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=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=unavailable 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 7C074ECE58D for ; Mon, 7 Oct 2019 08:17:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5BC5A21655 for ; Mon, 7 Oct 2019 08:17:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727516AbfJGIRU (ORCPT ); Mon, 7 Oct 2019 04:17:20 -0400 Received: from mx2.suse.de ([195.135.220.15]:56290 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727448AbfJGIRU (ORCPT ); Mon, 7 Oct 2019 04:17:20 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 82668AE8D; Mon, 7 Oct 2019 08:17:18 +0000 (UTC) From: Miroslav Benes To: rostedt@goodmis.org, mingo@redhat.com, jpoimboe@redhat.com, jikos@kernel.org, pmladek@suse.com, joe.lawrence@redhat.com Cc: linux-kernel@vger.kernel.org, live-patching@vger.kernel.org, Miroslav Benes Subject: [PATCH 3/3] livepatch: Use FTRACE_OPS_FL_PERMANENT Date: Mon, 7 Oct 2019 10:17:14 +0200 Message-Id: <20191007081714.20259-4-mbenes@suse.cz> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191007081714.20259-1-mbenes@suse.cz> References: <20191007081714.20259-1-mbenes@suse.cz> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: live-patching-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: live-patching@vger.kernel.org Use FTRACE_OPS_FL_PERMANENT flag to be immune to toggling the 'ftrace_enabled' sysctl knob. Signed-off-by: Miroslav Benes --- kernel/livepatch/patch.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/kernel/livepatch/patch.c b/kernel/livepatch/patch.c index bd43537702bd..b552cf2d85f8 100644 --- a/kernel/livepatch/patch.c +++ b/kernel/livepatch/patch.c @@ -196,7 +196,8 @@ static int klp_patch_func(struct klp_func *func) ops->fops.func = klp_ftrace_handler; ops->fops.flags = FTRACE_OPS_FL_SAVE_REGS | FTRACE_OPS_FL_DYNAMIC | - FTRACE_OPS_FL_IPMODIFY; + FTRACE_OPS_FL_IPMODIFY | + FTRACE_OPS_FL_PERMANENT; list_add(&ops->node, &klp_ops); -- 2.23.0