From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 97D2DC4332F for ; Fri, 15 Oct 2021 02:35:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7B58861039 for ; Fri, 15 Oct 2021 02:35:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235098AbhJOChF (ORCPT ); Thu, 14 Oct 2021 22:37:05 -0400 Received: from linux.microsoft.com ([13.77.154.182]:55460 "EHLO linux.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235105AbhJOChE (ORCPT ); Thu, 14 Oct 2021 22:37:04 -0400 Received: from x64host.home (unknown [47.187.212.181]) by linux.microsoft.com (Postfix) with ESMTPSA id 6FC9420B9D22; Thu, 14 Oct 2021 19:34:57 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 6FC9420B9D22 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1634265298; bh=qZScEFTO+pORG9YKmb/gJbPlBbD1pvru4NrU3/YAom4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=fPITtNCJx1AiyMyMCIsYoQM+nzWbH6BwA3I2FM3/ckjWOdtTOfl2VmSkZKZgDZCpG 4FJkaRCfQMXmgBGF74uIlUh6Pw+U0iMGs9a5d//ARcfsgvSL5EscbhKxWdo335GpKt QSDnf+p7GwD71W+nzufJ69xTWYaL4ZlOseUHBWlU= From: madvenka@linux.microsoft.com To: mark.rutland@arm.com, broonie@kernel.org, jpoimboe@redhat.com, ardb@kernel.org, nobuta.keiya@fujitsu.com, sjitindarsingh@gmail.com, catalin.marinas@arm.com, will@kernel.org, jmorris@namei.org, linux-arm-kernel@lists.infradead.org, live-patching@vger.kernel.org, linux-kernel@vger.kernel.org, madvenka@linux.microsoft.com Subject: [PATCH v9 04/11] arm64: Make return_address() use arch_stack_walk() Date: Thu, 14 Oct 2021 21:34:08 -0500 Message-Id: <20211015023413.16614-7-madvenka@linux.microsoft.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211015023413.16614-1-madvenka@linux.microsoft.com> References: <20211015023413.16614-1-madvenka@linux.microsoft.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: live-patching@vger.kernel.org From: "Madhavan T. Venkataraman" Currently, return_address() in ARM64 code walks the stack using start_backtrace() and walk_stackframe(). Make it use arch_stack_walk() instead. This makes maintenance easier. Signed-off-by: Madhavan T. Venkataraman --- arch/arm64/kernel/return_address.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/arch/arm64/kernel/return_address.c b/arch/arm64/kernel/return_address.c index a6d18755652f..92a0f4d434e4 100644 --- a/arch/arm64/kernel/return_address.c +++ b/arch/arm64/kernel/return_address.c @@ -35,15 +35,11 @@ NOKPROBE_SYMBOL(save_return_addr); void *return_address(unsigned int level) { struct return_address_data data; - struct stackframe frame; data.level = level + 2; data.addr = NULL; - start_backtrace(&frame, - (unsigned long)__builtin_frame_address(0), - (unsigned long)return_address); - walk_stackframe(current, &frame, save_return_addr, &data); + arch_stack_walk(save_return_addr, &data, current, NULL); if (!data.level) return data.addr; -- 2.25.1