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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 391FACD98F2 for ; Fri, 19 Jun 2026 14:09:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: References:In-Reply-To:Subject:Cc:To:From:Message-ID:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=oX0zVzxOibG8jKkwq0Sogtzj/vI7u0kFJcdFT/IKKQU=; b=0mp6Mnay/QEJJeEw+bjJpE0DU0 Ohy5nonJkjytmb2s8uZXbcp4VQ19ippZ1K/QlRwKPlU2PT+dFFbMa02ayCPBbpnf025qsRnO+9fF0 MtPTb6CIcc/C5K3nKXJFd6XWHA2X059Eix8l9XSoIeFC9Bi7RXlNhgELk3Bv0cAgX+dT8+Jzrcm3S 8QkWmMPCK3MoTnELuI0+X90DwcMF0Wr5Qs19jBA8O3hZ+gWID7bgHt1U0EtziD1fBKvvQycgACoS2 ejKnLf7kXBujrTAiKRajGfxCHVoXSYOkwYUl1gRh3KqVPBXpC8YByPAcFbZMlhaJLDiJ6IU9hR4vF pLNZ637Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1waZuV-00000002Xb2-0hay; Fri, 19 Jun 2026 14:09:31 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1waZuU-00000002XZv-2PEA for linux-arm-kernel@lists.infradead.org; Fri, 19 Jun 2026 14:09:30 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 7EFAC601E3; Fri, 19 Jun 2026 14:09:29 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3424C1F000E9; Fri, 19 Jun 2026 14:09:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1781878169; bh=oX0zVzxOibG8jKkwq0Sogtzj/vI7u0kFJcdFT/IKKQU=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=LnHUPopDtuhqRuMwlZSLepaA4bKicUJFN+aLJCxw07ZHHhTlLtoa6MjTgFdLM4oUt H1+rKV4KRoSmq41i6tNhS0YCwFKpWIY7vFIc7cNt60eFuf/6t3FlHL0n+XW5l3R+uA PtfAs8tK6QysuniWEpG2JVmZR6AA4OfxB/NAczfYwVj3lPRyjlpMcmgCOKXtmhwxin jbkski8s4LyfeYHYm9qPicIbglbbz9i2uXkSoNZLsxXjChR9X95UbvlwPJWrtQsZN0 ocuzdtdmhMH7N8HNsTEfOz3U2YfqAobUgQRAcdHFR3Z9iAgyYkAb0KIgKoEwMh12UB VJ+Bd3eosjxuw== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1waZuQ-0000000EL5P-3z09; Fri, 19 Jun 2026 14:09:27 +0000 Date: Fri, 19 Jun 2026 15:09:26 +0100 Message-ID: <86a4sqsju1.wl-maz@kernel.org> From: Marc Zyngier To: Will Deacon Cc: linux-arm-kernel@lists.infradead.org, Arnd Bergmann , Nick Desaulniers , Steffen Eiden , Andreas Grapentin , Catalin Marinas , Dave Martin , Mark Rutland Subject: Re: [PATCH] arm64: uapi: Use __u128 instead of __uint128_t in UAPI headers In-Reply-To: <20260619130835.5678-1-will@kernel.org> References: <20260619130835.5678-1-will@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: will@kernel.org, linux-arm-kernel@lists.infradead.org, arnd@arndb.de, nick.desaulniers+lkml@gmail.com, seiden@linux.ibm.com, gra@linux.ibm.com, catalin.marinas@arm.com, dave.martin@arm.com, mark.rutland@arm.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, 19 Jun 2026 14:08:34 +0100, Will Deacon wrote: > > The arm64 UAPI exposes '__uint128_t' types in the members of > 'struct user_fpsimd_state', 'struct user_pac_address_keys' and in the > signal frame via 'struct fpsimd_context'. Since the alignment of such > a type appears to be non-portable (16 bytes on arm64, 8 bytes on s390), > prefer the '__u128' typedef from uapi/linux/types.h, which makes the > alignment explicit and allows the definitions to be reused by other > host architectures. > > Cc: Arnd Bergmann > Cc: Nick Desaulniers > Cc: Steffen Eiden > Cc: Andreas Grapentin > Cc: Catalin Marinas > Cc: Dave Martin > Cc: Mark Rutland > Cc: Marc Zyngier > Signed-off-by: Will Deacon FWIW: Reviewed-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.