From mboxrd@z Thu Jan 1 00:00:00 1970 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 6DF2E3F8EB3; Wed, 5 Aug 2026 09:49:19 +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=1785923360; cv=none; b=FGlt5R3MqlZFUu3vz8GwxtajIrxRpiCA9mlRs6Lmm7g6bsly8f3qO6DoPDDreEwl7G5yDIHWxuLyhH8/BMlhSs05MUS8BCYhA/k2ULKHPF44VKyrIl4O4Jd45NafL9fkniQb+DTo/sSr8XlVD/itP0XPKrRlGY4QzySSEBUFCBs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785923360; c=relaxed/simple; bh=PYF3iNeENBdSaiAGyN6wQYwEL8sItA6lmOBg8rYNCMk=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=qhdT1ZsfhBMyELZWE4YsNw400JGpAh2N3zHk0C78jsYY627TRDmZOLFQxyDImaapNwrzcGANYSmvEs3m9Dq3UOZiEzT5pa6GHqAxDMVM+O8NSMTM2cCVdUi6rySY8p3yoA4KV+zeDiBKwzyAO6/JDmjSgSKqHYdy1vWMVIM+iWo= 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=cfeXndAD; 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="cfeXndAD" 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 6758liJ63354587; Wed, 5 Aug 2026 09:49:04 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=cfeXndAD9DEnWCUja2qZbP /hI5fez+zEsytB3q9p0uFDrH4HXqiNd4b1ZTpi5N3IlwQh3ub+XdP4CYqnnFG5SX Q1iPn1eR8Ne9oBXSmfukBeduOdPjT2r+0ocNYATTOPtnYLAgSmov4E1ZWI4Zghs8 TL6jLsSXc01VK0r9cVO44xqSGewmjF5jBuZhkzcYpES9ixg1IhCKjeIJKOC4VwH6 RqV/v1zvEgEeogcC8ZMv3JiJRVD7G2tG5MkQVf4P1cL0mzv0djp8OL3K1GQHXBXO mW4234MQG4fq4vb3nm9PeGatXN0hv+PY3GmCTWKdMYtVgRUd9+z27Jw+eTkUXd8A == Received: from ppma22.wdc07v.mail.ibm.com (5c.69.3da9.ip4.static.sl-reverse.com [169.61.105.92]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4fs8a42drv-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 05 Aug 2026 09:49:04 +0000 (GMT) Received: from pps.filterd (ppma22.wdc07v.mail.ibm.com [127.0.0.1]) by ppma22.wdc07v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 6759fLJm014396; Wed, 5 Aug 2026 09:49:03 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma22.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4fsugw63br-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 05 Aug 2026 09:49:03 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 6759mxwb15532414 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 5 Aug 2026 09:48:59 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0F5712004D; Wed, 5 Aug 2026 09:48:59 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id D0A6D2004E; Wed, 5 Aug 2026 09:48:58 +0000 (GMT) Received: from [9.224.76.67] (unknown [9.224.76.67]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTP; Wed, 5 Aug 2026 09:48:58 +0000 (GMT) From: Mete Durlu Date: Wed, 05 Aug 2026 11:48:36 +0200 Subject: [PATCH v4 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: 7bit Message-Id: <20260805-arch_do_panic-v4-1-af4a36f99414@linux.ibm.com> References: <20260805-arch_do_panic-v4-0-af4a36f99414@linux.ibm.com> In-Reply-To: <20260805-arch_do_panic-v4-0-af4a36f99414@linux.ibm.com> To: Andrew Morton , Petr Mladek , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , "David S. Miller" , Andreas Larsson , Bradley Morgan Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org, sparclinux@vger.kernel.org, Mete Durlu X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=E6P9Y6dl c=1 sm=1 tr=0 ts=6a730710 cx=c_pps a=5BHTudwdYE3Te8bg5FgnPg==:117 a=5BHTudwdYE3Te8bg5FgnPg==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=jcFIXsoQAAAA:8 a=VnNF1IyMAAAA:8 a=vDqFKWyYXM9dIk6-_9sA:9 a=QEXdDO2ut3YA:10 a=M1-Q_cRM6PFdmZSamPpU:22 X-Proofpoint-ORIG-GUID: cLFMVufzigXiBUXx_BofWknMvIaIss0S X-Proofpoint-GUID: cLFMVufzigXiBUXx_BofWknMvIaIss0S X-Proofpoint-Spam-Info: AW1haW4tMjYwODA1MDA3NyBTYWx0ZWRfX+M+VvqfWJuaf EkIL9zziTDnLwLjxlxUhFpQKvEjCIBsPmMMzWokDc/fP13iF2azQIrQCuZ3VpQLrMKt8GPcemj0 R9J7/0DceiP2Aop3EczJ3e0mTdMdsdw= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODA1MDA3NyBTYWx0ZWRfX8u4S6BdhrSV/ FJPN2ImdFZGWhtCXkKjquajMgnvfvowR3X1KzVTes2NMTDDHbcZwBWAzsmtvncNcbtsFKnfcqR0 Sd6JC/sVbls63jkcifnSyueb/+BveFfAOkhKKn/X8dv6KlFp0/J64ALnzCXfY99WN6RPVix/CQk iA3h0OUQPRNqQTN+j+KEXg+SiO7SDI4711IstrZwXBAuQ1Mj53+kMioXpKOYV7tR2F9j8O8Y+vh 3w6mTXTtdbTtJEL9+EFjt+pbB/6oFDS0tKVqsjEr13cqkGynqNAzPyCOe6WbpbZ8CottbDfP403 e2qQH9SZza1k/6aczejlH9FIZPldGRu8CoPInVCujELdbVvaCQU3r6BO0v2zX/hqKc3mmGg6XGN 5h18PsDUR7t2RUDyY85zEoIuTVwYlRJhiT330bbs9x6WLalzK7/cNsnjERT3Uq9vwXX1h2t7PUS ZcFbzF8TGjjIf6hOFIA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-05_03,2026-08-04_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 priorityscore=1501 suspectscore=0 adultscore=0 spamscore=0 malwarescore=0 impostorscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608050077 Introduce a hook for architectures to put their specific panic handlers. s390 and sparc already has ifdef preprocessor checks to execute architecture specific code. 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); +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(); } +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); + arch_do_panic(); /* Do not scroll important messages printed above */ suppress_printk = 1; -- 2.55.0