x86: move __addr_ok to uaccess.h.

Take it out of uaccess_32.h. Since it seems that no users
of the x86_64 exists, we simply pick the i386 version.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

include/asm-x86/uaccess.h

@@ -33,6 +33,10 @@
 
 #define segment_eq(a, b)	((a).seg == (b).seg)
 
+#define __addr_ok(addr)					\
+	((unsigned long __force)(addr) <		\
+	 (current_thread_info()->addr_limit.seg))
+
 /*
  * Test whether a block of memory is a valid user space address.
  * Returns 0 if the range is valid, nonzero otherwise.

include/asm-x86/uaccess_32.h

@@ -20,10 +20,6 @@ extern struct movsl_mask {
 } ____cacheline_aligned_in_smp movsl_mask;
 #endif
 
-#define __addr_ok(addr)					\
-	((unsigned long __force)(addr) <		\
-	 (current_thread_info()->addr_limit.seg))
-
 extern void __put_user_bad(void);
 
 /*

include/asm-x86/uaccess_64.h

@@ -9,9 +9,6 @@
 #include <linux/prefetch.h>
 #include <asm/page.h>
 
-#define __addr_ok(addr) (!((unsigned long)(addr) &			\
-			   (current_thread_info()->addr_limit.seg)))
-
 #define ARCH_HAS_SEARCH_EXTABLE
 
 extern void __put_user_1(void);