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 X-Spam-Level: X-Spam-Status: No, score=-7.7 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6D163C04EBF for ; Tue, 4 Dec 2018 10:59:23 +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 3D5DE2146D for ; Tue, 4 Dec 2018 10:59:23 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="OhP5HyIJ"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="Hyw+1jS7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3D5DE2146D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc: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:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=xrw1itgzygwar3PJpaTiBIoKFw8Ni1hrvgr70y6BvjY=; b=OhP5HyIJxpiAUz 9RMgZEuZUM5Bhrmc2h4Pq23L3mgl5hDtNdFdOZocCveuLb3u5YgQRZw23beRthRKnjX1UxPIBs0iO kEutNiSt1PRXceZN4K9tP/Qp9AWtF3PBwZGzfb36dZBaFdtTt0IkJY5s0gzTVMR9tUOcnJ1Mv2qmx hzCnD78zlM53skhGE6iN7NISvg49MZ5KfBA2ktwpdFM6pf0zfPL3N7yuiwzMJHBXdcWt3oB6XP9WU yBzSkSxBtNmd+KIbPwExCbyQZ8Hn8zbH2R4Ow+PkppbWaqu3yjsDbOVTTB/FyhuRFrbrjjckW2tmI cT8E2+dOzSq4WH03hXdA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gU8QD-0007nt-VJ; Tue, 04 Dec 2018 10:59:21 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gU8QB-0007mr-1k for linux-arm-kernel@lists.infradead.org; Tue, 04 Dec 2018 10:59:20 +0000 Received: from localhost (5356596B.cm-6-7b.dynamic.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D3C3C20878; Tue, 4 Dec 2018 10:59:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1543921148; bh=dqMrdYDBaAcZkxFnsx1RiALqPWEHC2M0qerNBzCbwHQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Hyw+1jS7BuDLfV17y7u95HF7+t5GzPn1RjFxnGLT6g9JnncZpcVI+cFhU219y/aTl WxnnwIHcftnBSoh8J5Bs3KAob3l3xC+ru/aHflBaIqutjkMLPSJe8NQcGRDxqZrtu8 FJfO8ZJHTmAeZ5y1K1YPi6h5qxuEGjhnVKMf5cyE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Subject: [PATCH 4.19 099/139] ARM: function_graph: Simplify with function_graph_enter() Date: Tue, 4 Dec 2018 11:49:40 +0100 Message-Id: <20181204103654.523899144@linuxfoundation.org> X-Mailer: git-send-email 2.19.2 In-Reply-To: <20181204103649.950154335@linuxfoundation.org> References: <20181204103649.950154335@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181204_025919_115369_CA43FB2A X-CRM114-Status: GOOD ( 12.35 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Greg Kroah-Hartman , Russell King , stable@vger.kernel.org, "Steven Rostedt \(VMware\)" , Masami Hiramatsu , stable@kernel.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: Steven Rostedt (VMware) commit f1f5b14afd7cce39e6a9b25c685e1ea34c231096 upstream. The function_graph_enter() function does the work of calling the function graph hook function and the management of the shadow stack, simplifying the work done in the architecture dependent prepare_ftrace_return(). Have ARM use the new code, and remove the shadow stack management as well as having to set up the trace structure. This is needed to prepare for a fix of a design bug on how the curr_ret_stack is used. Cc: Russell King Cc: linux-arm-kernel@lists.infradead.org Cc: stable@kernel.org Fixes: 03274a3ffb449 ("tracing/fgraph: Adjust fgraph depth before calling trace return callback") Reviewed-by: Masami Hiramatsu Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman --- arch/arm/kernel/ftrace.c | 17 +---------------- 1 file changed, 1 insertion(+), 16 deletions(-) --- a/arch/arm/kernel/ftrace.c +++ b/arch/arm/kernel/ftrace.c @@ -227,9 +227,7 @@ void prepare_ftrace_return(unsigned long unsigned long frame_pointer) { unsigned long return_hooker = (unsigned long) &return_to_handler; - struct ftrace_graph_ent trace; unsigned long old; - int err; if (unlikely(atomic_read(¤t->tracing_graph_pause))) return; @@ -237,21 +235,8 @@ void prepare_ftrace_return(unsigned long old = *parent; *parent = return_hooker; - trace.func = self_addr; - trace.depth = current->curr_ret_stack + 1; - - /* Only trace if the calling function expects to */ - if (!ftrace_graph_entry(&trace)) { + if (function_graph_enter(old, self_addr, frame_pointer, NULL)) *parent = old; - return; - } - - err = ftrace_push_return_trace(old, self_addr, &trace.depth, - frame_pointer, NULL); - if (err == -EBUSY) { - *parent = old; - return; - } } #ifdef CONFIG_DYNAMIC_FTRACE _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel