From nobody Sat Sep 26 19:35:33 2026 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1559C3DAAB1; Mon, 31 Aug 2026 09:57:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788170266; cv=none; b=NdvGffhtOXBYtHXHqeQFzsGjl2wVMCJrtydlS4S8+WyLadsAn0p4MRH2Jjc3+CiBmqiTn6nuE55te4VDTO3y/JpqHbeIO04rq0C/+35k5PWjbWSyNfswILgc3ztkfV6M5nr9sYF7aF6j3D32HihLBjWDGDYzDU0HkYB3UVpQQik= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788170266; c=relaxed/simple; bh=PYF3iNeENBdSaiAGyN6wQYwEL8sItA6lmOBg8rYNCMk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=UspLyr1TzBEif4QUKsb9cNR161EtEUxU3xO12OIASEPBrNxmi507B/OBlNse5KGWYxQ8Nt5QRhTUyofnGStl395oJNucJYBM5ccobglqxv7GHsuexTJZx1MQH+ov7LLdUpgCHaHhDtDuXJDIT5cXd1nGTjdon0wpUFKU3okScOI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=cwX0+avZ; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="cwX0+avZ" Received: from pps.filterd (m0360083.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 67V825M61640122; Mon, 31 Aug 2026 09:57:26 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=YgwZSW C2bLmMyDbaQo4SVNBWV5SCX4gDWVO4DIJgLiM=; b=cwX0+avZQTsCBcNHVhOKjI QUwJUqlG95ZFoPKTsdMcWgqnD0VJdWo9mSKI8wKWv+vLFiPjIBfh0Yc0Ef5BsH5R flt9WnXnXFoFWacNfRt16f0CU6AHyRyi4lqWeoHMN+gOB8Kmev75Ow40sNI+2jow FPCcTGUlL7f1cN66FBdym6V++xgvuRsqTBVbLZboI+FNqILjrYnvvgrZ87Mu2yu6 1Jhp3hmUYdLRaa9K3RU5nuxuOvv0k00M3YJqBGFuq7k1Ulq5bWjvMssnvxcBaDl8 l52amKeFcZGrYbgC27+dt78x/YSziJ0YdWFUqJ/qyYAyyLkfrAEmFhsxGBLUN0iA == Received: from ppma21.wdc07v.mail.ibm.com (5b.69.3da9.ip4.static.sl-reverse.com [169.61.105.91]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4gbpx58grb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Aug 2026 09:57:25 +0000 (GMT) Received: from pps.filterd (ppma21.wdc07v.mail.ibm.com [127.0.0.1]) by ppma21.wdc07v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 67V9uHKp027297; Mon, 31 Aug 2026 09:57:24 GMT Received: from smtprelay03.fra02v.mail.ibm.com ([9.218.2.224]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4gcarjw76g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 31 Aug 2026 09:57:24 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (smtpav05.fra02v.mail.ibm.com [10.20.54.104]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 67V9vKhh45679056 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 31 Aug 2026 09:57:20 GMT Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9B69920040; Mon, 31 Aug 2026 09:57:20 +0000 (GMT) Received: from smtpav05.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 32BA32004B; Mon, 31 Aug 2026 09:57:20 +0000 (GMT) Received: from [192.168.2.169] (unknown [9.87.144.92]) by smtpav05.fra02v.mail.ibm.com (Postfix) with ESMTP; Mon, 31 Aug 2026 09:57:20 +0000 (GMT) From: Mete Durlu Date: Mon, 31 Aug 2026 11:57:15 +0200 Subject: [PATCH v6 1/3] panic: Introduce arch_do_panic Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260831-arch_do_panic-v6-1-a1e170a9e7fd@linux.ibm.com> References: <20260831-arch_do_panic-v6-0-a1e170a9e7fd@linux.ibm.com> In-Reply-To: <20260831-arch_do_panic-v6-0-a1e170a9e7fd@linux.ibm.com> To: Andrew Morton , Petr Mladek , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , "David S. 