/ichaudio/lala/util.c b/src/add-ons/kernel/drivers/audio/ac97/ichaudio/lala/util.c
index f57754d493..e7692fb0ff 100644
--- a/src/add-ons/kernel/drivers/audio/ac97/ichaudio/lala/util.c
+++ b/src/add-ons/kernel/drivers/audio/ac97/ichaudio/lala/util.c
@@ -57,7 +57,9 @@ alloc_mem(void **virt, void **phy, size_t size, uint32 protection,
 
 	size = round_to_pagesize(size);
 	areaid = create_area(name, &virtadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, protection);
+		B_32_BIT_MEMORY, protection);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		PRINT(("couldn't allocate area %s\n",name));
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/echo/util.c b/src/add-ons/kernel/drivers/audio/echo/util.c
index fa9ffa8bfa..55c74512a6 100644
--- a/src/add-ons/kernel/drivers/audio/echo/util.c
+++ b/src/add-ons/kernel/drivers/audio/echo/util.c
@@ -74,8 +74,10 @@ alloc_mem(phys_addr_t *phy, void **log, size_t size, const char *name)
 	LOG(("allocating %d bytes for %s\n",size,name));
 
 	size = round_to_pagesize(size);
-	area = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size, B_CONTIGUOUS,
-		B_READ_AREA | B_WRITE_AREA);
+	area = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (area < B_OK) {
 		PRINT(("couldn't allocate area %s\n",name));
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/emuxki/util.c b/src/add-ons/kernel/drivers/audio/emuxki/util.c
index 86369c4645..727b02215c 100644
--- a/src/add-ons/kernel/drivers/audio/emuxki/util.c
+++ b/src/add-ons/kernel/drivers/audio/emuxki/util.c
@@ -76,7 +76,9 @@ alloc_mem(void **phy, void **log, size_t size, const char *name)
 
 	size = round_to_pagesize(size);
 	areaid = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		PRINT(("couldn't allocate area %s\n",name));
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/audio/ice1712/util.c b/src/add-ons/kernel/drivers/audio/ice1712/util.c
index 0e56f6207e..6192f4c165 100644
--- a/src/add-ons/kernel/drivers/audio/ice1712/util.c
+++ b/src/add-ons/kernel/drivers/audio/ice1712/util.c
@@ -58,7 +58,9 @@ alloc_mem(void **phy, void **log, size_t size, const char *name)
 
 	size = round_to_pagesize(size);
 	areaid = create_area(name, &logadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, B_READ_AREA | B_WRITE_AREA);
+		B_32_BIT_MEMORY, B_READ_AREA | B_WRITE_AREA);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		TRACE("couldn't allocate area %s\n",name);
 		return B_ERROR;
diff --git a/src/add-ons/kernel/drivers/dvb/cx23882/util.c b/src/add-ons/kernel/drivers/dvb/cx23882/util.c
index 94407e473e..3b805f4411 100644
--- a/src/add-ons/kernel/drivers/dvb/cx23882/util.c
+++ b/src/add-ons/kernel/drivers/dvb/cx23882/util.c
@@ -81,7 +81,9 @@ alloc_mem(void **virt, void **phy, size_t size, uint32 protection,
 
 	size = ROUNDUP(size, B_PAGE_SIZE);
 	areaid = create_area(name, &virtadr, B_ANY_KERNEL_ADDRESS, size,
-		B_CONTIGUOUS, protection);
+		B_32_BIT_MEMORY, protection);
+		// TODO: The rest of the code doesn't deal correctly with physical
+		// addresses > 4 GB, so we have to force 32 bit addresses here.
 	if (areaid < B_OK) {
 		TRACE("couldn't allocate area %s\n", name);
 		return B_ERROR;