From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 80EB739FCA5; Mon, 16 Mar 2026 15:44:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773675857; cv=none; b=Wl0qspi+6sLTnl16w2FOD1dU6wxX9XyOKKZVd4KVojvCgK4aIf7fNItmxxF5FwlEbqIozENifyWfuQgL8ebesqQ+NpRfJy9dHPWQUHiFk7nhb2zo99tY7b9x1W0rp96dKeoZkRDgL5fklITUaqC1VWpXzpEDWzGHZcGxFulK4BM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773675857; c=relaxed/simple; bh=rdPrmaCVzwqoOdH/w9Rq+WAUu6772RowRxAGuiDTynE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=M4TbQALfGtxSs5dAyVriT+dC7KlEizhcnJ24ud85ekzMKpAl2VLX2u5w/uFfD1l+ZRJUqEk9Q105d2WmumRlwkXTdm1sFxiiZ8ZrNuoDg1iBzkpwq8c+ZMQkJhdi8UCIfUkFWmlvDTmsUe9dSH9+5IO9lLdUEjXtmePMHxoleAw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=dItczp0J; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="dItczp0J" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0D886C19421; Mon, 16 Mar 2026 15:44:03 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773675857; bh=rdPrmaCVzwqoOdH/w9Rq+WAUu6772RowRxAGuiDTynE=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=dItczp0J7s3JbcmLYw6T+eYP8v6IxOLER3X08QrxDCF7vJ+LChgARvJWxxMSq9mCQ Zvuu6WN0xxAIrCiYX3UmyTUT614rpbkHr3r/yT8q0XC21gxKHkqVJZlgGailW5/21/ QnpDs/s4WjNZVsHLJ5zbQngX0+8gkrOcdZxxp3Brg4jcKLq0te5gRz65FbOzKutoY3 2Q+YgJinfB+TdSi6Nr/D8JVYKF9nvtK9VMjXrYqpxPRIl/ocOqmmZSUdZo9vqfd9N9 QWuF7U4K2TuyKe1Sd2b+nTJgX2qIkGklDPE210SPSgeBnjUIkvvYtYwfRmpTL9Tuqe U3/fQMbmPNMMA== Message-ID: Date: Mon, 16 Mar 2026 16:44:01 +0100 Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 01/10 net-next v2] ipv6: convert CONFIG_IPV6 to built-in only and clean up Kconfigs To: Fernando Fernandez Mancera , netdev@vger.kernel.org Cc: rbm@suse.com, Geert Uytterhoeven , Jason Gunthorpe , Leon Romanovsky , Selvin Xavier , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Ido Schimmel , Petr Machata , Simon Horman , Saurav Kashyap , Javed Hasan , "maintainer:BROADCOM BNX2FC 10 GIGABIT FCOE DRIVER" , "James E.J. Bottomley" , "Martin K. Petersen" , Nilesh Javali , Manish Rangankar , Varun Prakash , Alexander Aring , David Teigland , Andreas Gruenbacher , Nikolay Aleksandrov , David Ahern , Pablo Neira Ayuso , Florian Westphal , Phil Sutter , David Howells , Marc Dionne , Marcelo Ricardo Leitner , Xin Long , Jon Maloy , Krzysztof Kozlowski , Bjorn Andersson , Arnd Bergmann , Eric Biggers , Michal Simek , Luca Weiss , Sven Peter , Lad Prabhakar , Kuninori Morimoto , Andrew Morton , David Gow , Kuan-Wei Chiu , Ryota Sakamoto , Kir Chou , Kuniyuki Iwashima , Herbert Xu , Vikas Gupta , Bhargava Marreddy , Rajashekar Hudumula , =?UTF-8?Q?Markus_Bl=C3=B6chl?