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 AC1239461 for ; Thu, 10 Jul 2025 00:32:31 +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=1752107551; cv=none; b=KZSvSyjHzEqrMJfv3SONaxh2pfDGl9RpbeAA3cbpFLfA7UMxY9StoKqWM93KiaYB3EtyYWuRt5oWHJp88GxX7nzVV6fM0pC71HoITMiRDqPVEXvwTxRNMW51NjhTaOwTFA/Q97eW5eGKQfNmPaLLiVUUTHrmiyPzjGcIJZftDNc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1752107551; c=relaxed/simple; bh=lhMjg7Q3KKmBFsx5QTcDfSesOJ5ulW9KuZmBI84FTvo=; h=Message-ID:Date:From:To:Cc:Subject:References:MIME-Version: Content-Type; b=ipNjsJ2OQUTGXiRYXSmpvPpeOwufnf5pNKk0G3KgxgVZJH5q9cHsgIHxwYCJjP+EMK+DcL5M8woXw2N+j8XE3vBbkfU74IdYi3YJiAPmRgEfOgSks1gvxhUhwjqcGAyhxPi/L938+6dMxwmUyD+dsxjpN9vPFszi3mvE/KtS0n4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=kA4ynyZ7; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="kA4ynyZ7" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5FB74C4CEF6; Thu, 10 Jul 2025 00:32:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752107551; bh=lhMjg7Q3KKmBFsx5QTcDfSesOJ5ulW9KuZmBI84FTvo=; h=Date:From:To:Cc:Subject:References:From; b=kA4ynyZ7Ck6EPlGBC7Ev0Jru4GFCrlArpyuFS7DMkOG4nYZnzHMTHshZn9AGzT28e ulBuBYYYmvJh8jycth/ZPsbmI5SO84S+KhbOvz5KZehkphIGhAUCLL+EVfmmUp+Cj0 x4fW9iAtlOHH6habEDcc9bAR2SoTkYxlGaNp8N+wYUQwgYY98CYpLmiFdpfrAYibqa WnzLveXSxy7lDsLljptoZfvCdzdhx6KUqfQN5hi6Z+YQQAq2EoqfwujlWLtdsotVej c9jC4cxf5Yhm4HsYbQfsELhYewapzMATEVFJeBd/lJmWTa8R7H4v2zHfyHigDudEA2 WLugU1o8R2Y0Q== Received: from rostedt by gandalf with local (Exim 4.98.2) (envelope-from ) id 1uZfDI-00000001WOm-03os; Wed, 09 Jul 2025 20:32:36 -0400 Message-ID: <20250710003235.868462961@kernel.org> User-Agent: quilt/0.68 Date: Wed, 09 Jul 2025 20:31:59 -0400 From: Steven Rostedt To: linux-kernel@vger.kernel.org Cc: Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Nam Cao , Petr Mladek Subject: [for-next][PATCH 03/12] panic: Add vpanic() References: <20250710003156.209859354@kernel.org> 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 From: Nam Cao vpanic() is useful for implementing runtime verification reactors. Add it. Signed-off-by: Nam Cao Reviewed-by: Petr Mladek Signed-off-by: Steven Rostedt (Google) --- include/linux/panic.h | 3 +++ kernel/panic.c | 16 ++++++++++++---- 2 files changed, 15 insertions(+), 4 deletions(-) diff --git a/include/linux/panic.h b/include/linux/panic.h index 4adc65766935..0332c6d6771f 100644 --- a/include/linux/panic.h +++ b/include/linux/panic.h @@ -3,6 +3,7 @@ #define _LINUX_PANIC_H #include +#include #include struct pt_regs; @@ -10,6 +11,8 @@ struct pt_regs; extern long (*panic_blink)(int state); __printf(1, 2) void panic(const char *fmt, ...) __noreturn __cold; +__printf(1, 0) +void vpanic(const char *fmt, va_list args) __noreturn __cold; void nmi_panic(struct pt_regs *regs, const char *msg); void check_panic_on_warn(const char *origin); extern void oops_enter(void); diff --git a/kernel/panic.c b/kernel/panic.c index b0b9a8bf4560..6a1823c383d0 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -309,13 +309,13 @@ static void panic_other_cpus_shutdown(bool crash_kexec) /** * panic - halt the system * @fmt: The text string to print + * @args: Arguments for the format string * * Display a message, then perform cleanups. This function never returns. */ -void panic(const char *fmt, ...) +void vpanic(const char *fmt, va_list args) { static char buf[1024]; - va_list args; long i, i_next = 0, len; int state = 0; int old_cpu, this_cpu; @@ -366,9 +366,7 @@ void panic(const char *fmt, ...) console_verbose(); bust_spinlocks(1); - va_start(args, fmt); len = vscnprintf(buf, sizeof(buf), fmt, args); - va_end(args); if (len && buf[len - 1] == '\n') buf[len - 1] = '\0'; @@ -505,7 +503,17 @@ void panic(const char *fmt, ...) mdelay(PANIC_TIMER_STEP); } } +EXPORT_SYMBOL(vpanic); +/* Identical to vpanic(), except it takes variadic arguments instead of va_list */ +void panic(const char *fmt, ...) +{ + va_list args; + + va_start(args, fmt); + vpanic(fmt, args); + va_end(args); +} EXPORT_SYMBOL(panic); #define TAINT_FLAG(taint, _c_true, _c_false, _module) \ -- 2.47.2