diff --git a/Python/bltinmodule.c b/Python/bltinmodule.c
index 14fb349..ce8b7f5 100644
--- a/Python/bltinmodule.c
+++ b/Python/bltinmodule.c
@@ -1704,6 +1704,7 @@
 	SETBUILTIN("basestring",	&PyBaseString_Type);
 	SETBUILTIN("bool",		&PyBool_Type);
 	SETBUILTIN("buffer",		&PyBuffer_Type);
+        SETBUILTIN("memoryview",        &PyMemoryView_Type);
 	SETBUILTIN("bytes",		&PyBytes_Type);
 	SETBUILTIN("classmethod",	&PyClassMethod_Type);
 #ifndef WITHOUT_COMPLEX
diff --git a/Python/getargs.c b/Python/getargs.c
index ce1fef7..a0aa872 100644
--- a/Python/getargs.c
+++ b/Python/getargs.c
@@ -1179,21 +1179,31 @@
 		void **p = va_arg(*p_va, void **);
 		PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
 		int count;
+                int temp=-1;
+                PyBuffer view;
 			
 		if (pb == NULL || 
-		    pb->bf_getwritebuffer == NULL ||
-		    pb->bf_getsegcount == NULL)
-			return converterr("read-write buffer", arg, msgbuf, bufsize);
-		if ((*pb->bf_getsegcount)(arg, NULL) != 1)
+		    pb->bf_getbuffer == NULL ||
+                    ((temp = (*pb->bf_getbuffer)(arg, &view, 
+                                                 PyBUF_SIMPLE)) != 0) ||
+                    view.readonly == 1) {
+                        if (temp==0 && pb->bf_releasebuffer != NULL) {
+                                (*pb->bf_releasebuffer)(arg, &view);
+                        }
 			return converterr("single-segment read-write buffer", 
 					  arg, msgbuf, bufsize);
-		if ((count = pb->bf_getwritebuffer(arg, 0, p)) < 0)
+                }
+                        
+                if ((count = view.len) < 0)
 			return converterr("(unspecified)", arg, msgbuf, bufsize);
+                *p = view.buf;
 		if (*format == '#') {
 			FETCH_SIZE;
 			STORE_SIZE(count);
 			format++;
 		}
+                if (pb->bf_releasebuffer != NULL)
+                        (*pb->bf_releasebuffer)(arg, &view);
 		break;
 	}
 		
@@ -1201,23 +1211,27 @@
 		char **p = va_arg(*p_va, char **);
 		PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
 		int count;
+                PyBuffer view;
 		
 		if (*format++ != '#')
 			return converterr(
 				"invalid use of 't' format character", 
 				arg, msgbuf, bufsize);
-		if (pb == NULL || pb->bf_getcharbuffer == NULL ||
-		    pb->bf_getsegcount == NULL)
+		if (pb == NULL || pb->bf_getbuffer == NULL)
 			return converterr(
 				"string or read-only character buffer",
 				arg, msgbuf, bufsize);
 
-		if (pb->bf_getsegcount(arg, NULL) != 1)
-			return converterr(
-				"string or single-segment read-only buffer",
-				arg, msgbuf, bufsize);
+		if ((*pb->bf_getbuffer)(arg, &view, PyBUF_CHARACTER) != 0) 
+			return converterr("string or single-segment read-only buffer",
+                                          arg, msgbuf, bufsize);
 
-		count = pb->bf_getcharbuffer(arg, 0, p);
+                count = view.len;
+                *p = view.buf;
+                /* XXX : shouldn't really release buffer, but it should be O.K.
+                */
+                if (pb->bf_releasebuffer != NULL) 
+                        (*pb->bf_releasebuffer)(arg, &view);
 		if (count < 0)
 			return converterr("(unspecified)", arg, msgbuf, bufsize);
 		{
@@ -1241,19 +1255,24 @@
 {
 	PyBufferProcs *pb = arg->ob_type->tp_as_buffer;
 	Py_ssize_t count;
+        PyBuffer view;
+
+        *errmsg = NULL;
+        *p = NULL;
 	if (pb == NULL ||
-	    pb->bf_getreadbuffer == NULL ||
-	    pb->bf_getsegcount == NULL) {
+	    pb->bf_getbuffer == NULL) {
 		*errmsg = "string or read-only buffer";
 		return -1;
 	}
-	if ((*pb->bf_getsegcount)(arg, NULL) != 1) {
+
+	if ((*pb->bf_getbuffer)(arg, &view, PyBUF_SIMPLE) != 0) {
 		*errmsg = "string or single-segment read-only buffer";
 		return -1;
 	}
-	if ((count = (*pb->bf_getreadbuffer)(arg, 0, p)) < 0) {
-		*errmsg = "(unspecified)";
-	}
+        count = view.len;
+        *p = view.buf;
+        if (pb->bf_releasebuffer != NULL)
+                (*pb->bf_releasebuffer)(arg, &view);
 	return count;
 }
 
diff --git a/Python/marshal.c b/Python/marshal.c
index 975ec8d..c5952b2 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -358,12 +358,18 @@
 		w_long(co->co_firstlineno, p);
 		w_object(co->co_lnotab, p);
 	}
-	else if (PyObject_CheckReadBuffer(v)) {
+	else if (PyObject_CheckBuffer(v)) {
 		/* Write unknown buffer-style objects as a string */
 		char *s;
 		PyBufferProcs *pb = v->ob_type->tp_as_buffer;
+                PyBuffer view;
+		if ((*pb->bf_getbuffer)(v, &view, PyBUF_SIMPLE) != 0) {
+                        w_byte(TYPE_UNKNOWN, p);
+                        p->error = 1;
+                }
 		w_byte(TYPE_STRING, p);
-		n = (*pb->bf_getreadbuffer)(v, 0, (void **)&s);
+                n = view.len;
+                s = view.buf;                        
 		if (n > INT_MAX) {
 			p->depth--;
 			p->error = 1;
@@ -371,6 +377,8 @@
 		}
 		w_long((long)n, p);
 		w_string(s, (int)n, p);
+                if (pb->bf_releasebuffer != NULL)
+                        (*pb->bf_releasebuffer)(v, &view);
 	}
 	else {
 		w_byte(TYPE_UNKNOWN, p);