diff --git a/libc/kernel/common/linux/bio.h b/libc/kernel/common/linux/bio.h
index 4e91314..1de8e70 100644
--- a/libc/kernel/common/linux/bio.h
+++ b/libc/kernel/common/linux/bio.h
@@ -7,165 +7,160 @@
  ***   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_BIO_H
 #define __LINUX_BIO_H
-
 #include <linux/highmem.h>
 #include <linux/mempool.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/ioprio.h>
-
 #include <asm/io.h>
-
 #if defined(BIO_VMERGE_MAX_SIZE) && defined(BIO_VMERGE_BOUNDARY)
 #define BIOVEC_VIRT_START_SIZE(x) (bvec_to_phys(x) & (BIO_VMERGE_BOUNDARY - 1))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIOVEC_VIRT_OVERSIZE(x) ((x) > BIO_VMERGE_MAX_SIZE)
 #else
 #define BIOVEC_VIRT_START_SIZE(x) 0
 #define BIOVEC_VIRT_OVERSIZE(x) 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #ifndef BIO_VMERGE_BOUNDARY
 #define BIO_VMERGE_BOUNDARY 0
 #endif
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_DEBUG
-
 #ifdef BIO_DEBUG
 #define BIO_BUG_ON BUG_ON
 #else
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_BUG_ON
 #endif
-
 #define BIO_MAX_PAGES 256
 #define BIO_MAX_SIZE (BIO_MAX_PAGES << PAGE_CACHE_SHIFT)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_MAX_SECTORS (BIO_MAX_SIZE >> 9)
-
 struct bio_vec {
  struct page *bv_page;
  unsigned int bv_len;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int bv_offset;
 };
-
 struct bio_set;
 struct bio;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 typedef int (bio_end_io_t) (struct bio *, unsigned int, int);
 typedef void (bio_destructor_t) (struct bio *);
-
 struct bio {
  sector_t bi_sector;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct bio *bi_next;
  struct block_device *bi_bdev;
  unsigned long bi_flags;
  unsigned long bi_rw;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned short bi_vcnt;
  unsigned short bi_idx;
-
  unsigned short bi_phys_segments;
-
  unsigned short bi_hw_segments;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  unsigned int bi_size;
-
  unsigned int bi_hw_front_size;
  unsigned int bi_hw_back_size;
-
  unsigned int bi_max_vecs;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  struct bio_vec *bi_io_vec;
-
  bio_end_io_t *bi_end_io;
  atomic_t bi_cnt;
-
  void *bi_private;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  bio_destructor_t *bi_destructor;
 };
-
 #define BIO_UPTODATE 0  
 #define BIO_RW_BLOCK 1  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_EOF 2  
 #define BIO_SEG_VALID 3  
 #define BIO_CLONED 4  
 #define BIO_BOUNCED 5  
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_USER_MAPPED 6  
 #define BIO_EOPNOTSUPP 7  
 #define bio_flagged(bio, flag) ((bio)->bi_flags & (1 << (flag)))
-
 #define BIO_POOL_BITS (4)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_POOL_OFFSET (BITS_PER_LONG - BIO_POOL_BITS)
 #define BIO_POOL_MASK (1UL << BIO_POOL_OFFSET)
 #define BIO_POOL_IDX(bio) ((bio)->bi_flags >> BIO_POOL_OFFSET) 
-
 #define BIO_RW 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_RW_AHEAD 1
 #define BIO_RW_BARRIER 2
 #define BIO_RW_FAILFAST 3
 #define BIO_RW_SYNC 4
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_PRIO_SHIFT (8 * sizeof(unsigned long) - IOPRIO_BITS)
 #define bio_prio(bio) ((bio)->bi_rw >> BIO_PRIO_SHIFT)
 #define bio_prio_valid(bio) ioprio_valid(bio_prio(bio))
-
