From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1F82D154BF5 for ; Sun, 14 Sep 2025 00:35:42 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757810142; cv=none; b=myjVQU1ro6cJL4Fmgm5/miOoBDY9I6/Cmwk3bVKrOx5eJ0VcQU7mZ+q0wh0MFSZ9UJwEr+cPJ5MFddf4u+6RnYVqTEhdfbzCZlma29f8PVtEU3QG8TjxTqI6LRCsEVVRvfNruu9MH4QWCgNs3TuxOhplRDCmStQqpd4jJNFBoRM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1757810142; c=relaxed/simple; bh=hyyiXJaljtQpbLrmLUsY6Y3ojhZK2eJ6gC17B/40yIk=; h=Date:To:From:Subject:Message-Id; b=kNazoImwkzvjMhe6oXDt7lPpdNxGN8VYrhl/INIVn5ymYzZcqpjI/GnrbM0EzL96nsZwRpyBqVZbNJ2ycF4mGtMv3ZiIBn8VkR/xtHKisIDMY+Imp48EBb0UO5BlKxEmuTWOfMv6tr19TpefCa/YAZ6GkCtFamxVcZCBTodARHE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b=TlffIAnS; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux-foundation.org header.i=@linux-foundation.org header.b="TlffIAnS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id E13C3C4CEEB; Sun, 14 Sep 2025 00:35:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1757810142; bh=hyyiXJaljtQpbLrmLUsY6Y3ojhZK2eJ6gC17B/40yIk=; h=Date:To:From:Subject:From; b=TlffIAnSnMXullJESXzNEd14If6wf/OJ4XXGzV5cHdwDCJFy16XycYdmZeAcMiDml VJgbZ7Fdb3+WeRTI0lZb/fAH5I2XTeMoHjgiQrJbprte6ALORXuNSAEQVnKsD2wIwg 5SA757CJbBqWSgBAwzM4sZl6/b/b0/YVRpXmyJkU= Date: Sat, 13 Sep 2025 17:35:41 -0700 To: mm-commits@vger.kernel.org,yury.norov@gmail.com,yangyicong@hisilicon.com,ville.syrjala@linux.intel.com,vgoyal@redhat.com,tzimmermann@suse.de,tony.luck@intel.com,tj@kernel.org,thorsten.blum@linux.dev,tglx@linutronix.de,sohil.mehta@intel.com,senozhatsky@chromium.org,rostedt@goodmis.org,qianqiang.liu@163.com,pmladek@suse.com,oushixiong@kylinos.cn,namcao@linutronix.de,mingo@kernel.org,max.kellermann@ionos.com,luogengkun@huaweicloud.com,lihuafei1@huawei.com,kees@kernel.org,Jonathan.Cameron@huawei.com,john.ogness@linutronix.de,joel.granados@kernel.org,jgg@ziepe.ca,gpiccoli@igalia.com,dyoung@redhat.com,djwong@kernel.org,dianders@chromium.org,deller@gmx.de,cuiyunhui@bytedance.com,bhe@redhat.com,anna.schumaker@oracle.com,wangjinchao600@gmail.com,akpm@linux-foundation.org From: Andrew Morton Subject: [merged mm-nonmm-stable] panic-use-panic_try_start-in-vpanic.patch removed from -mm tree Message-Id: <20250914003541.E13C3C4CEEB@smtp.kernel.org> Precedence: bulk X-Mailing-List: mm-commits@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: The quilt patch titled Subject: panic: use panic_try_start() in vpanic() has been removed from the -mm tree. Its filename was panic-use-panic_try_start-in-vpanic.patch This patch was dropped because it was merged into the mm-nonmm-stable branch of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm ------------------------------------------------------ From: Jinchao Wang Subject: panic: use panic_try_start() in vpanic() Date: Mon, 25 Aug 2025 10:29:33 +0800 vpanic() had open-coded logic to claim panic_cpu with atomic_try_cmpxchg. This is already handled by panic_try_start(). Switch to panic_try_start() and use panic_on_other_cpu() for the fallback path. This removes duplicate code and makes panic handling consistent across functions. Link: https://lkml.kernel.org/r/20250825022947.1596226-6-wangjinchao600@gmail.com Signed-off-by: Jinchao Wang Cc: Anna Schumaker Cc: Baoquan He Cc: "Darrick J. Wong" Cc: Dave Young Cc: Doug Anderson Cc: "Guilherme G. Piccoli" Cc: Helge Deller Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Joanthan Cameron Cc: Joel Granados Cc: John Ogness Cc: Kees Cook Cc: Li Huafei Cc: "Luck, Tony" Cc: Luo Gengkun Cc: Max Kellermann Cc: Nam Cao Cc: oushixiong Cc: Petr Mladek Cc: Qianqiang Liu Cc: Sergey Senozhatsky Cc: Sohil Mehta Cc: Steven Rostedt Cc: Tejun Heo Cc: Thomas Gleinxer Cc: Thomas Zimemrmann Cc: Thorsten Blum Cc: Ville Syrjala Cc: Vivek Goyal Cc: Yicong Yang Cc: Yunhui Cui Cc: Yury Norov (NVIDIA) Signed-off-by: Andrew Morton --- kernel/panic.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) --- a/kernel/panic.c~panic-use-panic_try_start-in-vpanic +++ a/kernel/panic.c @@ -420,7 +420,6 @@ void vpanic(const char *fmt, va_list arg static char buf[1024]; long i, i_next = 0, len; int state = 0; - int old_cpu, this_cpu; bool _crash_kexec_post_notifiers = crash_kexec_post_notifiers; if (panic_on_warn) { @@ -457,13 +456,10 @@ void vpanic(const char *fmt, va_list arg * `old_cpu == this_cpu' means we came from nmi_panic() which sets * panic_cpu to this CPU. In this case, this is also the 1st CPU. */ - old_cpu = PANIC_CPU_INVALID; - this_cpu = raw_smp_processor_id(); - /* atomic_try_cmpxchg updates old_cpu on failure */ - if (atomic_try_cmpxchg(&panic_cpu, &old_cpu, this_cpu)) { + if (panic_try_start()) { /* go ahead */ - } else if (old_cpu != this_cpu) + } else if (panic_on_other_cpu()) panic_smp_self_stop(); console_verbose(); _ Patches currently in -mm which might be from wangjinchao600@gmail.com are