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Pave the way for vpanic() cleanup. Reviewed-by: Bradley Morgan Suggested-by: Sven Schnelle Signed-off-by: Mete Durlu --- include/linux/panic.h | 2 ++ kernel/panic.c | 3 +++ 2 files changed, 5 insertions(+) diff --git a/include/linux/panic.h b/include/linux/panic.h index f1dd417e54b2..98dd7dfd27de 100644 --- a/include/linux/panic.h +++ b/include/linux/panic.h @@ -110,4 +110,6 @@ extern void add_taint(unsigned flag, enum lockdep_ok); extern int test_taint(unsigned flag); extern unsigned long get_taint(void); =20 +void arch_do_panic(void); + #endif /* _LINUX_PANIC_H */ diff --git a/kernel/panic.c b/kernel/panic.c index 213725b612aa..726a97842232 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -567,6 +567,8 @@ static void panic_other_cpus_shutdown(bool crash_kexec) crash_smp_send_stop(); } =20 +void __weak arch_do_panic(void) {} + /** * vpanic - halt the system * @fmt: The text string to print @@ -756,6 +758,7 @@ void vpanic(const char *fmt, va_list args) #endif pr_emerg("---[ end Kernel panic - not syncing: %s ]---\n", buf); 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No functional changes. Acked-by: Heiko Carstens Reviewed-by: Bradley Morgan Signed-off-by: Mete Durlu --- arch/s390/kernel/traps.c | 7 +++++++ kernel/panic.c | 3 --- 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index b6ba4465f59d..115cb3373247 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include #include @@ -33,6 +34,7 @@ #include #include #include +#include #include "entry.h" =20 struct pgm_stat { @@ -283,6 +285,11 @@ static void monitor_event_exception(struct pt_regs *re= gs) } } =20 +void arch_do_panic(void) +{ + disabled_wait(); +} + void kernel_stack_invalid(struct pt_regs *regs) { /* diff --git a/kernel/panic.c b/kernel/panic.c index 726a97842232..ee6e3f9e3900 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -752,9 +752,6 @@ void vpanic(const char *fmt, va_list args) pr_emerg("Press Stop-A (L1-A) from sun keyboard or send break\n" "twice on console to return to the boot prom\n"); 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charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260831-arch_do_panic-v6-3-a1e170a9e7fd@linux.ibm.com> References: <20260831-arch_do_panic-v6-0-a1e170a9e7fd@linux.ibm.com> In-Reply-To: <20260831-arch_do_panic-v6-0-a1e170a9e7fd@linux.ibm.com> To: Andrew Morton , Petr Mladek , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , "David S. 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Reorder arch specific panic handling, sparc's Stop-A messages are now printed after "end Kernel panic" marker. Reviewed-by: Bradley Morgan Signed-off-by: Mete Durlu --- arch/sparc/kernel/setup.c | 9 +++++++++ kernel/panic.c | 9 --------- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/arch/sparc/kernel/setup.c b/arch/sparc/kernel/setup.c index 4975867d9001..5f43cef80638 100644 --- a/arch/sparc/kernel/setup.c +++ b/arch/sparc/kernel/setup.c @@ -2,6 +2,8 @@ =20 #include #include +#include +#include =20 static const struct ctl_table sparc_sysctl_table[] =3D { { @@ -36,6 +38,13 @@ static const struct ctl_table sparc_sysctl_table[] =3D { #endif }; =20 +void arch_do_panic(void) +{ + /* Make sure the user can actually press Stop-A (L1-A) */ + stop_a_enabled =3D 1; + pr_emerg("Press Stop-A (L1-A) from sun keyboard or send break\n" + "twice on console to return to the boot prom\n"); +} =20 static int __init init_sparc_sysctls(void) { diff --git a/kernel/panic.c b/kernel/panic.c index ee6e3f9e3900..7dda841c16f9 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -744,15 +744,6 @@ void vpanic(const char *fmt, va_list args) reboot_mode =3D panic_reboot_mode; emergency_restart(); } -#ifdef __sparc__ - { - extern int stop_a_enabled; - /* Make sure the user can actually press Stop-A (L1-A) */ - stop_a_enabled =3D 1; - pr_emerg("Press Stop-A (L1-A) from sun keyboard or send break\n" - "twice on console to return to the boot prom\n"); - } -#endif pr_emerg("---[ end Kernel panic - not syncing: %s ]---\n", buf); =20 arch_do_panic(); --=20 2.55.0