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 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-s390@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: <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. 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=PPc/P/qC c=1 sm=1 tr=0 ts=6a955005 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==: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-GUID: QjRJ6TAcTuxZ-UHNclo6fpuh7orvpax0 X-Proofpoint-ORIG-GUID: QjRJ6TAcTuxZ-UHNclo6fpuh7orvpax0 X-Proofpoint-Spam-Info: AW1haW4tMjYwODMxMDA4MiBTYWx0ZWRfX7oVg+dWNpXOX yLqIYfz3U0SKMksN7pcw43w8N/TvLj1ucV9jng1zPBSb8VGXhbslUFzA6ydsz6pU6w0LHqz+dFa 6X+Zx2CNWkuBbHkKPJDVRUFw13c1UJg= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODMxMDA4MiBTYWx0ZWRfXzTA52SrYF5Xj 8tmatHWwz0N312NzCHGDKio2v90rXL+zCxh1fq+Ki3YQdIaWpylfMGTS9hUnICD0mNCEeo64Zhs uwcljRAViY24NuXtyiY7Mvo9auL3KCIUlR1iKBeiopl1wLfxSDLhEoCw8C7XBhxE6nncEL3lPWo LfE26qTavmddX4dp+7w69iWYSjCdAy/lS2zwtHw0Ip7I06RAZ5L7PmAP2tj/c5rgvOGKrpUwRFK gBYSAcxqTaKzWf5hIFzc2Cy/JRQj27bYpqzvPNuNRkWHChFG+UvscnCIEUBvEPqkPtxh/cVbC3O IWiVjO5nYtVD+sX6bqzkxwvhRt4VNqh3DDaT/j64UHUxdOQyBiFB3vrfIXiCCvcQ2O8byL0n1h3 fJRyqirtzkCT1Saf3Max3alIOVZaYMnM8nY7hc2aykNwsVGWlOuh1Ei1ZQpbo3th+ucGYa7oOa3 vvToMPBDbjKYOwhmRWQ== 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=2026-08-31_03,2026-08-27_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 adultscore=0 suspectscore=0 bulkscore=0 spamscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608310082 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