diff --git a/include/uapi/linux/a.out.h b/include/uapi/linux/a.out.h
index 7caf44c7fa51bcdec2b7db2efb7439beede648dc..295cd3ef633049cfc5baf00a2668da89e9ffc580 100644
--- a/include/uapi/linux/a.out.h
+++ b/include/uapi/linux/a.out.h
@@ -112,24 +112,7 @@ enum machine_type {
 #define N_TXTADDR(x) (N_MAGIC(x) == QMAGIC ? PAGE_SIZE : 0)
 #endif
 
-/* Address of data segment in memory after it is loaded.
-   Note that it is up to you to define SEGMENT_SIZE
-   on machines not listed here.  */
-#if defined(vax) || defined(hp300) || defined(pyr)
-#define SEGMENT_SIZE page_size
-#endif
-#ifdef	sony
-#define	SEGMENT_SIZE	0x2000
-#endif	/* Sony.  */
-#ifdef is68k
-#define SEGMENT_SIZE 0x20000
-#endif
-#if defined(m68k) && defined(PORTAR)
-#define PAGE_SIZE 0x400
-#define SEGMENT_SIZE PAGE_SIZE
-#endif
-
-#ifdef linux
+/* Address of data segment in memory after it is loaded. */
 #ifndef __KERNEL__
 #include <unistd.h>
 #endif
@@ -142,7 +125,6 @@ enum machine_type {
 #endif
 #endif
 #endif
-#endif
 
 #define _N_SEGMENT_ROUND(x) ALIGN(x, SEGMENT_SIZE)
 
@@ -260,13 +242,7 @@ struct relocation_info
   unsigned int r_extern:1;
   /* Four bits that aren't used, but when writing an object file
      it is desirable to clear them.  */
-#ifdef NS32K
-  unsigned r_bsr:1;
-  unsigned r_disp:1;
-  unsigned r_pad:2;
-#else
   unsigned int r_pad:4;
-#endif
 };
 #endif /* no N_RELOCATION_INFO_DECLARED.  */