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 41028CA5FD4 for ; Fri, 2 Oct 2026 11:02:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=BD1R9LcTcWdYsVPjs7Tg7VL+4+XCIKdO+aznbWqlk60=; b=dYnwHL1PTyZVTS uhT1Q/Refx51KiShjT0av/NkkQi+3zkn0HZ/OwRIzWCjLBroLnfw2zcQ3m8BN7DWtpcZYMjVtyJZZ 4CFmpwAu34ERopO8H1HFeeOBV4lrDETD+tkdGsattrEQVYKQHOKhdPRw1P/nvbMpm/VXXI0py0bbY B/LK8ryWjwpIhiQrXhBjd43Gkx4LO4wKLgLKp66JrJAKDrmTRCq03CwrJb9Jmi23VB9RhwDR7sHqY y1HUBV0MUNDztLUbs0Z0kOf/5AAl4cP1ZkDHAxmKzAfmxe/aKNfu3561C+2ALswR9j4Vm0nDv78v2 wnimujZxnsqruEL53Ivw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCb2D-0000000BPrV-2Cpa; Fri, 02 Oct 2026 11:02:37 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xCb2C-0000000BPqi-0tgN; Fri, 02 Oct 2026 11:02:36 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id EE73841234; Fri, 2 Oct 2026 11:02:35 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8A0031F000FF; Fri, 2 Oct 2026 11:02:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790938955; bh=hKu1k8kGP5SDfYzTUe6BEg1Rh9OEx1S7cLJzvwkIo8E=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=fSA8KOPcMfD4nTuoQwZ65dnTEvIIcs8MuGlPn8Fs/+3fC7NLGpsaO+RpN1IgsIBZu AUxBtepWGjjVI3M99anax4EK04p2VnA9VIFZGzrlLQlbKdH3xKIuLyNNV+nBS2gK+K 5MooxFs6WNfBX0ph/LCjwbFGsD5J8aN8q3nq6gL6dt66NTeVQTiBN3PJLVIx5KOpvx kE87mNLRWpd4R0tmXsVbWwfvfFM0lYN5bAuwZWdHMhEK58ZB7SZ2YSx28z9+Nwg3HW ESud0bA/Itaq1CPRhVc11wMDE18rRr2PF7dQo3epBifa0/5Uf6eMwX7MZUn8/gFQ9j MDkdSwxtvaqxw== Message-ID: Date: Fri, 2 Oct 2026 13:02:26 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] random: vDSO: Avoid call to memset() when zeroing reserved in __cvdso_getrandom_data() To: "Jason A. Donenfeld" Cc: Andy Lutomirski , Thomas Gleixner , Theodore Ts'o , Nathan Chancellor , Vincenzo Frascino , Nick Desaulniers , Bill Wendling , Justin Stitt , Catalin Marinas , Will Deacon , Mark Rutland , Huacai Chen , WANG Xuerui , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Paul Walmsley , Palmer Dabbelt , Albert Ou , Alexandre Ghiti , Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Christian Borntraeger , Sven Schnelle , Ingo Molnar , Borislav Petkov , Dave Hansen , "H. Peter Anvin" , x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, llvm@lists.linux.dev References: <20260925-vdso-getrandom-avoid-memset-llvm-24-v2-1-ce640f872393@kernel.org> <179093852073.149722.832232613857480812.b4-ty@kernel.org> Content-Language: fr-FR From: "Christophe Leroy (CS GROUP)" In-Reply-To: X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org CgpMZSAwMi8xMC8yMDI2IMOgIDEyOjU4LCBKYXNvbiBBLiBEb25lbmZlbGQgYSDDqWNyaXTCoDoK PiBPbiBGcmksIE9jdCAyLCAyMDI2IGF0IDEyOjU34oCvUE0gQ2hyaXN0b3BoZSBMZXJveSAoQ1Mg R1JPVVApCj4gPGNobGVyb3lAa2VybmVsLm9yZz4gd3JvdGU6Cj4+Cj4+Cj4+IE9uIEZyaSwgMjUg U2VwIDIwMjYgMjI6NDY6MzIgKzAxMDAsIE5hdGhhbiBDaGFuY2VsbG9yIHdyb3RlOgo+Pj4gQWZ0 ZXIgYSByZWNlbnQgY2hhbmdlIGluIExMVk0gWzFdLCBidWlsZHMgd2l0aCB0aGUgcmFuZG9tIHZE U08KPj4+IGltcGxlbWVudGF0aW9uLCBzdWNoIGFzIFBvd2VyUEMgYW5kIFJJU0MtViwgZmFpbCB3 aGVuIGNoZWNraW5nIHRoZSB2RFNPOgo+Pj4KPj4+ICAgIGFyY2gvcG93ZXJwYy9rZXJuZWwvdmRz by92ZHNvMzIuc28uZGJnOiBkeW5hbWljIHJlbG9jYXRpb25zIGFyZSBub3Qgc3VwcG9ydGVkCj4+ PiAgICBhcmNoL3Jpc2N2L2tlcm5lbC92ZHNvL3Zkc28uc28uZGJnOiBkeW5hbWljIHJlbG9jYXRp b25zIGFyZSBub3Qgc3VwcG9ydGVkCj4+Pgo+Pj4gbWVtc2V0KCkgaXMgbm93IGdlbmVyYXRlZCB3 aGVuIHplcm9pbmcgcGFyYW1zLT5yZXNlcnZlZCBmb3Igc29tZSBidWlsZHMKPj4+IGJlY2F1c2Ug TExWTSBoYXMgYW4gb3B0aW1pemF0aW9uIChub3cgcnVuIGluIG1vcmUgaW5zdGFuY2VzKSB0aGF0 IGNhbgo+Pj4gcmVjb2duaXplIGF0IGNvbXBpbGUgdGltZSB3aGVuIGl0IGlzIGFzc2lnbmluZyBh IHN0YXRpYyB2YWx1ZSB0byBhCj4+PiBjb250aWd1b3VzIGFyZWEgb2YgbWVtb3J5IGFuZCB0dXJu IHRoYXQgaW50byBhIGNhbGwgdG8gbWVtc2V0KCkuIEJvdGgKPj4+IGNsYW5nIGFuZCBHQ0MgYXNz dW1lIG1lbXNldCgpIGlzIGFsd2F5cyBhdmFpbGFibGUgWzJdLgo+Pj4KPj4+IFsuLi5dCj4+Cj4+ IEFwcGxpZWQsIHRoYW5rcyEKPj4KPj4gWzEvMV0gcmFuZG9tOiB2RFNPOiBBdm9pZCBjYWxsIHRv IG1lbXNldCgpIHdoZW4gemVyb2luZyByZXNlcnZlZCBpbiBfX2N2ZHNvX2dldHJhbmRvbV9kYXRh KCkKPj4gICAgICAgIChubyBjb21taXQgaW5mbykKPiAKPiBUaGF0J3Mgbm90IGZvciB5b3UgdG8g YXBwbHkuIEknbSBzZW5kaW5nIHRoaXMgdGhyb3VnaCBteSByYW5kb20gdHJlZSwKPiBhbG9uZyB3 aXRoIGEgaGFuZGZ1bCBvZiBvdGhlciB0aGluZ3MgSSBuZWVkIHRvIGZpeC4gQnV0IEkgd2FudGVk IHRvCj4gbGV0IHRoaXMgY29vayBhIGJpdCBtb3JlLiBJIGNhbiBhZGQgeW91ciByZXZpZXdlZC1i eSBsaW5lLCB0aG91Z2guCgpTb3JyeSBJIG1lc3NlZCB1cCB3aXRoICdiNCB0eScsIEkgZG8gbm90 IGludGVudCB0byB0YWtlIHRoaXMgcGF0Y2ggaW4gbXkgCnRyZWUuCgpfX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpsaW51eC1yaXNjdiBtYWlsaW5nIGxpc3QK bGludXgtcmlzY3ZAbGlzdHMuaW5mcmFkZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9y Zy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4LXJpc2N2Cg==