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 Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7D0B9C4332F for ; Sat, 5 Nov 2022 20:54:14 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 83EBC6B0072; Sat, 5 Nov 2022 16:54:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 7A0DB6B0073; Sat, 5 Nov 2022 16:54:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 641286B0074; Sat, 5 Nov 2022 16:54:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0010.hostedemail.com [216.40.44.10]) by kanga.kvack.org (Postfix) with ESMTP id 51C536B0072 for ; Sat, 5 Nov 2022 16:54:13 -0400 (EDT) Received: from smtpin08.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay09.hostedemail.com (Postfix) with ESMTP id 25EE380733 for ; Sat, 5 Nov 2022 20:54:13 +0000 (UTC) X-FDA: 80100591186.08.01258B3 Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by imf01.hostedemail.com (Postfix) with ESMTP id DB38640002 for ; Sat, 5 Nov 2022 20:54:10 +0000 (UTC) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id BE9FCB80757; Sat, 5 Nov 2022 20:54:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 44D08C433D6; Sat, 5 Nov 2022 20:54:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=zx2c4.com; s=20210105; t=1667681644; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=i7VzbHs3BM65bfeje5J/vcPyhiPEz9B6um2ZY1Qg0CY=; b=ngpdoQqfSX6MNYGUji9kC1NBLZQAZtE8ptWolbRaV2PE7nBQD9BLrEoNhbt6FrYjGI33p8 Qg+qOVCAhyRFXzML7v0FR2sd6aR/CObgEkqTm9L5ykJgab/bCdDTM4VOv/v/xTcVLA/KTW q9UfOCmJuV5DNoiHgGR3xdkte6DAnqY= Received: by mail.zx2c4.com (ZX2C4 Mail Server) with ESMTPSA id eb30089a (TLSv1.3:TLS_AES_256_GCM_SHA384:256:NO); Sat, 5 Nov 2022 20:54:04 +0000 (UTC) Date: Sat, 5 Nov 2022 21:54:01 +0100 From: "Jason A. Donenfeld" To: Peter Zijlstra Cc: Linus Torvalds , Nathan Chancellor , Uros Bizjak , x86@kernel.org, willy@infradead.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, aarcange@redhat.com, kirill.shutemov@linux.intel.com, jroedel@suse.de Subject: Re: [PATCH 11/13] x86_64: Remove pointless set_64bit() usage Message-ID: References: <20221022111403.531902164@infradead.org> <20221022114425.168036718@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1667681651; a=rsa-sha256; cv=none; b=RVZAa4MzQMDYkImjlbedpjANIKCGG5jHiVU6+Fof4r0jxGCr6s2ojbpC6wCGP7cVgRhixs Fr3xVGk+ZPCxalR2oug9CPE17ufpFM0Vo7+aoQf1DKeJ/Nig+UigjD/rY8I0vlaCSwAszh 57DQMPHHii2M3lM7KeIT31p9Ha4TROI= ARC-Authentication-Results: i=1; imf01.hostedemail.com; dkim=pass header.d=zx2c4.com header.s=20210105 header.b=ngpdoQqf; dmarc=pass (policy=quarantine) header.from=zx2c4.com; spf=pass (imf01.hostedemail.com: domain of "SRS0=HBtZ=3F=zx2c4.com=Jason@kernel.org" designates 145.40.68.75 as permitted sender) smtp.mailfrom="SRS0=HBtZ=3F=zx2c4.com=Jason@kernel.org" ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1667681651; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=i7VzbHs3BM65bfeje5J/vcPyhiPEz9B6um2ZY1Qg0CY=; b=sdqo4IwGl5pQgSIrob26/6yxwWPop+3SPt1wBHwW5PQ48ZV2wzphC+D50ph5uN0RA6Z8nX q+iT/jWKZUkkjbThVVWSK+B99FBy0qGI3yEIP3i69oJc8g305poGejYMRO1UoMdOT5Pfm4 7VSm4xBMalwYOtLe896ogOhyUMrxYHQ= X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: DB38640002 X-Rspam-User: Authentication-Results: imf01.hostedemail.com; dkim=pass header.d=zx2c4.com header.s=20210105 header.b=ngpdoQqf; dmarc=pass (policy=quarantine) header.from=zx2c4.com; spf=pass (imf01.hostedemail.com: domain of "SRS0=HBtZ=3F=zx2c4.com=Jason@kernel.org" designates 145.40.68.75 as permitted sender) smtp.mailfrom="SRS0=HBtZ=3F=zx2c4.com=Jason@kernel.org" X-Stat-Signature: n61o5hn476b1pwd7ptwogeirhggw9kgm X-HE-Tag: 1667681650-476392 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Sat, Nov 05, 2022 at 04:14:19PM +0100, Peter Zijlstra wrote: > Also: > > $ ./align > 16, 16 > > --- > > #include > > int main(int argx, char **argv) > { > __int128 a; > > printf("%d, %d\n", sizeof(a), __alignof(a)); > return 0; > } zx2c4@thinkpad /tmp $ x86_64-linux-musl-gcc -O2 a.c -static && qemu-x86_64 ./a.out 16, 16 zx2c4@thinkpad /tmp $ aarch64-linux-musl-gcc -O2 a.c -static && qemu-aarch64 ./a.out 16, 16 zx2c4@thinkpad /tmp $ powerpc64le-linux-musl-gcc -O2 a.c -static && qemu-ppc64le ./a.out 16, 16 zx2c4@thinkpad /tmp $ s390x-linux-musl-gcc -O2 a.c -static && qemu-s390x ./a.out 16, 8 zx2c4@thinkpad /tmp $ riscv64-linux-musl-gcc -O2 a.c -static && qemu-riscv64 ./a.out 16, 16 Er, yea, you're right. Looks like of these, it's just s390x, so whatever. Jason