diff -r b91324cce2f3 -r 3e486ce0019d jdk/src/windows/native/java/io/io_util_md.c
--- a/jdk/src/windows/native/java/io/io_util_md.c	Tue Nov 29 13:49:18 2011 -0800
+++ b/jdk/src/windows/native/java/io/io_util_md.c	Wed Nov 30 10:57:51 2011 +0000
@@ -478,7 +478,7 @@
 }
 
 JNIEXPORT
-size_t
+jint
 handleRead(jlong fd, void *buf, jint len)
 {
     DWORD read = 0;
@@ -499,10 +499,10 @@
         }
         return -1;
     }
-    return read;
+    return (jint)read;
 }
 
-static size_t writeInternal(jlong fd, const void *buf, jint len, jboolean append)
+static jint writeInternal(jlong fd, const void *buf, jint len, jboolean append)
 {
     BOOL result = 0;
     DWORD written = 0;
@@ -527,16 +527,16 @@
     if ((h == INVALID_HANDLE_VALUE) || (result == 0)) {
         return -1;
     }
-    return (size_t)written;
+    return (jint)written;
 }
 
 JNIEXPORT
-size_t handleWrite(jlong fd, const void *buf, jint len) {
+jint handleWrite(jlong fd, const void *buf, jint len) {
     return writeInternal(fd, buf, len, JNI_FALSE);
 }
 
 JNIEXPORT
-size_t handleAppend(jlong fd, const void *buf, jint len) {
+jint handleAppend(jlong fd, const void *buf, jint len) {
     return writeInternal(fd, buf, len, JNI_TRUE);
 }