diff --git a/libc/kernel/common/linux/swab.h b/libc/kernel/common/linux/swab.h
index 8f7d0d6..2a91797 100644
--- a/libc/kernel/common/linux/swab.h
+++ b/libc/kernel/common/linux/swab.h
@@ -7,74 +7,89 @@
  ***   structures, and macros generated from the original header, and thus,
  ***   contains no copyrightable information.
  ***
+ ***   To edit the content of this header, modify the corresponding
+ ***   source file (e.g. under external/kernel-headers/original/) then
+ ***   run bionic/libc/kernel/tools/update_all.py
+ ***
+ ***   Any manual change here will be lost the next time this script will
+ ***   be run. You've been warned!
+ ***
  ****************************************************************************
  ****************************************************************************/
 #ifndef _LINUX_SWAB_H
 #define _LINUX_SWAB_H
-
 #include <linux/types.h>
 #include <linux/compiler.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <asm/swab.h>
-
 #define ___constant_swab16(x) ((__u16)(   (((__u16)(x) & (__u16)0x00ffU) << 8) |   (((__u16)(x) & (__u16)0xff00U) >> 8)))
-
 #define ___constant_swab32(x) ((__u32)(   (((__u32)(x) & (__u32)0x000000ffUL) << 24) |   (((__u32)(x) & (__u32)0x0000ff00UL) << 8) |   (((__u32)(x) & (__u32)0x00ff0000UL) >> 8) |   (((__u32)(x) & (__u32)0xff000000UL) >> 24)))
-
 #define ___constant_swab64(x) ((__u64)(   (((__u64)(x) & (__u64)0x00000000000000ffULL) << 56) |   (((__u64)(x) & (__u64)0x000000000000ff00ULL) << 40) |   (((__u64)(x) & (__u64)0x0000000000ff0000ULL) << 24) |   (((__u64)(x) & (__u64)0x00000000ff000000ULL) << 8) |   (((__u64)(x) & (__u64)0x000000ff00000000ULL) >> 8) |   (((__u64)(x) & (__u64)0x0000ff0000000000ULL) >> 24) |   (((__u64)(x) & (__u64)0x00ff000000000000ULL) >> 40) |   (((__u64)(x) & (__u64)0xff00000000000000ULL) >> 56)))
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define ___constant_swahw32(x) ((__u32)(   (((__u32)(x) & (__u32)0x0000ffffUL) << 16) |   (((__u32)(x) & (__u32)0xffff0000UL) >> 16)))
-
 #define ___constant_swahb32(x) ((__u32)(   (((__u32)(x) & (__u32)0x00ff00ffUL) << 8) |   (((__u32)(x) & (__u32)0xff00ff00UL) >> 8)))
-
 #ifdef __arch_swab16
 #else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #ifdef __arch_swab32
 #else
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifdef __arch_swab64
 #elif defined(__SWAB_64_THRU_32__)
 #else
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifdef __arch_swahw32
 #else
 #endif
 #ifdef __arch_swahb32
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #else
 #endif
 #define __swab16(x)   (__builtin_constant_p((__u16)(x)) ?   ___constant_swab16(x) :   __fswab16(x))
 #define __swab32(x)   (__builtin_constant_p((__u32)(x)) ?   ___constant_swab32(x) :   __fswab32(x))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __swab64(x)   (__builtin_constant_p((__u64)(x)) ?   ___constant_swab64(x) :   __fswab64(x))
 #define __swahw32(x)   (__builtin_constant_p((__u32)(x)) ?   ___constant_swahw32(x) :   __fswahw32(x))
 #define __swahb32(x)   (__builtin_constant_p((__u32)(x)) ?   ___constant_swahb32(x) :   __fswahb32(x))
 #ifdef __arch_swab16p
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #else
 #endif
 #ifdef __arch_swab32p
 #else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #ifdef __arch_swab64p
 #else
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifdef __arch_swahw32p
 #else
 #endif
 #ifdef __arch_swahb32p
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #else
 #endif
 #ifdef __arch_swab16s
 #else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #ifdef __arch_swab32s
 #else
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #ifdef __arch_swab64s
 #else
 #endif
 #ifdef __arch_swahw32s
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #else
 #endif
 #ifdef __arch_swahb32s
 #else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
 #endif