= , Heiner Kallweit , open list , "open list:M68K ARCHITECTURE" , "open list:INFINIBAND SUBSYSTEM" , "open list:NETRONOME ETHERNET DRIVERS" , "open list:BROADCOM BNX2FC 10 GIGABIT FCOE DRIVER" , "open list:DISTRIBUTED LOCK MANAGER (DLM)" , "open list:ETHERNET BRIDGE" , "open list:NETFILTER" , "open list:NETFILTER" , "open list:RXRPC SOCKETS (AF_RXRPC)" , "open list:SCTP PROTOCOL" , "open list:TIPC NETWORK LAYER" References: <20260310153506.5181-1-fmancera@suse.de> <20260310153506.5181-2-fmancera@suse.de> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; keydata= xsFNBFVDQq4BEAC6KeLOfFsAvFMBsrCrJ2bCalhPv5+KQF2PS2+iwZI8BpRZoV+Bd5kWvN79 cFgcqTTuNHjAvxtUG8pQgGTHAObYs6xeYJtjUH0ZX6ndJ33FJYf5V3yXqqjcZ30FgHzJCFUu JMp7PSyMPzpUXfU12yfcRYVEMQrmplNZssmYhiTeVicuOOypWugZKVLGNm0IweVCaZ/DJDIH gNbpvVwjcKYrx85m9cBVEBUGaQP6AT7qlVCkrf50v8bofSIyVa2xmubbAwwFA1oxoOusjPIE J3iadrwpFvsZjF5uHAKS+7wHLoW9hVzOnLbX6ajk5Hf8Pb1m+VH/E8bPBNNYKkfTtypTDUCj NYcd27tjnXfG+SDs/EXNUAIRefCyvaRG7oRYF3Ec+2RgQDRnmmjCjoQNbFrJvJkFHlPeHaeS BosGY+XWKydnmsfY7SSnjAzLUGAFhLd/XDVpb1Een2XucPpKvt9ORF+48gy12FA5GduRLhQU vK4tU7ojoem/G23PcowM1CwPurC8sAVsQb9KmwTGh7rVz3ks3w/zfGBy3+WmLg++C2Wct6nM Pd8/6CBVjEWqD06/RjI2AnjIq5fSEH/BIfXXfC68nMp9BZoy3So4ZsbOlBmtAPvMYX6U8VwD TNeBxJu5Ex0Izf1NV9CzC3nNaFUYOY8KfN01X5SExAoVTr09ewARAQABzSVLcnp5c3p0b2Yg S296bG93c2tpIDxrcnprQGtlcm5lbC5vcmc+wsGVBBMBCgA/AhsDBgsJCAcDAgYVCAIJCgsE FgIDAQIeAQIXgBYhBJvQfg4MUfjVlne3VBuTQ307QWKbBQJoF1BKBQkWlnSaAAoJEBuTQ307 QWKbHukP/3t4tRp/bvDnxJfmNdNVn0gv9ep3L39IntPalBFwRKytqeQkzAju0whYWg+R/rwp +r2I1Fzwt7+PTjsnMFlh1AZxGDmP5MFkzVsMnfX1lGiXhYSOMP97XL6R1QSXxaWOpGNCDaUl ajorB0lJDcC0q3xAdwzRConxYVhlgmTrRiD8oLlSCD5baEAt5Zw17UTNDnDGmZQKR0fqLpWy 786Lm5OScb7DjEgcA2PRm17st4UQ1kF0rQHokVaotxRM74PPDB8bCsunlghJl1DRK9s1aSuN hL1Pv9VD8b4dFNvCo7b4hfAANPU67W40AaaGZ3UAfmw+1MYyo4QuAZGKzaP2ukbdCD/DYnqi tJy88XqWtyb4UQWKNoQqGKzlYXdKsldYqrLHGoMvj1UN9XcRtXHST/IaLn72o7j7/h/Ac5EL 8lSUVIG4TYn59NyxxAXa07Wi6zjVL1U11fTnFmE29ALYQEXKBI3KUO1A3p4sQWzU7uRmbuxn naUmm8RbpMcOfa9JjlXCLmQ5IP7Rr5tYZUCkZz08LIfF8UMXwH7OOEX87Y++EkAB+pzKZNNd hwoXulTAgjSy+OiaLtuCys9VdXLZ3Zy314azaCU3BoWgaMV0eAW/+gprWMXQM1lrlzvwlD/k whyy9wGf0AEPpLssLVt9VVxNjo6BIkt6d1pMg6mHsUEVzsFNBFVDXDQBEADNkrQYSREUL4D3 Gws46JEoZ9HEQOKtkrwjrzlw/tCmqVzERRPvz2Xg8n7+HRCrgqnodIYoUh5WsU84N03KlLue MNsWLJBvBaubYN4JuJIdRr4dS4oyF1/fQAQPHh8Thpiz0SAZFx6iWKB7Qrz3OrGCjTPcW6ei OMheesVS5hxietSmlin+SilmIAPZHx7n242u6kdHOh+/SyLImKn/dh9RzatVpUKbv34eP1wA GldWsRxbf3WP9pFNObSzI/Bo3kA89Xx2rO2roC+Gq4LeHvo7ptzcLcrqaHUAcZ3CgFG88CnA 6z6lBZn0WyewEcPOPdcUB2Q7D/NiUY+HDiV99rAYPJztjeTrBSTnHeSBPb+qn5ZZGQwIdUW9 YegxWKvXXHTwB5eMzo/RB6vffwqcnHDoe0q7VgzRRZJwpi6aMIXLfeWZ5Wrwaw2zldFuO4Dt 91pFzBSOIpeMtfgb/Pfe/a1WJ/GgaIRIBE+NUqckM+3zJHGmVPqJP/h2Iwv6nw8U+7Yyl6gU BLHFTg2hYnLFJI4Xjg+AX1hHFVKmvl3VBHIsBv0oDcsQWXqY+NaFahT0lRPjYtrTa1v3tem/ JoFzZ4B0p27K+qQCF2R96hVvuEyjzBmdq2esyE6zIqftdo4MOJho8uctOiWbwNNq2U9pPWmu 4vXVFBYIGmpyNPYzRm0QPwARAQABwsF8BBgBCgAmAhsMFiEEm9B+DgxR+NWWd7dUG5NDfTtB YpsFAmgXUF8FCRaWWyoACgkQG5NDfTtBYptO0w//dlXJs5/42hAXKsk+PDg3wyEFb4NpyA1v qmx7SfAzk9Hf6lWwU1O6AbqNMbh6PjEwadKUk1m04S7EjdQLsj/MBSgoQtCT3MDmWUUtHZd5 RYIPnPq3WVB47GtuO6/u375tsxhtf7vt95QSYJwCB+ZUgo4T+FV4hquZ4AsRkbgavtIzQisg Dgv76tnEv3YHV8Jn9mi/Bu0FURF+5kpdMfgo1sq6RXNQ//TVf8yFgRtTUdXxW/qHjlYURrm2 