[src/trunk]: src/sys/arch/alpha/alpha Contrary to comment here, nowadays hard...

[rin <rin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/7173eecc1656
branches:  trunk
changeset: 1020532:7173eecc1656
user:      rin <rin%NetBSD.org@localhost>
date:      Thu Apr 15 00:19:52 2021 +0000

description:
Contrary to comment here, nowadays hardclock() and statclock() should be
called with cpu_intr_p() is turning on, if used from the interrupt context.

Otherwise, entropy_enter() is used instead of entropy_enter_intr(), which
results in KASSERT() failure.

Therefore, bump ci_intrdepth for clock interrupt. Remove stale comment also.

diffstat:

 sys/arch/alpha/alpha/interrupt.c |  12 ++++--------
 1 files changed, 4 insertions(+), 8 deletions(-)

diffs (40 lines):

diff -r 6bc4db781aea -r 7173eecc1656 sys/arch/alpha/alpha/interrupt.c
--- a/sys/arch/alpha/alpha/interrupt.c  Thu Apr 15 00:11:09 2021 +0000
+++ b/sys/arch/alpha/alpha/interrupt.c  Thu Apr 15 00:19:52 2021 +0000
@@ -1,4 +1,4 @@
-/* $NetBSD: interrupt.c,v 1.92 2020/10/10 03:05:04 thorpej Exp $ */
+/* $NetBSD: interrupt.c,v 1.93 2021/04/15 00:19:52 rin Exp $ */
 
 /*-
  * Copyright (c) 2000, 2001 The NetBSD Foundation, Inc.
@@ -65,7 +65,7 @@
 
 #include <sys/cdefs.h>                 /* RCS ID & Copyright macro defns */
 
-__KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.92 2020/10/10 03:05:04 thorpej Exp $");
+__KERNEL_RCSID(0, "$NetBSD: interrupt.c,v 1.93 2021/04/15 00:19:52 rin Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -212,12 +212,7 @@
                break;
                
        case ALPHA_INTR_CLOCK:  /* clock interrupt */
-               /*
-                * We don't increment the interrupt depth for the
-                * clock interrupt, since it is *sampled* from
-                * the clock interrupt, so if we did, all system
-                * time would be counted as interrupt time.
-                */
+               atomic_inc_ulong(&ci->ci_intrdepth);
                sc->sc_evcnt_clock.ev_count++;
                ci->ci_data.cpu_nintr++;
                if (platform.clockintr) {
@@ -242,6 +237,7 @@
                            schedhz != 0)
                                schedclock(ci->ci_curlwp);
                }
+               atomic_dec_ulong(&ci->ci_intrdepth);
                break;
 
        case ALPHA_INTR_ERROR:  /* Machine Check or Correctable Error */