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=-3.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS autolearn=no 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 C03DCC10F29 for ; Tue, 17 Mar 2020 17:12:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7BC1F20714 for ; Tue, 17 Mar 2020 17:12:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="WOpw2DJX" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726476AbgCQRML (ORCPT ); Tue, 17 Mar 2020 13:12:11 -0400 Received: from bombadil.infradead.org ([198.137.202.133]:46226 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726779AbgCQRMD (ORCPT ); Tue, 17 Mar 2020 13:12:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Type:MIME-Version:References: Subject:Cc:To:From:Date:Message-Id:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:In-Reply-To; bh=nvk5f76qbl0HtJg1jL+4J+0+y4ARf4fTNz/qr5jKuDQ=; b=WOpw2DJXbq7v11b5E0CZc23ikO 47YU334Tj0D0C/5EqRJi1vGyvwIOpGYqesQg8xpYL0IP64znFt4bAjGOEuVt9ImQGLTgYZtA0bGiz pEViQAtegpsr3hii8sgdbQ95mqC7mYI6U6ZWLiRysCYX5HiSPxRAUuJ3WGT3B+nZ1RSXrGTdYdYQA TGLG9UEE3sZh4H4wQXuIxnZPYVRs2bgzkz6vhsCp7bGqmtce66vX0uC4ciq3BY8iAsrMhvKcPZFUE 3ZzHf4vr5p+shdSVKhwuW3rxpBwpTk0ZVq+j8EgqGCyXrAr4pPDRgklpaVmemLiQhvW5pkMi9RbPS hyhr6BGA==; Received: from j217100.upc-j.chello.nl ([24.132.217.100] helo=noisy.programming.kicks-ass.net) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jEFl0-0002rF-CT; Tue, 17 Mar 2020 17:11:58 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 1E9613073EC; Tue, 17 Mar 2020 18:11:55 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 0) id 0EC7820B16496; Tue, 17 Mar 2020 18:11:55 +0100 (CET) Message-Id: <20200317170910.592855293@infradead.org> User-Agent: quilt/0.65 Date: Tue, 17 Mar 2020 18:02:48 +0100 From: Peter Zijlstra To: tglx@linutronix.de, jpoimboe@redhat.com Cc: linux-kernel@vger.kernel.org, x86@kernel.org, peterz@infradead.org, mhiramat@kernel.org, mbenes@suse.cz, brgerst@gmail.com Subject: [PATCH v2 14/19] objtool: Delete cleanup() References: <20200317170234.897520633@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Perf shows we spend a measurable amount of time spend cleaning up right before we exit anyway. Avoid the needsless work and just terminate. This reduces objtool on vmlinux.o runtime from 5.4s to 4.8s Signed-off-by: Peter Zijlstra (Intel) --- tools/objtool/check.c | 19 ------------------- 1 file changed, 19 deletions(-) --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -2476,23 +2476,6 @@ static int validate_reachable_instructio return 0; } -static void cleanup(struct objtool_file *file) -{ - struct instruction *insn, *tmpinsn; - struct alternative *alt, *tmpalt; - - list_for_each_entry_safe(insn, tmpinsn, &file->insn_list, list) { - list_for_each_entry_safe(alt, tmpalt, &insn->alts, list) { - list_del(&alt->list); - free(alt); - } - list_del(&insn->list); - hash_del(&insn->hash); - free(insn); - } - elf_close(file->elf); -} - static struct objtool_file file; int check(const char *_objname, bool orc) @@ -2560,8 +2543,6 @@ int check(const char *_objname, bool orc } out: - cleanup(&file); - if (ret < 0) { /* * Fatal error. The binary is corrupt or otherwise broken in