H4kutobVEIxiyu6m05q3e9eZB/TaMMNVORx+1kM3j7f0rwtEYUFzY1ygQfpcMDPl7pRYoJjB dSsm0ZuzDaCwaxg2t8hqQJBzJCezTOIkjHUsWAK+tEbU4Z4SnNpCyM3fBqsgYdJxjyC/tWVT AQ18NRLtPw7tK1rdcwCl0GFQHwSwk5pDpz1NH40e6lU+NcXSeiqkDDRkHlftKPV/dV+lQXiu jWt87ecuHlpL3uuQ0ZZNWqHgZoQLXoqC2ZV5KrtKWb/jyiFX/sxSrodALf0zf+tfHv0FZWT2 zHjUqd0t4njD/UOsuIMOQn4Ig0SdivYPfZukb5cdasKJukG1NOpbW7yRNivaCnfZz6dTawXw XRIV/KDsHQiyVxKvN73bThKhONkcX2LWuD928tAR6XMM2G5ovxLe09vuOzzfTWQDsm++9UKF a/A= In-Reply-To: <20260310153506.5181-2-fmancera@suse.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/03/2026 16:34, Fernando Fernandez Mancera wrote: > Maintaining a modular IPv6 stack offers image size and memory savings > for specific setups, this benefit is outweighed by the architectural > burden it imposes on the subsystems on implementation and maintenance. > Therefore, drop it. > > Change CONFIG_IPV6 from tristate to bool. Remove all Kconfig > dependencies across the tree that explicitly checked for IPV6=m. In > addition, remove MODULE_DESCRIPTION(), MODULE_ALIAS(), MODULE_AUTHOR() > and MODULE_LICENSE(). > > This is also replacing module_init() by device_initcall(). It is not > possible to use fs_initcall() as IPv4 does because that creates a race > condition on IPv6 addrconf. > > Finally, modify the default configs from CONFIG_IPV6=m to CONFIG_IPV6=y > except for m68k as according to the bloat-o-meter the image is > increasing by 330KB~ and that isn't acceptable. Instead, disable IPv6 on > this architecture by default. This is aligned with m68k RAM requirements > and recommendations [1]. > > [1] http://www.linux-m68k.org/faq/ram.html > > Signed-off-by: Fernando Fernandez Mancera > --- > v2: updated m68k default configuration to CONFIG_IPV6=n and used > device_initcall() instead fs_initcall() to avoid a race condition. Don't know exavtly netdev policy about merging cover letters, but if the cover letter does not end up merged (e.g. with b4), then please move other bloatometer stats here. Although the best if cover letter is simply merged. > --- > arch/arm64/configs/defconfig | 2 +- Acked-by: Krzysztof Kozlowski # arm64 > arch/m68k/configs/amiga_defconfig | 45 +------------------- > arch/m68k/configs/apollo_defconfig | 46 +------------------- > arch/m68k/configs/atari_defconfig | 45 +------------------- > arch/m68k/configs/bvme6000_defconfig | 45 +------------------- > arch/m68k/configs/hp300_defconfig | 47 +-------------------- > arch/m68k/configs/mac_defconfig | 45 +------------------- > arch/m68k/configs/multi_defconfig | 45 +------------------- > arch/m68k/configs/mvme147_defconfig | 45 +------------------- > arch/m68k/configs/mvme16x_defconfig | 45 +------------------- > arch/m68k/configs/q40_defconfig | 45 +------------------- > arch/m68k/configs/sun3_defconfig | 45 +------------------- > arch/m68k/configs/sun3x_defconfig | 45 +------------------- Thanks Fernando for addressing the comments. Great job! Best regards, Krzysztof