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=-0.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 48D80C48BD5 for ; Tue, 25 Jun 2019 12:56:16 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1D2A72085A for ; Tue, 25 Jun 2019 12:56:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="XyvPUWDc"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=lca.pw header.i=@lca.pw header.b="DZuLEnT0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1D2A72085A Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lca.pw Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Mime-Version:References:In-Reply-To: Date:To:From:Subject:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=QKf6IAF3cshULsBmx5RGR0CNuiVwwYLQwPwCFPsAXmg=; b=XyvPUWDccFRIKC PFFEUtVrdGJB5+tw/LgLeyYdxgKDpoYHhixTZQ4NuJDDicIF5qObkqQ7kng6OwsXRxEawcvWTCqNh p5rdeR2P5c9+jJu0Y/vpw41NeVjBj1dOmZwCYO8xWBGDERw1a/beBOxxaGK7xlDmy0m85UAaW5AyL 0+k1/WJXY816dSPMZu1HW0BwMwDbeHiEZY3pjMMHxQFBbStAsdNkrGGQ3Oluo3o1ATewwIOi40e4w +TfmOb3C30eCBq+mA44OYP3XZP/WejZmxwrf6Y7aBAYt+tz7VI3QRKm5SKJokHvH5p2xFJGEAAibe 0HdaGiyrhEU8Pa1XrA7A==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hfkzf-0006Jn-H4; Tue, 25 Jun 2019 12:56:15 +0000 Received: from mail-qk1-x741.google.com ([2607:f8b0:4864:20::741]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hfkzc-0006Ix-4u for linux-arm-kernel@lists.infradead.org; Tue, 25 Jun 2019 12:56:13 +0000 Received: by mail-qk1-x741.google.com with SMTP id m14so12437961qka.10 for ; Tue, 25 Jun 2019 05:56:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lca.pw; s=google; h=message-id:subject:from:to:cc:date:in-reply-to:references :mime-version:content-transfer-encoding; bh=OurFPUo7gnihcYVub8SOQDvfLe3fR+6xdFiBUG/mGaU=; b=DZuLEnT0c3Anyy8jegKUBD1pB5R05zrrm6Hg1/EXMvo2Azh30aWlDVwzQ+RXchLRx4 iC/YEH+9byL2b7UGpVIjBWH8xW/ZF3FPppaGwX4xwZn4cyZQAmeTD7xSQKyzUznHunVi 5u+9r26kvl7UvtOw7HersgYkGjYPuhz+17TPW4xuKu47wTkBHPGGXaxe+sIVSE+ccI1Y Mca+ACVEJ5t1XQ2X7BDriCe3dTn7ZfiFxnlGjBD+nX/wcGAbV6ay2T28Sff6M3Zn3npM 2Df0OM/lpjKtZxhLZeisUM3a5HsKxUjS8ix42mJ2sSIsulPxOBiAlsdIFQUFVnkRwn1k FRTg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:mime-version:content-transfer-encoding; bh=OurFPUo7gnihcYVub8SOQDvfLe3fR+6xdFiBUG/mGaU=; b=nKgfwkbnX4F4c3AWEYCsv5hpwM4/EGxOvEAoWzRai52kCkO4YRk/EQ8WVABM+EYLOC 3sYz42HoLfBEX8wff1rnBu3i8u7msULbN8CQGmYucULii2WPIcOxbPn7Ju5BdjMzqSOr FLgIglYRUiExnjoCEgzBFxQjb6eiumjPAhUdYDlMevAenSf21gXmDkoAjWJiPGvjfJRn LY/wTrNDHYHviBL6hjSaJIZnMWt74ItzMZ+zwByAjYmhwo6clrfNVnhdd50ZbVhndXL/ PSid2q/Bk/YYYjqOgXw5C9ezH8meaL3hYt9ML6bWJWpIVkVedljFGUmVtoR5qPoqsB/D v7Iw== X-Gm-Message-State: APjAAAUVDmsNasilPt3IacsOOSFC/dMyxWxLVaoNGhv5ejWHH77oPVqa GShOG0W3VdHIV+ZY4HFCtwJ1Gw== X-Google-Smtp-Source: APXvYqwWcl7FHe5Q6JvWZnREmdhAYa+kjEanHdiJYtr/n0jOQquCki6IOPDpMJhUz8kj9KvU+BHsIA== X-Received: by 2002:a05:620a:15c9:: with SMTP id o9mr84310245qkm.195.1561467371037; Tue, 25 Jun 2019 05:56:11 -0700 (PDT) Received: from dhcp-41-57.bos.redhat.com (nat-pool-bos-t.redhat.com. [66.187.233.206]) by smtp.gmail.com with ESMTPSA id s130sm6740825qke.104.2019.06.25.05.56.