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Thu, 10 Sep 2026 14:50:59 +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 wEv2FtPDomogZwAAD6G6ig (envelope-from ); Thu, 10 Sep 2026 14:50:59 +0000 From: Fernando Fernandez Mancera To: netdev@vger.kernel.org Cc: horms@kernel.org, kuba@kernel.org, pabeni@redhat.com, edumazet@google.com, davem@davemloft.net, Fernando Fernandez Mancera , Eric Biggers , Ard Biesheuvel , linux-kernel@vger.kernel.org Subject: [PATCH 13/13 net-next] net: ipv4: make CONFIG_IPV4 boolean Date: Thu, 10 Sep 2026 16:48:38 +0200 Message-ID: <20260910144914.8025-14-fmancera@suse.de> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260910144914.8025-1-fmancera@suse.de> References: <20260910144914.8025-1-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-Score: -6.80 X-Spam-Level: X-Spamd-Result: default: False [-6.80 / 50.00]; REPLY(-4.00)[]; BAYES_HAM(-3.00)[100.00%]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-0.997]; MIME_GOOD(-0.10)[text/plain]; RCVD_COUNT_TWO(0.00)[2]; FROM_HAS_DN(0.00)[]; ARC_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:email,imap1.dmz-prg2.suse.org:helo]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FROM_EQ_ENVFROM(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLrr9ek4ud4f4qwi71m7motjzt)]; RCPT_COUNT_SEVEN(0.00)[10]; RCVD_TLS_ALL(0.00)[] X-Spam-Flag: NO Change CONFIG_IPV4 from hidden 'def_bool y' into an exposed boolean. This allows users to explicitly disable IPv4 via Kconfig to build IPv6-only. The default is kept at 'INET' 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..c7d36cfa4a1d 100644 --- a/net/ipv4/Kconfig +++ b/net/ipv4/Kconfig @@ -3,7 +3,15 @@ # IP configuration # config IPV4 - def_bool y + bool "The IPv4 protocol" if IPV6 + default INET + help + Support for IP version 4 (IPv4). + + Disabling this option compiles the kernel networking stack without + IPv4 support, resulting in a IPv6-only system. + + If unsure, say Y. config IP_MULTICAST bool "IP: multicasting" -- 2.55.0