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 E1ACFC433EF for ; Fri, 15 Oct 2021 03:01:01 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A69B061151 for ; Fri, 15 Oct 2021 03:01:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org A69B061151 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org 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:To:From:Reply-To:Cc:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=KzSXfdsdQBR4Ojz09sbnj85VbMFjsZCHI0eIgMVQ9/g=; b=BHDNwwNzl3j3x0 qi8It1IiN6wPdS/j/3BghOASdVOtxGoUduzoATYS376A1SHT2PWg05mQvTQMH9Rt9MUK9WOQ3IuWm 9HzuxS8bgOgi2CF4khzbQWuoRQzsWAEyBGrZXpfi5IT0gGw8/F8ePsLpCsehJ8esNzYXCH6sm4aza KVzRXszYTYvquT08RZuvX8/0+lAVX20XmCn/tKk3Yq10cRzhPWv2wg410B7p69gMTS8WFxa7G4iXl n1Cj/rVB43day3XUL34bnOWuwqQAtxm56GhioIxcK0SXFNEv7XZheI3yIzkSR6dDeOHmlPl2ygJZ9 TatjSOfEqjj7q3eqDDtw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mbDRX-005CYC-Aa; Fri, 15 Oct 2021 02:59:35 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mbDR3-005CNw-Iw for linux-arm-kernel@lists.infradead.org; Fri, 15 Oct 2021 02:59:06 +0000 Received: from x64host.home (unknown [47.187.212.181]) by linux.microsoft.com (Postfix) with ESMTPSA id 7F5A420B9D1D; Thu, 14 Oct 2021 19:59:04 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 7F5A420B9D1D DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1634266745; bh=FmJbGXiSP+JGonZTp90DkLqCm4FVOelAbFqDoqqHdv4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=jQJyeDSJfrGu1E7fZCFEcbQi17sqEQX79kndyh/soGySHlYPvUbls+j8Wpoi+UPDp 82F2nET8zGft4Qy33YxYAVyTH01LJN1BcNgYcRGh50IWqv9BbWJvspDUT3NcoCEQaV 0ICRK7MVeMFk1ZGsWjn/5Z8bHoxCRElk0jrm/0Ks= 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 v10 02/11] arm64: Make perf_callchain_kernel() use arch_stack_walk() Date: Thu, 14 Oct 2021 21:58:38 -0500 Message-Id: <20211015025847.17694-3-madvenka@linux.microsoft.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211015025847.17694-1-madvenka@linux.microsoft.com> References: <20211015025847.17694-1-madvenka@linux.microsoft.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211014_195905_654039_C7E0DB00 X-CRM114-Status: UNSURE ( 8.73 ) 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, perf_callchain_kernel() 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/perf_callchain.c | 8 ++------ 1 file changed, 2 insertions(+), 6 deletions(-) diff --git a/arch/arm64/kernel/perf_callchain.c b/arch/arm64/kernel/perf_callchain.c index 4a72c2727309..f173c448e852 100644 --- a/arch/arm64/kernel/perf_callchain.c +++ b/arch/arm64/kernel/perf_callchain.c @@ -140,22 +140,18 @@ void perf_callchain_user(struct perf_callchain_entry_ctx *entry, static bool callchain_trace(void *data, unsigned long pc) { struct perf_callchain_entry_ctx *entry = data; - perf_callchain_store(entry, pc); - return true; + return perf_callchain_store(entry, pc) == 0; } void perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs) { - struct stackframe frame; - if (perf_guest_cbs && perf_guest_cbs->is_in_guest()) { /* We don't support guest os callchain now */ return; } - start_backtrace(&frame, regs->regs[29], regs->pc); - walk_stackframe(current, &frame, callchain_trace, entry); + arch_stack_walk(callchain_trace, entry, current, regs); } unsigned long perf_instruction_pointer(struct pt_regs *regs) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel