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[23.128.96.18]) by mx.google.com with ESMTP id hr5si27426232ejc.602.2021.10.12.23.20.56; Tue, 12 Oct 2021 23:21:20 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20210112 header.b=HBrrRoV6; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231559AbhJMGUx (ORCPT + 99 others); Wed, 13 Oct 2021 02:20:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48618 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229991AbhJMGUw (ORCPT ); Wed, 13 Oct 2021 02:20:52 -0400 Received: from mail-il1-x134.google.com (mail-il1-x134.google.com [IPv6:2607:f8b0:4864:20::134]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 949A0C061570 for ; Tue, 12 Oct 2021 23:18:49 -0700 (PDT) Received: by mail-il1-x134.google.com with SMTP id h10so1488397ilq.3 for ; Tue, 12 Oct 2021 23:18:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=p2Vb9i/PJ7w2kwE75H5UZs8Spnuuytnn4odzwjotJmY=; b=HBrrRoV6b/HfdG2UOPggH8S8KCDaj1WWPMVafGBe/8Q59pxiC/Jj5XIOIS9sVm3C9c 694X/sdc0Loy2JcTBl+qLxcH9elOpwIugBv7i6kVl89QyqOroaEZkD8TwPmdbpUWv6F1 FxpSNRtABHzHKIdjKFJjo75h6/QFcQpHRQ//ICfURQVoYJ8HV/4WXIBo4Pw/fhVs1dwS AIT2THjJ5bN6Z8HcHvRNUJTvQrp8Ca9MQNunI7gkW+nl9Ad+EqluRQC60ShF4HiSXL0/ zv0ABMvKJOs3LnQEev20N5v7X8yc7BWK84QJfgviuifqWDMlx9fmpCTchSCmztpzXcEt x48Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=p2Vb9i/PJ7w2kwE75H5UZs8Spnuuytnn4odzwjotJmY=; b=NuipnGGbmssf0y8fue4BU6bpekfIAWNfXY3GRb2XT6AZsF+vXctIS0p6vGfjS3O3x4 x51AJsvEUAC/o0zAHeLnznDB/4FdpbGBQb6Znj4pCwWNy73zPEd5wOpQ4Q2yqJ3JX0LX glN+Rf0DzGgTJQS62pZku1cheo6YmSG3MH3QsfI+GZ4JjG7n/qIxBeeC4ENnAof+NSWi qHricEK/SnRHV6YBJaboz0gKYqOCQU1O+Xv/X3IvTZGIRsKoWoHfzRm1IsFjIIHQgojt mGaN9PofstZQaRBPqkiY9K66nIaI3o2OGQRK9Ndax4HwY9YA9OB92fS+TiNWPQizxphD bjuA== X-Gm-Message-State: AOAM530t4gUycmeEb2rRkGgHGqFxIcOC1ueB3CteaZAvf2mtqisX0s1N rHnHwMKQxLI4p2JvtjJWBN16JkSehXsLvrjAHR4= X-Received: by 2002:a92:c009:: with SMTP id q9mr13987273ild.131.1634105928954; Tue, 12 Oct 2021 23:18:48 -0700 (PDT) MIME-Version: 1.0 References: <202110121132.N2z9JrD0-lkp@intel.com> In-Reply-To: From: Yafang Shao Date: Wed, 13 Oct 2021 14:18:13 +0800 Message-ID: Subject: Re: [tip:sched/core 14/47] kernel/sched/fair.c:893:22: error: variable 'p' set but not used To: Peter Zijlstra Cc: kernel test robot , llvm@lists.linux.dev, kbuild-all@lists.01.org, LKML , x86 Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Oct 12, 2021 at 9:35 PM Peter Zijlstra wrote: > > On Tue, Oct 12, 2021 at 01:26:54PM +0200, Peter Zijlstra wrote: > > > Again, I have absolutely no intention of fixing this. IMO this is the > > compiler being a total pain in the arse. > > > > Please stop reporting this. > > How's this then? > > diff --git a/kernel/sched/Makefile b/kernel/sched/Makefile > index 978fcfca5871..b0d9121c5dce 100644 > --- a/kernel/sched/Makefile > +++ b/kernel/sched/Makefile > @@ -3,6 +3,10 @@ ifdef CONFIG_FUNCTION_TRACER > CFLAGS_REMOVE_clock.o = $(CC_FLAGS_FTRACE) > endif > > +# The compilers are complaining about unused variables inside an if(0) scope > +# block. This is daft, shut them up. > +ccflags-y += -Wno-unused-but-set-variable > + > # These files are disabled because they produce non-interesting flaky coverage > # that is not a function of syscall inputs. E.g. involuntary context switches. > KCOV_INSTRUMENT := n After this diff, the warnings disappear. Tested-by: Yafang Shao -- Thanks Yafang