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 25 Jun 2019 05:56:10 -0700 (PDT) Message-ID: <1561467369.5154.67.camel@lca.pw> Subject: Re: "arm64: vdso: Substitute gettimeofday() with C implementation" breaks clang build From: Qian Cai To: Vincenzo Frascino Date: Tue, 25 Jun 2019 08:56:09 -0400 In-Reply-To: References: <1561464964.5154.63.camel@lca.pw> X-Mailer: Evolution 3.22.6 (3.22.6-10.el7) Mime-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190625_055612_193198_26AECD0B X-CRM114-Status: GOOD ( 12.43 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: ndesaulniers@google.com, Catalin Marinas , Will Deacon , "linux-kernel@vger.kernel.org" , natechancellor@gmail.com, Thomas Gleixner , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gVHVlLCAyMDE5LTA2LTI1IGF0IDEzOjQ3ICswMTAwLCBWaW5jZW56byBGcmFzY2lubyB3cm90 ZToKPiBIaSBRaWFuLAo+IAo+IE9uIDI1LzA2LzIwMTkgMTM6MTYsIFFpYW4gQ2FpIHdyb3RlOgo+ ID4gVGhlIGxpbnV4LW5leHQgY29tbWl0ICJhcm02NDogdmRzbzogU3Vic3RpdHV0ZSBnZXR0aW1l b2ZkYXkoKSB3aXRoIEMKPiA+IGltcGxlbWVudGF0aW9uIiBbMV0gYnJlYWtzIGNsYW5nIGJ1aWxk Lgo+ID4gCj4gPiBlcnJvcjogaW52YWxpZCB2YWx1ZSAndGlueScgaW4gJy1tY29kZS1tb2RlbCB0 aW55Jwo+ID4gbWFrZVsxXTogKioqIFtzY3JpcHRzL01ha2VmaWxlLmJ1aWxkOjI3OToKPiA+IGFy Y2gvYXJtNjQva2VybmVsL3Zkc28vdmdldHRpbWVvZmRheS5vXSBFcnJvciAxCj4gPiBtYWtlWzFd OiAqKiogV2FpdGluZyBmb3IgdW5maW5pc2hlZCBqb2JzLi4uLgo+ID4gbWFrZTogKioqIFthcmNo L2FybTY0L01ha2VmaWxlOjE4MDogdmRzb19wcmVwYXJlXSBFcnJvciAyCj4gPiAKPiA+IFsxXSBo dHRwczovL3BhdGNod29yay5rZXJuZWwub3JnL3BhdGNoLzExMDA5NjYzLwo+ID4gCj4gCj4gSSBh bSBub3Qgc3VyZSB3aGF0IGRvZXMgZXhhY3RseSBicmVhayBmcm9tIHlvdXIgcmVwb3J0LiBDb3Vs ZCB5b3UgcGxlYXNlCj4gcHJvdmlkZQo+IG1vcmUgZGV0YWlscz8KCkhlcmUgaXMgdGhlIGNvbmZp ZyB0byByZXByb2R1Y2UuCgpodHRwczovL3Jhdy5naXRodWJ1c2VyY29udGVudC5jb20vY2FpbGNh L2xpbnV4LW1tL21hc3Rlci9hcm02NC5jb25maWcKCiMgbWFrZSBDQz1jbGFuZyAtaiAkKG5yX2Nw dXMpCgpJIGNhbiBnZXQgaXQgd29ya2luZyBhZ2FpbiBieSByZW1vdmluZyAiLW1jbW9kZWw9dGlu eSIgaW4KYXJjaC9hcm02NC9rZXJuZWwvdmRzby9NYWtlZmlsZQoKPiAKPiBPbiBteSBlbnY6Cj4g Cj4gJCBtYWtlIG1ycHJvcGVyICYmIG1ha2UgZGVmY29uZmlnICYmIG1ha2UgQ0M9Y2xhbmcgSE9T VENDPWNsYW5nIC1qJChucHJvYykKPiAKPiAuLi4KPiAKPiBhcmNoL2FybTY0L01ha2VmaWxlOjU2 OiBDUk9TU19DT01QSUxFX0NPTVBBVCBpcyBjbGFuZywgdGhlIGNvbXBhdCB2RFNPIHdpbGwKPiBu b3QKPiBiZSBidWlsdAo+IAo+IC4uLgo+IAo+IMKgIExEU8KgwqDCoMKgwqBhcmNoL2FybTY0L2tl cm5lbC92ZHNvL3Zkc28ubGRzCj4gwqAgQVPCoMKgwqDCoMKgwqBhcmNoL2FybTY0L2tlcm5lbC92 ZHNvL25vdGUubwo+IMKgIEFTwqDCoMKgwqDCoMKgYXJjaC9hcm02NC9rZXJuZWwvdmRzby9zaWdy ZXR1cm4ubwo+IMKgIENDwqDCoMKgwqDCoMKgYXJjaC9hcm02NC9rZXJuZWwvdmRzby92Z2V0dGlt ZW9mZGF5Lm8KPiDCoCBMRMKgwqDCoMKgwqDCoGFyY2gvYXJtNjQva2VybmVsL3Zkc28vdmRzby5z by5kYmcKPiDCoCBWRFNPQ0hLIGFyY2gvYXJtNjQva2VybmVsL3Zkc28vdmRzby5zby5kYmcKPiDC oCBWRFNPU1lNIGluY2x1ZGUvZ2VuZXJhdGVkL3Zkc28tb2Zmc2V0cy5oCj4gCj4gLi4uCj4gCj4g wqAgTETCoMKgwqDCoMKgwqB2bWxpbnV4Lm8KPiDCoCBNT0RQT1NUIHZtbGludXgubwo+IMKgIE1P RElORk8gbW9kdWxlcy5idWlsdGluLm1vZGluZm8KPiDCoCBLU1lNwqDCoMKgwqAudG1wX2thbGxz eW1zMS5vCj4gwqAgS1NZTcKgwqDCoMKgLnRtcF9rYWxsc3ltczIubwo+IMKgIExEwqDCoMKgwqDC oMKgdm1saW51eAo+IMKgIFNPUlRFWMKgwqB2bWxpbnV4Cj4gwqAgU1lTTUFQwqDCoFN5c3RlbS5t YXAKPiDCoCBCdWlsZGluZyBtb2R1bGVzLCBzdGFnZSAyLgo+IMKgIE9CSkNPUFkgYXJjaC9hcm02 NC9ib290L0ltYWdlCj4gwqAgTU9EUE9TVCA0ODMgbW9kdWxlcwo+IAoKX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtYXJtLWtlcm5lbCBtYWlsaW5n IGxpc3QKbGludXgtYXJtLWtlcm5lbEBsaXN0cy5pbmZyYWRlYWQub3JnCmh0dHA6Ly9saXN0cy5p bmZyYWRlYWQub3JnL21haWxtYW4vbGlzdGluZm8vbGludXgtYXJtLWtlcm5lbAo= 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=-0.