 #define bio_set_prio(bio, prio) do {   WARN_ON(prio >= (1 << IOPRIO_BITS));   (bio)->bi_rw &= ((1UL << BIO_PRIO_SHIFT) - 1);   (bio)->bi_rw |= ((unsigned long) (prio) << BIO_PRIO_SHIFT);  } while (0)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define bio_iovec_idx(bio, idx) (&((bio)->bi_io_vec[(idx)]))
 #define bio_iovec(bio) bio_iovec_idx((bio), (bio)->bi_idx)
 #define bio_page(bio) bio_iovec((bio))->bv_page
 #define bio_offset(bio) bio_iovec((bio))->bv_offset
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define bio_segments(bio) ((bio)->bi_vcnt - (bio)->bi_idx)
 #define bio_sectors(bio) ((bio)->bi_size >> 9)
 #define bio_cur_sectors(bio) (bio_iovec(bio)->bv_len >> 9)
 #define bio_data(bio) (page_address(bio_page((bio))) + bio_offset((bio)))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define bio_barrier(bio) ((bio)->bi_rw & (1 << BIO_RW_BARRIER))
 #define bio_sync(bio) ((bio)->bi_rw & (1 << BIO_RW_SYNC))
 #define bio_failfast(bio) ((bio)->bi_rw & (1 << BIO_RW_FAILFAST))
 #define bio_rw_ahead(bio) ((bio)->bi_rw & (1 << BIO_RW_AHEAD))
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define bio_to_phys(bio) (page_to_phys(bio_page((bio))) + (unsigned long) bio_offset((bio)))
 #define bvec_to_phys(bv) (page_to_phys((bv)->bv_page) + (unsigned long) (bv)->bv_offset)
-
 #define __bio_kmap_atomic(bio, idx, kmtype)   (kmap_atomic(bio_iovec_idx((bio), (idx))->bv_page, kmtype) +   bio_iovec_idx((bio), (idx))->bv_offset)
-
 #define __bio_kunmap_atomic(addr, kmtype) kunmap_atomic(addr, kmtype)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __BVEC_END(bio) bio_iovec_idx((bio), (bio)->bi_vcnt - 1)
 #define __BVEC_START(bio) bio_iovec_idx((bio), (bio)->bi_idx)
-
 #ifndef BIOVEC_PHYS_MERGEABLE
 #define BIOVEC_PHYS_MERGEABLE(vec1, vec2)   ((bvec_to_phys((vec1)) + (vec1)->bv_len) == bvec_to_phys((vec2)))
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #endif
-
 #define BIOVEC_VIRT_MERGEABLE(vec1, vec2)   ((((bvec_to_phys((vec1)) + (vec1)->bv_len) | bvec_to_phys((vec2))) & (BIO_VMERGE_BOUNDARY - 1)) == 0)
 #define __BIO_SEG_BOUNDARY(addr1, addr2, mask)   (((addr1) | (mask)) == (((addr2) - 1) | (mask)))
 #define BIOVEC_SEG_BOUNDARY(q, b1, b2)   __BIO_SEG_BOUNDARY(bvec_to_phys((b1)), bvec_to_phys((b2)) + (b2)->bv_len, (q)->seg_boundary_mask)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define BIO_SEG_BOUNDARY(q, b1, b2)   BIOVEC_SEG_BOUNDARY((q), __BVEC_END((b1)), __BVEC_START((b2)))
-
 #define bio_io_error(bio, bytes) bio_endio((bio), (bytes), -EIO)
-
 #define __bio_for_each_segment(bvl, bio, i, start_idx)   for (bvl = bio_iovec_idx((bio), (start_idx)), i = (start_idx);   i < (bio)->bi_vcnt;   bvl++, i++)
-
 #define bio_for_each_segment(bvl, bio, i)   __bio_for_each_segment(bvl, bio, i, (bio)->bi_idx)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define bio_get(bio) atomic_inc(&(bio)->bi_cnt)
-
 struct bio_pair {
  struct bio bio1, bio2;
  struct bio_vec bv1, bv2;
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
  atomic_t cnt;
  int error;
 };
-
 struct request_queue;
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct sg_iovec;
-
 #define bvec_kmap_irq(bvec, flags) (page_address((bvec)->bv_page) + (bvec)->bv_offset)
 #define bvec_kunmap_irq(buf, flags) do { *(flags) = 0; } while (0)
-
 #define __bio_kunmap_irq(buf, flags) bvec_kunmap_irq(buf, flags)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define bio_kmap_irq(bio, flags)   __bio_kmap_irq((bio), (bio)->bi_idx, (flags))
 #define bio_kunmap_irq(buf,flags) __bio_kunmap_irq(buf, flags)
 #endif