This patch is out of uClibc trunk.

--- uClibc/libc/sysdeps/linux/i386/bits/kernel_types.h	2008/07/23 11:23:36	22935
+++ uClibc/libc/sysdeps/linux/i386/bits/kernel_types.h	2008/12/23 09:04:50	24515
@@ -7,10 +7,14 @@
 
 /* a hack for compiling a 32 bit user space with 64 bit
  * kernel on x86_64  */
-#if !defined(__ARCH_I386_POSIX_TYPES_H) && !defined(_ASM_X86_64_POSIX_TYPES_H)
+#if !defined(__ARCH_I386_POSIX_TYPES_H) && \
+    !defined(_ASM_X86_64_POSIX_TYPES_H) && \
+    !defined(_ASM_X86_POSIX_TYPES_32_H) && \
+    !defined(_ASM_X86_POSIX_TYPES_64_H)
 #define _ASM_X86_64_POSIX_TYPES_H
 #define __ARCH_I386_POSIX_TYPES_H
-
+#define _ASM_X86_POSIX_TYPES_32_H
+#define _ASM_X86_POSIX_TYPES_64_H
 typedef unsigned short	__kernel_dev_t;
 typedef unsigned long	__kernel_ino_t;
 typedef unsigned short	__kernel_mode_t;