From patchwork Sat Nov 21 19:43:39 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Masahiro Yamada X-Patchwork-Id: 11923621 X-Patchwork-Delegate: kuba@kernel.org 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=-17.0 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI, 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 6A7DEC388F9 for ; Sat, 21 Nov 2020 19:53:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 2AF6A221FC for ; Sat, 21 Nov 2020 19:53:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nifty.com header.i=@nifty.com header.b="Ed4YR6jC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728517AbgKUTxg (ORCPT ); Sat, 21 Nov 2020 14:53:36 -0500 Received: from condef-02.nifty.com ([202.248.20.67]:51719 "EHLO condef-02.nifty.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728501AbgKUTxf (ORCPT ); Sat, 21 Nov 2020 14:53:35 -0500 X-Greylist: delayed 398 seconds by postgrey-1.27 at vger.kernel.org; Sat, 21 Nov 2020 14:53:34 EST Received: from conuserg-07.nifty.com ([10.126.8.70])by condef-02.nifty.com with ESMTP id 0ALJiGEX025043; Sun, 22 Nov 2020 04:44:43 +0900 Received: from grover.flets-west.jp (softbank126090211135.bbtec.net [126.90.211.135]) (authenticated) by conuserg-07.nifty.com with ESMTP id 0ALJhlQW018082; Sun, 22 Nov 2020 04:43:48 +0900 DKIM-Filter: OpenDKIM Filter v2.10.3 conuserg-07.nifty.com 0ALJhlQW018082 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nifty.com; s=dec2015msa; t=1605987828; bh=kMMLEunEMIDisWEYWqEwz2gIWOM0bj/iT9P6aQkYuAA=; h=From:To:Cc:Subject:Date:From; b=Ed4YR6jCsEtGEDLmMjHzJsPekt449R4rvo+kLcDiqhConMsBK7GnZj47QGbL9Zfvz F7JN4vuT9U42wImHJxZC+JkSuW358QGOQsiIWcKKZt0X5K85iY4qxq4urVA3MoG+dJ HdGOZZ9UcddBdtjwbgdME9cB6bRr9PPT0YA3ZgBqxHvync6gU9yfgKSoCXMC2O6bP5 E5JpIg82ZiGWVerVt3xqwloF+WbkRVv6L5JjdF38neunrDIRCBP34+JIuLX3KARh2+ gpLzk4lSZFr22g9gqJGBDP1+T6Jz7yNfHWOCtfFIqtyA3Z3LpAWQWN7nt/nJuhj0TL h8TjAVnBvm7AA== X-Nifty-SrcIP: [126.90.211.135] From: Masahiro Yamada To: Miguel Ojeda Cc: Masahiro Yamada , "Jason A. Donenfeld" , Shuah Khan , linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, netdev@vger.kernel.org, wireguard@lists.zx2c4.com Subject: [PATCH] compiler_attribute: remove CONFIG_ENABLE_MUST_CHECK Date: Sun, 22 Nov 2020 04:43:39 +0900 Message-Id: <20201121194339.52290-1-masahiroy@kernel.org> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Revert commit cebc04ba9aeb ("add CONFIG_ENABLE_MUST_CHECK"). A lot of warn_unused_result warnings existed in 2006, but until now they have been fixed thanks to people doing allmodconfig tests. Our goal is to always enable __must_check where appreciate, so this CONFIG option is no longer needed. I see a lot of defconfig (arch/*/configs/*_defconfig) files having: # CONFIG_ENABLE_MUST_CHECK is not set I did not touch them for now since it would be a big churn. If arch maintainers want to clean them up, please go ahead. Signed-off-by: Masahiro Yamada --- include/linux/compiler_types.h | 4 ---- lib/Kconfig.debug | 8 -------- tools/testing/selftests/wireguard/qemu/debug.config | 1 - 3 files changed, 13 deletions(-) diff --git a/include/linux/compiler_types.h b/include/linux/compiler_types.h index ac3fa37a84f9..02f6d3fbad9d 100644 --- a/include/linux/compiler_types.h +++ b/include/linux/compiler_types.h @@ -110,11 +110,7 @@ struct ftrace_likely_data { unsigned long constant; }; -#ifdef CONFIG_ENABLE_MUST_CHECK #define __must_check __attribute__((__warn_unused_result__)) -#else -#define __must_check -#endif #if defined(CC_USING_HOTPATCH) #define notrace __attribute__((hotpatch(0, 0))) diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index c789b39ed527..cb8ef4fd0d02 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -286,14 +286,6 @@ config GDB_SCRIPTS endif # DEBUG_INFO -config ENABLE_MUST_CHECK - bool "Enable __must_check logic" - default y - help - Enable the __must_check logic in the kernel build. Disable this to - suppress the "warning: ignoring return value of 'foo', declared with - attribute warn_unused_result" messages. - config FRAME_WARN int "Warn for stack frames larger than" range 0 8192 diff --git a/tools/testing/selftests/wireguard/qemu/debug.config b/tools/testing/selftests/wireguard/qemu/debug.config index b50c2085c1ac..fe07d97df9fa 100644 --- a/tools/testing/selftests/wireguard/qemu/debug.config +++ b/tools/testing/selftests/wireguard/qemu/debug.config @@ -1,5 +1,4 @@ CONFIG_LOCALVERSION="-debug" -CONFIG_ENABLE_MUST_CHECK=y CONFIG_FRAME_POINTER=y CONFIG_STACK_VALIDATION=y CONFIG_DEBUG_KERNEL=y