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 88BA6FF885D for ; Sun, 26 Apr 2026 19:04:28 +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:In-Reply-To: Content-Transfer-Encoding:Content-Type:MIME-Version:References:Message-ID: Subject:Cc:To:From:Date:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=FITUIvH3OOKTM6pJeboLI1HfwgwJYxbryeU4nh+FdnE=; b=HOtGMCwjHvozQq8hc4abEQGiOr /IfAD5iqKapYWnZuiYGkTJjdydlRJDqNllaPGZtm/id9Sdk8HkNdwjaLfGk9tZZ2WkAawDZzVh0ij wvRrz421wX38FOe4FrBWSNKb1GA4VzsTr8KNUEnAYlbpP5QPpyja/9hOJlA0H5JRIAwath3H8INsu 98+T7pszNcrdG69/OH60Y2pIhY3POHQ1YHZs4WWTRx4seJ8XWXQNen/RfMU4nayDn9S4lSpO6Mlmo N8Br58mGSXkrt5MlpZjzrrthBJ/z9rVdAabYlcEZ5b0kZlN1/8X2SXZgeUVQy2eZFi/WjiUZ+pa3w oUf0zfnw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1wH4mD-0000000FmNm-32kR; Sun, 26 Apr 2026 19:04:21 +0000 Received: from todd.t-8ch.de ([159.69.126.157]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1wH4mB-0000000FmNE-1394 for linux-arm-kernel@lists.infradead.org; Sun, 26 Apr 2026 19:04:20 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=weissschuh.net; s=mail; t=1777230255; bh=cL909OqLMd5VzANrjK7Nm/XEbexMuPAlas4Ce1GEC8o=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=eHNUcbuCZilNwpHrn0AE0Yn4krgyTNzjDGoxNuscpKIOVVWM0QoT0gEDctOpBwiAL TQLYYNLH702PIhm8Gg34eRi+IibwULREquFg0ov4wUBlBQjhV/nJ0u0s8tk0xvqXnG BtiWRxFFBVLirNHcKKcDMrlU74nOSVdnXrShtZ40= Date: Sun, 26 Apr 2026 21:04:14 +0200 From: Thomas =?utf-8?Q?Wei=C3=9Fschuh?= To: =?utf-8?B?QW5kcsOp?= Almeida Cc: Catalin Marinas , Will Deacon , Thomas Gleixner , Mark Rutland , Mathieu Desnoyers , Sebastian Andrzej Siewior , Carlos O'Donell , Peter Zijlstra , Florian Weimer , Rich Felker , Torvald Riegel , Darren Hart , Ingo Molnar , Davidlohr Bueso , Arnd Bergmann , "Liam R . Howlett" , Uros Bizjak , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, kernel-dev@igalia.com Subject: Re: [PATCH RFC v2 1/2] arm64: vdso: Prepare for robust futex unlock support Message-ID: References: <20260424-tonyk-robust_arm-v2-0-db4e46f752cf@igalia.com> <20260424-tonyk-robust_arm-v2-1-db4e46f752cf@igalia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20260424-tonyk-robust_arm-v2-1-db4e46f752cf@igalia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260426_120419_436246_1360AF9B X-CRM114-Status: UNSURE ( 9.39 ) X-CRM114-Notice: Please train this message. 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 One more thing, sorry for the spam. On 2026-04-24 15:56:00-0300, André Almeida wrote: (...) > +#ifdef CONFIG_FUTEX_ROBUST_UNLOCK > +static void vdso_futex_robust_unlock_update_ips(enum vdso_abi abi, struct mm_struct *mm) > +{ > + unsigned long vdso = (unsigned long) mm->context.vdso; > + struct futex_mm_data *fd = &mm->futex; > + uintptr_t success, end; > + > + if (abi == VDSO_ABI_AA64) { > + success = (uintptr_t) VDSO_SYMBOL(vdso, futex_list64_try_unlock_cs_success); > + end = (uintptr_t) VDSO_SYMBOL(vdso, futex_list64_try_unlock_cs_end); > + > + futex_set_vdso_cs_range(fd, 0, vdso, success, end, false); > + } > + > +#ifdef CONFIG_COMPAT_VDSO > + if (abi == VDSO_ABI_AA32) { > + success = (uintptr_t) VDSO_SYMBOL(vdso, futex_list32_try_unlock_cs_success); > + end = (uintptr_t) VDSO_SYMBOL(vdso, futex_list32_try_unlock_cs_end); The futex_list32_ symbols here are in the 64-bit vDSO. They are not applicable for VDSO_ABI_AA32 processes. > + > + futex_set_vdso_cs_range(fd, 1, vdso, success, end, true); > + } > +#endif > +} (...)