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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 E4D85C4345F for ; Fri, 19 Apr 2024 15:51:28 +0000 (UTC) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=OHj3fHUB; dkim-atps=neutral Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4VLfJb430Vz3cnv for ; Sat, 20 Apr 2024 01:51:27 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=OHj3fHUB; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=145.40.73.55; helo=sin.source.kernel.org; envelope-from=rppt@kernel.org; receiver=lists.ozlabs.org) Received: from sin.source.kernel.org (sin.source.kernel.org [145.40.73.55]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4VLfHl2ZcGz3cZG for ; Sat, 20 Apr 2024 01:50:43 +1000 (AEST) Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 52AA1CE16E7; Fri, 19 Apr 2024 15:50:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B33F9C3277B; Fri, 19 Apr 2024 15:50:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1713541839; bh=4syrMVBjLG+mqSAuWdu45onjerLE6hugRcJZYIbTm9w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=OHj3fHUBZ5oW6uWZr153zLjsZ6q0yv8DxwxD0Zy4isctsEWry5XXGSfR8Vc3hMrh/ vizLT7qFrrEF533kmJCP3HWtZ7Qzr6mVAw251VXfA8O2WlqLyeSYgvuFfPALuIdv03 8KfWQePVkfruiceot7yZycnjNdoMZw4MifC81l3AU9dBYam0QRDoIaUN7a6lFYb8MN K0Whze6qtl25bkJdh4oiv03gWibiSz5LhY9l5mv+w3PTDhkRKRk4JGDzV2xKnexhV7 tGBMGlG1WEFnNmkggVGWaWOAgxzIa+Avjitv3Mny3kNElAG5XpvzSHnQsEDp7b51Tm Ziw7Ozh3aQ/+w== Date: Fri, 19 Apr 2024 18:49:17 +0300 From: Mike Rapoport To: Masami Hiramatsu Subject: Re: [PATCH v4 14/15] kprobes: remove dependency on CONFIG_MODULES Message-ID: References: <20240411160051.2093261-1-rppt@kernel.org> <20240411160051.2093261-15-rppt@kernel.org> <20240418061615.5fad23b954bf317c029acc4d@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240418061615.5fad23b954bf317c029acc4d@gmail.com> X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , x86@kernel.org, Catalin Marinas , linux-mips@vger.kernel.org, Song Liu , Donald Dutile , Luis Chamberlain , sparclinux@vger.kernel.org, linux-riscv@lists.infradead.org, Nadav Amit , linux-arch@vger.kernel.org, linux-s390@vger.kernel.org, Helge Deller , Huacai Chen , Russell King , linux-trace-kernel@vger.kernel.org, Alexandre Ghiti , Will Deacon , Heiko Carstens , Steven Rostedt , loongarch@lists.linux.dev, Thomas Gleixner , bpf@vger.kernel.org, linux-arm-kernel@lists.infradead.org, Thomas Bogendoerfer , linux-parisc@vger.kernel.org, Puranjay Mohan , linux-mm@kvack.org, netdev@vger.kernel.org, Kent Overstreet , linux-kernel@vger.kernel.org, Dinh Nguyen , =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , Eric Chanudet , Palmer Dabbelt , Andrew Morton , Rick Edgecombe , linuxppc-dev@lists.ozlabs.org, "David S. Miller" , linux-modules@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Hi Masami, On Thu, Apr 18, 2024 at 06:16:15AM +0900, Masami Hiramatsu wrote: > Hi Mike, > > On Thu, 11 Apr 2024 19:00:50 +0300 > Mike Rapoport wrote: > > > From: "Mike Rapoport (IBM)" > > > > kprobes depended on CONFIG_MODULES because it has to allocate memory for > > code. > > > > Since code allocations are now implemented with execmem, kprobes can be > > enabled in non-modular kernels. > > > > Add #ifdef CONFIG_MODULE guards for the code dealing with kprobes inside > > modules, make CONFIG_KPROBES select CONFIG_EXECMEM and drop the > > dependency of CONFIG_KPROBES on CONFIG_MODULES. > > Thanks for this work, but this conflicts with the latest fix in v6.9-rc4. > Also, can you use IS_ENABLED(CONFIG_MODULES) instead of #ifdefs in > function body? We have enough dummy functions for that, so it should > not make a problem. The code in check_kprobe_address_safe() that gets the module and checks for __init functions does not compile with IS_ENABLED(CONFIG_MODULES). I can pull it out to a helper or leave #ifdef in the function body, whichever you prefer. > -- > Masami Hiramatsu -- Sincerely yours, Mike.