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 D05E8C7115C for ; Wed, 25 Jun 2025 16:55:00 +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:MIME-Version: Content-Transfer-Encoding:Content-Type:References:In-Reply-To:Date:Cc: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=SJ5NkjC+cOiMPwKXMdsR+3xgXJFhGnL3/wL1U2zUcWg=; b=vMfAjPeCWqU0+uTXqkKNGkWy5F LyMhSKcQwI+MGkf5pdxuPr9CgBCZJ0KUAUy0QZm1WvrzoHa9tVuytWgOt7g2YreDEwY0YcjipSA/k kOY+HP4JsEKGch0USTDGTyRa2hDDOST81FDbMrLn/nVnA2z8TNWoMxdz8PfXXCzTyQYf2MoVUlJGW N8STNnfZ8o9EWwELFKtOnAC9rvBoqbFRzUMVqSOx4TEhiAvYxHMgG/+wYsV9q2mluzS0/EHhL6nMh buiByKXzQ6YOAk+o/tFfiTrl8JhmWBgryCJFiYd51HgA+kGeiHL0vJ/7w2m2ft+cT8Y7ijm4rOu7q 8gbmDfvQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uUTOh-00000009OGP-3tH9; Wed, 25 Jun 2025 16:54:55 +0000 Received: from s3.sipsolutions.net ([2a01:4f8:242:246e::2] helo=sipsolutions.net) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uUPAi-00000008c8B-3lHy; Wed, 25 Jun 2025 12:24:14 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=sipsolutions.net; s=mail; h=MIME-Version:Content-Transfer-Encoding: Content-Type:References:In-Reply-To:Date:Cc:To:From:Subject:Message-ID:Sender :Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From:Resent-To: Resent-Cc:Resent-Message-ID; bh=SJ5NkjC+cOiMPwKXMdsR+3xgXJFhGnL3/wL1U2zUcWg=; t=1750854252; x=1752063852; b=MN9Gy31nmfmEakoke2YfP1A50ZTyuhlKb0Cx3lelfP0Zaxj eL387tzqooQXuA+ffQ6CcAZcqgvCO6RweS7nRhXLG/hvHvnTZDUj4TQTGtgG7TMVUQkQzG0eJ2dN/ I2SkU68+kAaLpV9WS3zHXFAD64mfHWgjJLj+zWadbnAKmPBmA9zevr6cgvTsCnBKaJUAj3qVuDSZc p3kahB09gue0YfuYh8fgeacKssMXV9XIfLqjoP6vMts+AbklvnX3a0Kv/hR3MickkqqL1LQ06j/g+ I6j9qFGulQSD73OGIT9g7KhEOfim5wK/HWAGDSQ4l4QyUypCyw7fakG4YZJsJuSA==; Received: by sipsolutions.net with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.98.2) (envelope-from ) id 1uUPAV-00000009xvR-1M4X; Wed, 25 Jun 2025 14:23:59 +0200 Message-ID: <81a8b60be5b99ecd9b322d188738016376aff4aa.camel@sipsolutions.net> Subject: Re: [PATCH 2/9] kasan: replace kasan_arch_is_ready with kasan_enabled From: Johannes Berg To: Christophe Leroy , Sabyrzhan Tasbolatov , ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, catalin.marinas@arm.com, will@kernel.org, chenhuacai@kernel.org, kernel@xen0n.name, maddy@linux.ibm.com, mpe@ellerman.id.au, npiggin@gmail.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, richard@nod.at, anton.ivanov@cambridgegreys.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, chris@zankel.net, jcmvbkbc@gmail.com, akpm@linux-foundation.org Cc: guoweikang.kernel@gmail.com, geert@linux-m68k.org, rppt@kernel.org, tiwei.btw@antgroup.com, richard.weiyang@gmail.com, benjamin.berg@intel.com, kevin.brodsky@arm.com, kasan-dev@googlegroups.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-um@lists.infradead.org, linux-mm@kvack.org Date: Wed, 25 Jun 2025 14:23:57 +0200 In-Reply-To: <750b6617-7abf-4adc-b3e6-6194ff10c547@csgroup.eu> References: <20250625095224.118679-1-snovitoll@gmail.com> <20250625095224.118679-3-snovitoll@gmail.com> <750b6617-7abf-4adc-b3e6-6194ff10c547@csgroup.eu> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.56.2 (3.56.2-1.fc42) MIME-Version: 1.0 X-malware-bazaar: not-scanned X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250625_052412_932909_ABCD4889 X-CRM114-Status: UNSURE ( 8.56 ) 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 On Wed, 2025-06-25 at 12:27 +0200, Christophe Leroy wrote: >=20 > Le 25/06/2025 =C3=A0 11:52, Sabyrzhan Tasbolatov a =C3=A9crit=C2=A0: > > Replace the existing kasan_arch_is_ready() calls with kasan_enabled(). > > Drop checks where the caller is already under kasan_enabled() condition= . >=20 > If I understand correctly, it means that KASAN won't work anymore=20 > between patch 2 and 9, because until the arch calls kasan_init_generic()= =20 > kasan_enabled() will return false. >=20 > The transition should be smooth and your series should remain bisectable. >=20 > Or am I missing something ? >=20 Seems right to me, it won't work for architectures that define kasan_arch_is_ready themselves I think? But since they have to literally #define it, could #ifdef on that temporarily? johannes