i386: add delay_fini()

Not all of the clocks with a delay(9) implementation necessarily keep
ticking across suspend/resume.  We need a clean way to reverse
delay_init() during suspend when those clocks stop ticking.

Hence, delay_fini().  delay_fini() resets delay_func() to
i8254_delay() if the given function pointer is the active delay(9)
implementation.

ok mlarkin@

1 files changed, 2 insertions, 1 deletions

diff --git a/sys/arch/i386/include/cpu.h b/sys/arch/i386/include/cpu.h
index 68bc3542a0f..6d707fc2d77 100644
--- a/sys/arch/i386/include/cpu.h
+++ b/sys/arch/i386/include/cpu.h
@@ -1,4 +1,4 @@
-/*	$OpenBSD: cpu.h,v 1.179 2022/08/29 02:58:13 jsg Exp $	*/
+/*	$OpenBSD: cpu.h,v 1.180 2022/11/08 14:49:20 cheloha Exp $	*/
 /*	$NetBSD: cpu.h,v 1.35 1996/05/05 19:29:26 christos Exp $	*/
 
 /*-
@@ -302,6 +302,7 @@ void signotify(struct proc *);
  * We need a machine-independent name for this.
  */
 extern void (*delay_func)(int);
+void delay_fini(void(*)(int));
 void delay_init(void(*)(int), int);
 struct timeval;