+ s390-implement-arch_do_panic.patch added to mm-nonmm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: s390: implement arch_do_panic
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     s390-implement-arch_do_panic.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/s390-implement-arch_do_panic.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Mete Durlu <meted@linux.ibm.com>
Subject: s390: implement arch_do_panic
Date: Mon, 31 Aug 2026 11:57:16 +0200

Implement s390 specific arch_do_panic() instead of using s390 specific
ifdef sections in vpanic() code.  disabled_wait() is now called after "end
Kernel panic" marker.  No functional changes.

Link: https://lore.kernel.org/20260831-arch_do_panic-v6-2-a1e170a9e7fd@linux.ibm.com
Signed-off-by: Mete Durlu <meted@linux.ibm.com>
Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Bradley Morgan <include@grrlz.net>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Andreas Larsson <andreas@gaisler.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Petr Mladek <pmladek@suse.com>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 arch/s390/kernel/traps.c |    7 +++++++
 kernel/panic.c           |    3 ---
 2 files changed, 7 insertions(+), 3 deletions(-)

--- a/arch/s390/kernel/traps.c~s390-implement-arch_do_panic
+++ a/arch/s390/kernel/traps.c
@@ -26,6 +26,7 @@
 #include <linux/entry-common.h>
 #include <linux/kmsan.h>
 #include <linux/bug.h>
+#include <linux/panic.h>
 #include <asm/entry-percpu.h>
 #include <asm/asm-extable.h>
 #include <asm/irqflags.h>
@@ -33,6 +34,7 @@
 #include <asm/vtime.h>
 #include <asm/fpu.h>
 #include <asm/fault.h>
+#include <asm/processor.h>
 #include "entry.h"
 
 struct pgm_stat {
@@ -283,6 +285,11 @@ static void monitor_event_exception(stru
 	}
 }
 
+void arch_do_panic(void)
+{
+	disabled_wait();
+}
+
 void kernel_stack_invalid(struct pt_regs *regs)
 {
 	/*
--- a/kernel/panic.c~s390-implement-arch_do_panic
+++ a/kernel/panic.c
@@ -753,9 +753,6 @@ void vpanic(const char *fmt, va_list arg
 			 "twice on console to return to the boot prom\n");
 	}
 #endif
-#if defined(CONFIG_S390)
-	disabled_wait();
-#endif
 	pr_emerg("---[ end Kernel panic - not syncing: %s ]---\n", buf);
 
 	arch_do_panic();
_

Patches currently in -mm which might be from meted@linux.ibm.com are

panic-introduce-arch_do_panic.patch
s390-implement-arch_do_panic.patch
sparc-implement-arch_do_panic.patch