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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7E917C433EF for ; Wed, 13 Apr 2022 15:00:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=cFwSAeUq+Bf2lX51YPJV6q18TX91r0GHAoo9CuxXYRU=; b=c60rtpN4KUXQdP GJj8OHitqm7koTHquSajwDGw9VEHqebuLDARncbFcfKqCzJZheuAqfW/0KKtJ2renrlEqQmFJ/jIO g318lW3N2D9FHLNUpx4VouawfYkfgGSlu0eSkGpWLZTDExsCjl691pN3Rl4g9v2JoVGAohR/rn2X4 B3X76aLQNggFJ1ySQOHOaqPXqNWvf5EixfYgvq6pn+iNYxhqxxdXy0OEZZohOFLj5G7jkQguXn7Ia 4CAn8htHmoPaT2e0gO2j98933UEBOYesYVa1Y9578aNCmOTKQO0SHXoidx15LaCIR/qTbTz1tJuWE 9VvJCl4iWyyrR5Ge8O1A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1neeSv-001Uo5-8o; Wed, 13 Apr 2022 14:59:29 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1neeSl-001UkI-B7 for linux-arm-kernel@lists.infradead.org; Wed, 13 Apr 2022 14:59:20 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 116531596; Wed, 13 Apr 2022 07:59:18 -0700 (PDT) Received: from lakrids.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 07A103F5A1; Wed, 13 Apr 2022 07:59:16 -0700 (PDT) From: Mark Rutland To: linux-arm-kernel@lists.infradead.org Cc: broonie@kernel.org, catalin.marinas@arm.com, kaleshsingh@google.com, madvenka@linux.microsoft.com, mark.rutland@arm.com, will@kernel.org Subject: [PATCH 1/6] arm64: stacktrace: remove NULL task check from unwind_frame() Date: Wed, 13 Apr 2022 15:59:05 +0100 Message-Id: <20220413145910.3060139-2-mark.rutland@arm.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220413145910.3060139-1-mark.rutland@arm.com> References: <20220413145910.3060139-1-mark.rutland@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220413_075919_472187_97E8444D X-CRM114-Status: UNSURE ( 8.39 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "Madhavan T. Venkataraman" Currently, there is a check for a NULL task in unwind_frame(). It is not needed since all current callers pass a non-NULL task. There should be no functional change as a result of this patch. Signed-off-by: Madhavan T. Venkataraman Reviewed-by: Mark Brown Signed-off-by: Mark Rutland --- arch/arm64/kernel/stacktrace.c | 3 --- 1 file changed, 3 deletions(-) diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index e4103e085681..94932ade5c79 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -70,9 +70,6 @@ static int notrace unwind_frame(struct task_struct *tsk, unsigned long fp = frame->fp; struct stack_info info; - if (!tsk) - tsk = current; - /* Final frame; nothing to unwind */ if (fp == (unsigned long)task_pt_regs(tsk)->stackframe) return -ENOENT; -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel