PATCH: Define MAP_32BIT only if __WORDSIZE is 64

[H.J. Lu]

Hi,

This patch defines MAP_32BIT in x86_64/bits/mman.h only if __WORDSIZE is
64.  OK to install?

Thanks.

H.J.
---
	* sysdeps/unix/sysv/linux/x86_64/bits/mman.h: Include
	<bits/wordsize.h>.
	(MAP_32BIT): Define only if __WORDSIZE is 64.

diff --git a/sysdeps/unix/sysv/linux/x86_64/bits/mman.h b/sysdeps/unix/sysv/linux/x86_64/bits/mman.h
index 28b9160..3f2599a 100644
--- a/sysdeps/unix/sysv/linux/x86_64/bits/mman.h
+++ b/sysdeps/unix/sysv/linux/x86_64/bits/mman.h
@@ -20,6 +20,8 @@
 # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead."
 #endif
 
+#include <bits/wordsize.h>
+
 /* The following definitions basically come from the kernel headers.
    But the kernel header is not namespace clean.  */
 
@@ -51,7 +53,9 @@
 # define MAP_FILE	0
 # define MAP_ANONYMOUS	0x20		/* Don't use a file.  */
 # define MAP_ANON	MAP_ANONYMOUS
-# define MAP_32BIT	0x40		/* Only give out 32-bit addresses.  */
+# if __WORDSIZE == 64
+#  define MAP_32BIT	0x40		/* Only give out 32-bit addresses.  */
+# endif
 #endif
 
 /* These are Linux-specific.  */