Index: Modules/bz2module.c
===================================================================
--- Modules/bz2module.c	(revision 64642)
+++ Modules/bz2module.c	(working copy)
@@ -525,7 +525,7 @@
 		buffersize = Util_NewBufferSize((size_t)0);
 	else
 		buffersize = bytesrequested;
-	if (buffersize > INT_MAX) {
+	if (buffersize > PY_SSIZE_T_MAX) {
 		PyErr_SetString(PyExc_OverflowError,
 				"requested number of bytes is "
 				"more than a Python string can hold");
Index: Objects/fileobject.c
===================================================================
--- Objects/fileobject.c	(revision 64642)
+++ Objects/fileobject.c	(working copy)
@@ -831,7 +831,6 @@
 	long bytesrequested = -1;
 	size_t bytesread, buffersize, chunksize;
 	PyObject *v;
-
 	if (f->f_fp == NULL)
 		return err_closed();
 	/* refuse to mix with f.next() */
@@ -845,6 +844,7 @@
 		buffersize = new_buffersize(f, (size_t)0);
 	else
 		buffersize = bytesrequested;
+
 	if (buffersize > PY_SSIZE_T_MAX) {
 		PyErr_SetString(PyExc_OverflowError,
 	"requested number of bytes is more than a Python string can hold");
@@ -1075,7 +1075,7 @@
 	 * into its buffer.
 	 */
 	total_v_size = MAXBUFSIZE << 1;
-	v = PyString_FromStringAndSize((char*)NULL, (int)total_v_size);
+	v = PyString_FromStringAndSize((char*)NULL, total_v_size);
 	if (v == NULL)
 		return v;
 	/* copy over everything except the last null byte */
@@ -1130,7 +1130,7 @@
 			Py_DECREF(v);
 			return NULL;
 		}
-		if (_PyString_Resize(&v, (int)total_v_size) < 0)
+		if (_PyString_Resize(&v, (Py_ssize_t)total_v_size) < 0)
 			return NULL;
 		/* overwrite the trailing null byte */
 		pvfree = BUF(v) + (prev_v_size - 1);