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS 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 E5074C48BD5 for ; 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[66.187.233.206]) by smtp.gmail.com with ESMTPSA id s130sm6740825qke.104.2019.06.25.05.56.09 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 25 Jun 2019 05:56:10 -0700 (PDT) Message-ID: <1561467369.5154.67.camel@lca.pw> Subject: Re: "arm64: vdso: Substitute gettimeofday() with C implementation" breaks clang build From: Qian Cai To: Vincenzo Frascino Cc: Thomas Gleixner , Will Deacon , Catalin Marinas , linux-arm-kernel@lists.infradead.org, "linux-kernel@vger.kernel.org" , natechancellor@gmail.com, ndesaulniers@google.com Date: Tue, 25 Jun 2019 08:56:09 -0400 In-Reply-To: References: <1561464964.5154.63.camel@lca.pw> Content-Type: text/plain; charset="UTF-8" X-Mailer: Evolution 3.22.6 (3.22.6-10.el7) Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 2019-06-25 at 13:47 +0100, Vincenzo Frascino wrote: > Hi Qian, > > On 25/06/2019 13:16, Qian Cai wrote: > > The linux-next commit "arm64: vdso: Substitute gettimeofday() with C > > implementation" [1] breaks clang build. > > > > error: invalid value 'tiny' in '-mcode-model tiny' > > make[1]: *** [scripts/Makefile.build:279: > > arch/arm64/kernel/vdso/vgettimeofday.o] Error 1 > > make[1]: *** Waiting for unfinished jobs.... > > make: *** [arch/arm64/Makefile:180: vdso_prepare] Error 2 > > > > [1] https://patchwork.kernel.org/patch/11009663/ > > > > I am not sure what does exactly break from your report. Could you please > provide > more details? Here is the config to reproduce. https://raw.githubusercontent.com/cailca/linux-mm/master/arm64.config # make CC=clang -j $(nr_cpus) I can get it working again by removing "-mcmodel=tiny" in arch/arm64/kernel/vdso/Makefile > > On my env: > > $ make mrproper && make defconfig && make CC=clang HOSTCC=clang -j$(nproc) > > ... > > arch/arm64/Makefile:56: CROSS_COMPILE_COMPAT is clang, the compat vDSO will > not > be built > > ... > >   LDS     arch/arm64/kernel/vdso/vdso.lds >   AS      arch/arm64/kernel/vdso/note.o >   AS      arch/arm64/kernel/vdso/sigreturn.o >   CC      arch/arm64/kernel/vdso/vgettimeofday.o >   LD      arch/arm64/kernel/vdso/vdso.so.dbg >   VDSOCHK arch/arm64/kernel/vdso/vdso.so.dbg >   VDSOSYM include/generated/vdso-offsets.h > > ... > >   LD      vmlinux.o >   MODPOST vmlinux.o >   MODINFO modules.builtin.modinfo >   KSYM    .tmp_kallsyms1.o >   KSYM    .tmp_kallsyms2.o >   LD      vmlinux >   SORTEX  vmlinux >   SYSMAP  System.map >   Building modules, stage 2. >   OBJCOPY arch/arm64/boot/Image >   MODPOST 483 modules >