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Sun, 12 Jul 2026 01:41:54 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id kEcJKeLwUmqRegAAD6G6ig (envelope-from ); Sun, 12 Jul 2026 01:41:54 +0000 From: Fernando Fernandez Mancera To: netdev@vger.kernel.org Cc: davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, dsahern@kernel.org, horms@kernel.org, idosch@nvidia.com, Fernando Fernandez Mancera , Eric Biggers , Ard Biesheuvel , Dmitry Safonov <0x7f454c46@gmail.com>, linux-kernel@vger.kernel.org Subject: [PATCH 13/13 RFC net-next] net: ipv4: make CONFIG_IPV4 boolean Date: Sun, 12 Jul 2026 03:39:11 +0200 Message-ID: <20260712013941.4570-14-fmancera@suse.de> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260712013941.4570-1-fmancera@suse.de> References: <20260712013941.4570-1-fmancera@suse.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Flag: NO X-Spam-Score: -6.80 X-Spamd-Result: default: False [-6.80 / 50.00]; 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This allows users to explicitly disable IPv4 via Kconfig to build IPv6-only or pure L2 kernel network stack. The default is kept at 'y' to prevent breaking existing configurations. Signed-off-by: Fernando Fernandez Mancera --- net/ipv4/Kconfig | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/net/ipv4/Kconfig b/net/ipv4/Kconfig index 51bf05d9770c..fa30cc407223 100644 --- a/net/ipv4/Kconfig +++ b/net/ipv4/Kconfig @@ -3,7 +3,15 @@ # IP configuration # config IPV4 - def_bool y + bool "The IPv4 protocol" + default y + help + Support for IP version 4 (IPv4). + + Disabling this option compiles the kernel networking stack without + IPv4 support, resulting in a IPv6-only or pure L2 system. + + If unsure, say Y. config IP_MULTICAST bool "IP: multicasting" -- 2.54.0