diff --git a/libc/kernel/common/linux/spinlock.h b/libc/kernel/common/linux/spinlock.h
index 5504c9e..b1d64c6 100644
--- a/libc/kernel/common/linux/spinlock.h
+++ b/libc/kernel/common/linux/spinlock.h
@@ -7,106 +7,95 @@
  ***   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_SPINLOCK_H
 #define __LINUX_SPINLOCK_H
-
 #include <linux/preempt.h>
 #include <linux/linkage.h>
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <linux/compiler.h>
 #include <linux/thread_info.h>
 #include <linux/kernel.h>
 #include <linux/stringify.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #include <asm/system.h>
-
 #define LOCK_SECTION_NAME ".text.lock."KBUILD_BASENAME
-
 #define LOCK_SECTION_START(extra)   ".subsection 1\n\t"   extra   ".ifndef " LOCK_SECTION_NAME "\n\t"   LOCK_SECTION_NAME ":\n\t"   ".endif\n"
-
 #define LOCK_SECTION_END   ".previous\n\t"
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define __lockfunc fastcall __attribute__((section(".spinlock.text")))
-
 #include <linux/spinlock_types.h>
-
 #include <linux/spinlock_up.h>
-
 #define spin_lock_init(lock)   do { *(lock) = SPIN_LOCK_UNLOCKED; } while (0)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define rwlock_init(lock)   do { *(lock) = RW_LOCK_UNLOCKED; } while (0)
-
 #define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock)
-
 #define spin_unlock_wait(lock) __raw_spin_unlock_wait(&(lock)->raw_lock)
-
 #include <linux/spinlock_api_up.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define _raw_spin_lock(lock) __raw_spin_lock(&(lock)->raw_lock)
 #define _raw_spin_lock_flags(lock, flags)   __raw_spin_lock_flags(&(lock)->raw_lock, *(flags))
 #define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock)
 #define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock)
 #define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock)
 #define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
 #define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
 #define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
-
 #define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock)
 #define write_can_lock(rwlock) __raw_write_can_lock(&(rwlock)->raw_lock)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define spin_trylock(lock) __cond_lock(_spin_trylock(lock))
 #define read_trylock(lock) __cond_lock(_read_trylock(lock))
 #define write_trylock(lock) __cond_lock(_write_trylock(lock))
-
 #define spin_lock(lock) _spin_lock(lock)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define spin_lock_nested(lock, subclass) _spin_lock(lock)
-
 #define write_lock(lock) _write_lock(lock)
 #define read_lock(lock) _read_lock(lock)
-
 #define spin_lock_irqsave(lock, flags) _spin_lock_irqsave(lock, flags)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define read_lock_irqsave(lock, flags) _read_lock_irqsave(lock, flags)
 #define write_lock_irqsave(lock, flags) _write_lock_irqsave(lock, flags)
-
 #define spin_lock_irq(lock) _spin_lock_irq(lock)
 #define spin_lock_bh(lock) _spin_lock_bh(lock)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define read_lock_irq(lock) _read_lock_irq(lock)
 #define read_lock_bh(lock) _read_lock_bh(lock)
-
 #define write_lock_irq(lock) _write_lock_irq(lock)
 #define write_lock_bh(lock) _write_lock_bh(lock)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define spin_unlock(lock) _spin_unlock(lock)
 #define read_unlock(lock) _read_unlock(lock)
 #define write_unlock(lock) _write_unlock(lock)
 #define spin_unlock_irq(lock) _spin_unlock_irq(lock)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define read_unlock_irq(lock) _read_unlock_irq(lock)
 #define write_unlock_irq(lock) _write_unlock_irq(lock)
-
 #define spin_unlock_irqrestore(lock, flags)   _spin_unlock_irqrestore(lock, flags)
 #define spin_unlock_bh(lock) _spin_unlock_bh(lock)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define read_unlock_irqrestore(lock, flags)   _read_unlock_irqrestore(lock, flags)
 #define read_unlock_bh(lock) _read_unlock_bh(lock)
-
 #define write_unlock_irqrestore(lock, flags)   _write_unlock_irqrestore(lock, flags)
 #define write_unlock_bh(lock) _write_unlock_bh(lock)
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define spin_trylock_bh(lock) __cond_lock(_spin_trylock_bh(lock))
-
 #define spin_trylock_irq(lock)  ({   local_irq_disable();   _spin_trylock(lock) ?   1 : ({ local_irq_enable(); 0; });  })
-
 #define spin_trylock_irqsave(lock, flags)  ({   local_irq_save(flags);   _spin_trylock(lock) ?   1 : ({ local_irq_restore(flags); 0; });  })
-
 #include <asm/atomic.h>
-
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define atomic_dec_and_lock(atomic, lock)   __cond_lock(_atomic_dec_and_lock(atomic, lock))
-
 #define spin_can_lock(lock) (!spin_is_locked(lock))
-
 #endif