diff --git a/libc/kernel/common/linux/gfp.h b/libc/kernel/common/linux/gfp.h
index 0a59fe9..258ec08 100644
--- a/libc/kernel/common/linux/gfp.h
+++ b/libc/kernel/common/linux/gfp.h
@@ -7,70 +7,73 @@
  ***   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_GFP_H
 #define __LINUX_GFP_H
-
 #include <linux/mmzone.h>
 #include <linux/stddef.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/linkage.h>
-
 struct vm_area_struct;
-
 #define __GFP_DMA ((__force gfp_t)0x01u)
 #define __GFP_HIGHMEM ((__force gfp_t)0x02u)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #if BITS_PER_LONG < 64
 #define __GFP_DMA32 ((__force gfp_t)0x00)  
 #else
 #define __GFP_DMA32 ((__force gfp_t)0x04)  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #define __GFP_WAIT ((__force gfp_t)0x10u)  
 #define __GFP_HIGH ((__force gfp_t)0x20u)  
 #define __GFP_IO ((__force gfp_t)0x40u)  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __GFP_FS ((__force gfp_t)0x80u)  
 #define __GFP_COLD ((__force gfp_t)0x100u)  
 #define __GFP_NOWARN ((__force gfp_t)0x200u)  
 #define __GFP_REPEAT ((__force gfp_t)0x400u)  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __GFP_NOFAIL ((__force gfp_t)0x800u)  
 #define __GFP_NORETRY ((__force gfp_t)0x1000u) 
 #define __GFP_NO_GROW ((__force gfp_t)0x2000u) 
 #define __GFP_COMP ((__force gfp_t)0x4000u) 
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __GFP_ZERO ((__force gfp_t)0x8000u) 
 #define __GFP_NOMEMALLOC ((__force gfp_t)0x10000u)  
 #define __GFP_HARDWALL ((__force gfp_t)0x20000u)  
-
 #define __GFP_BITS_SHIFT 20  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __GFP_BITS_MASK ((__force gfp_t)((1 << __GFP_BITS_SHIFT) - 1))
-
 #define GFP_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_FS|   __GFP_COLD|__GFP_NOWARN|__GFP_REPEAT|   __GFP_NOFAIL|__GFP_NORETRY|__GFP_NO_GROW|__GFP_COMP|   __GFP_NOMEMALLOC|__GFP_HARDWALL)
-
 #define GFP_NOWAIT (GFP_ATOMIC & ~__GFP_HIGH)
-
 #define GFP_ATOMIC (__GFP_HIGH)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define GFP_NOIO (__GFP_WAIT)
 #define GFP_NOFS (__GFP_WAIT | __GFP_IO)
 #define GFP_KERNEL (__GFP_WAIT | __GFP_IO | __GFP_FS)
 #define GFP_USER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define GFP_HIGHUSER (__GFP_WAIT | __GFP_IO | __GFP_FS | __GFP_HARDWALL |   __GFP_HIGHMEM)
-
 #define GFP_DMA __GFP_DMA
-
 #define GFP_DMA32 __GFP_DMA32
-
 #ifndef HAVE_ARCH_FREE_PAGE
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #define alloc_pages(gfp_mask, order)   alloc_pages_node(numa_node_id(), gfp_mask, order)
 #define alloc_page_vma(gfp_mask, vma, addr) alloc_pages(gfp_mask, 0)
 #define alloc_page(gfp_mask) alloc_pages(gfp_mask, 0)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __get_free_page(gfp_mask)   __get_free_pages((gfp_mask),0)
-
 #define __get_dma_pages(gfp_mask, order)   __get_free_pages((gfp_mask) | GFP_DMA,(order))
-
 #define __free_page(page) __free_pages((page), 0)
 #define free_page(addr) free_pages((addr),0)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif