diff --git a/libc/kernel/common/linux/irqflags.h b/libc/kernel/common/linux/irqflags.h
index 1bf3f90..af3aee9 100644
--- a/libc/kernel/common/linux/irqflags.h
+++ b/libc/kernel/common/linux/irqflags.h
@@ -7,28 +7,37 @@
  ***   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_TRACE_IRQFLAGS_H
 #define _LINUX_TRACE_IRQFLAGS_H
-
 #define trace_hardirqs_on() do { } while (0)
 #define trace_hardirqs_off() do { } while (0)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define trace_softirqs_on(ip) do { } while (0)
 #define trace_softirqs_off(ip) do { } while (0)
 #define trace_hardirq_context(p) 0
 #define trace_softirq_context(p) 0
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define trace_hardirqs_enabled(p) 0
 #define trace_softirqs_enabled(p) 0
 #define trace_hardirq_enter() do { } while (0)
 #define trace_hardirq_exit() do { } while (0)
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define trace_softirq_enter() do { } while (0)
 #define trace_softirq_exit() do { } while (0)
 #define INIT_TRACE_IRQFLAGS
-
 #define raw_local_irq_disable() local_irq_disable()
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 #define raw_local_irq_enable() local_irq_enable()
 #define raw_local_irq_save(flags) local_irq_save(flags)
 #define raw_local_irq_restore(flags) local_irq_restore(flags)
-
 #endif
+/* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */