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Hallyn" , Vikas Gupta , Bhargava Marreddy , Rajashekar Hudumula , Nicolai Buchwitz , =?UTF-8?Q?Markus_Bl=C3=B6chl?= , Arnd Bergmann , Heiner Kallweit , Florian Fainelli , Krzysztof Kozlowski , Qingfang Deng , Julian Braha , Ethan Nelson-Moore , Greg Kroah-Hartman , Eric Biggers , Ard Biesheuvel , Neal Cardwell , Kuniyuki Iwashima , Willem de Bruijn , Alyssa Ross , Joel Granados , Oleg Nesterov , linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org, intel-wired-lan@lists.osuosl.org, oss-drivers@corigine.com, linux-net-drivers@amd.com, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, linux-wireless@vger.kernel.org, brcm80211@lists.linux.dev, brcm80211-dev-list.pdl@broadcom.com, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-afs@lists.infradead.org, linux-nfs@vger.kernel.org, b.a.t.m.a.n@lists.open-mesh.org, bridge@lists.linux.dev, netfilter-devel@vger.kernel.org, coreteam@netfilter.org, mptcp@lists.linux.dev, lvs-devel@vger.kernel.org, dev@openvswitch.org, rds-devel@oss.oracle.com, linux-sctp@vger.kernel.org, linux-s390@vger.kernel.org, tipc-discussion@lists.sourceforge.net, linux-security-module@vger.kernel.org References: <20260910144914.8025-1-fmancera@suse.de> <20260910144914.8025-2-fmancera@suse.de> Content-Language: en-US From: Fernando Fernandez Mancera In-Reply-To: <20260910144914.8025-2-fmancera@suse.de> Content-Type: text/plain; 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SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; FROM_HAS_DN(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; MIME_TRACE(0.00)[0:+]; FREEMAIL_CC(0.00)[kernel.org,redhat.com,google.com,davemloft.net,ziepe.ca,lunn.ch,intel.com,marvell.com,nvidia.com,gmail.com,bootlin.com,foss.st.com,broadcom.com,kernel.dk,lst.de,grimberg.me,HansenPartnership.com,chelsio.com,zeniv.linux.org.uk,suse.cz,auristor.com,brown.name,oracle.com,talpey.com,mailbox.org,simonwunderlich.de,mandelbit.com,narfation.org,blackwall.org,netfilter.org,strlen.de,nwl.cc,sipsolutions.net,ssi.bg,ovn.org,mojatatu.com,resnulli.us,linux.alibaba.com,linux.ibm.com,est.tech,secunet.com,gondor.apana.org.au,schaufler-ca.com,paul-moore.com,namei.org,hallyn.com,tipi-net.de,blochl.de,arndb.de,linux.dev,linuxfoundation.org,alyssa.is,vger.kernel.org,lists.osuosl.org,corigine.com,amd.com,st-md-mailman.stormreply.com,lists.infradead.org,lists.linux.dev,lists.open-mesh.org,openvswitch.org,oss.oracle.com,lists.sourceforge.net]; ARC_NA(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; RCVD_TLS_ALL(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLdey6otz8cz7qhffota9ydd97)]; TO_DN_SOME(0.00)[]; TO_MATCH_ENVRCPT_SOME(0.00)[]; DNSWL_BLOCKED(0.00)[2a07:de40:b281:106:10:150:64:167:received]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; DKIM_TRACE(0.00)[suse.de:+]; RCPT_COUNT_GT_50(0.00)[133]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; MID_RHS_MATCH_FROM(0.00)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; TAGGED_RCPT(0.00)[netdev]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:rdns,imap1.dmz-prg2.suse.org:helo,suse.de:dkim,suse.de:email,suse.de:mid] X-Spam-Flag: NO X-Spam-Score: -1.01 On 9/10/26 4:48 PM, Fernando Fernandez Mancera wrote: > Historically, the IPv4 protocol has been linked to the core INET > subsystem. Because shared infrastructure like the TCP/UDP engine, > routing or INET hashtables live inside net/ipv4/, it has been impossible > to compile a kernel with only IPv6 support. > > This patch introduces the CONFIG_IPV4 Kconfig symbol, which is set to > 'def_bool y' for now. This does not allow to completely disable the > IPv4 stack yet but it lays the necessary build-system work for that > goal. > > In addition, multiple subsystems Kconfig symbols across networking > features like tunnels, drivers and filesystems have been adjusted to > depend on IPv4. Keep on mind that follow-up work is required to convert > the Kconfig symbol to bool and remove the dependency on IPv4 where it > makes sense. > > Signed-off-by: Fernando Fernandez Mancera FWIW, I just checked and the following symbols that are currently marked as "depends on IPV4" can already be compiled without IPV4: IPV6_MIP6, IPV6_ILA and IPV6_MROUTE They will be adjusted on the next revision of the series. A re-check for all the symbols will be performed. Thanks, Fernando.