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=-8.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,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 0F1D1C10F03 for ; Tue, 23 Apr 2019 19:04:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D1888208E4 for ; Tue, 23 Apr 2019 19:04:42 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="o8juCUVe" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726039AbfDWTEm (ORCPT ); Tue, 23 Apr 2019 15:04:42 -0400 Received: from mail-ed1-f67.google.com ([209.85.208.67]:42049 "EHLO mail-ed1-f67.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725975AbfDWTEm (ORCPT ); Tue, 23 Apr 2019 15:04:42 -0400 Received: by mail-ed1-f67.google.com with SMTP id u23so13321474eds.9 for ; Tue, 23 Apr 2019 12:04:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=VJwG2WkNGsxZ9VEBxT76Lze8nRHQvvb99xeSATHH6JE=; b=o8juCUVeqQ1c2DpGvMDlFQuxA4Cp1xPekbCsvkMSo9TlwtLyFMWj10wrKXyynDfUzH lsOfEHrIyINeqKsgYbKpLkoI2WS7u3JelEEuqDmubDAXdXlpj7zBi4jDh9ucolagzSvM mkd56h1Lrn9tnXAQN483sa0IplatnKA3Ugp4oPLLyHqGqeA33bdip6xDr0i8is8SfzWb kfqyA38JwYm0GkMvZvbpkF2GQD8/NjjtBhrKeZnhm/bLrX7jjrwUxwLCYv/X3X/eQyYI M2Wzx0klzpv9uwfpAPJS+B3BFIu35uHpwhTyURiPf1cmczD8KSaZthTduoUlUO5y/p9i S48A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=VJwG2WkNGsxZ9VEBxT76Lze8nRHQvvb99xeSATHH6JE=; b=P5ZAj4P6+6TOaFxHnABcHYyJalY3yESZO4+grRPeVsueKKVSSxRi5Gof+587iZGSes Sr4LkOZ4rHCqxtFOr0izCFc1wnWwvIuHpm5LdK7ayKOo15be+dvMaPjyvXf/DO4cmzvD QxfEml7NkKJHpqRIyzwGc2kANAv2O0boYwvFh8gs8k+hmfSPlHfUg5/b7I4IcwrtBByn x+vkKfYzBDcRezbF3QiEsJbHTbCDyfY0Q1lGAGUNM/YFKl+zqnh28/LjR4j/VsqIsPBX y2tT5749Cdpd3O6VORuX0O4smkqokA4RpOgCzzWl4qU1YnHm7qEdwrtf0zo+E6zNqvb7 31SA== X-Gm-Message-State: APjAAAXtK+cTgKkFV6dpwViJcFLnMgQd6Z/xDPrZaeT/vpK0JZM7rO30 qC1ftGsAd7T5l5ZaX/4xkjk= X-Google-Smtp-Source: APXvYqw/9l8J9oryijTTb/OvyxRgqax/ucXMAXoxunpNAONlrbi5LrhpYiJz25RNEXS3rqv5A9yfTw== X-Received: by 2002:a17:906:af6d:: with SMTP id os13mr14011703ejb.222.1556046280437; Tue, 23 Apr 2019 12:04:40 -0700 (PDT) Received: from localhost.localdomain ([2a01:4f9:2b:2b84::2]) by smtp.gmail.com with ESMTPSA id w40sm1202991edb.50.2019.04.23.12.04.39 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 23 Apr 2019 12:04:39 -0700 (PDT) From: Nathan Chancellor To: Greg Kroah-Hartman , Sasha Levin , stable@vger.kernel.org Cc: Nick Desaulniers , clang-built-linux@googlegroups.com, Matthias Kaehlcke , Peter Zijlstra , Masahiro Yamada , Nathan Chancellor Subject: [PATCH 4.14] Revert "kbuild: use -Oz instead of -Os when using clang" Date: Tue, 23 Apr 2019 12:04:22 -0700 Message-Id: <20190423190426.18720-2-natechancellor@gmail.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190423190426.18720-1-natechancellor@gmail.com> References: <20190423190426.18720-1-natechancellor@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Matthias Kaehlcke commit a75bb4eb9e565b9f5115e2e8c07377ce32cbe69a upstream. The clang option -Oz enables *aggressive* optimization for size, which doesn't necessarily result in smaller images, but can have negative impact on performance. Switch back to the less aggressive -Os. This reverts commit 6748cb3c299de1ffbe56733647b01dbcc398c419. Suggested-by: Peter Zijlstra Signed-off-by: Matthias Kaehlcke Reviewed-by: Nick Desaulniers Signed-off-by: Masahiro Yamada Signed-off-by: Nathan Chancellor --- Makefile | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/Makefile b/Makefile index fcfef30ca9a6..d36e66ff60aa 100644 --- a/Makefile +++ b/Makefile @@ -653,8 +653,7 @@ KBUILD_CFLAGS += $(call cc-disable-warning, int-in-bool-context) KBUILD_CFLAGS += $(call cc-disable-warning, attribute-alias) ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE -KBUILD_CFLAGS += $(call cc-option,-Oz,-Os) -KBUILD_CFLAGS += $(call cc-disable-warning,maybe-uninitialized,) +KBUILD_CFLAGS += -Os $(call cc-disable-warning,maybe-uninitialized,) else ifdef CONFIG_PROFILE_ALL_BRANCHES KBUILD_CFLAGS += -O2 $(call cc-disable-warning,maybe-uninitialized,) -- 2.21.0