Using -Oline -j 72 W=1 C=1 redirect to /tmp/tmp.cfFnRHGBa5 and /tmp/tmp.E8m6W8BShg
CC=ccache gcc
gcc (GCC) 14.2.1 20240912 (Red Hat 14.2.1-3)
Tree base:
c4385dc7a7cb ("net: ip_tunnel: Use link netns in newlink() of rtnl_link_ops")
Skip baseline build, not the first patch and no Kconfig updates
Building the tree before the patch
make[1]: Entering directory '/home/nipa/net-next/wt-1/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-1/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-1/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net-next/wt-1/build_allmodconfig_warn subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CC [M]  net/ipv6/ip6_vti.o
  CC [M]  net/ipv6/sit.o
  CC [M]  net/ipv6/ip6_tunnel.o
  CC [M]  net/ipv6/ip6_gre.o
  CHK     kernel/kheaders_data.tar.xz
  CHECK   ../net/ipv6/ip6_gre.c
  CHECK   ../net/ipv6/ip6_vti.c
  CHECK   ../net/ipv6/sit.c
  CHECK   ../net/ipv6/ip6_tunnel.c
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2870)
  LD [M]  net/ipv6/ip6_vti.ko
  LD [M]  net/ipv6/sit.ko
  LD [M]  net/ipv6/ip6_tunnel.ko
  LD [M]  net/ipv6/ip6_gre.ko
Building the tree with the patch
make[1]: Entering directory '/home/nipa/net-next/wt-1/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-1/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-1/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net-next/wt-1/build_allmodconfig_warn subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  net/ipv6/ip6_vti.o
  CC [M]  net/ipv6/sit.o
  CHECK   ../net/ipv6/ip6_vti.c
  CC [M]  net/ipv6/ip6_gre.o
  CHECK   ../net/ipv6/sit.c
  CC [M]  net/ipv6/ip6_tunnel.o
  CHECK   ../net/ipv6/ip6_gre.c
  CHECK   ../net/ipv6/ip6_tunnel.c
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2870)
  CC [M]  net/ipv6/ip6_vti.mod.o
  LD [M]  net/ipv6/ip6_vti.ko
  CC [M]  net/ipv6/ip6_tunnel.mod.o
  CC [M]  net/ipv6/ip6_gre.mod.o
  LD [M]  net/ipv6/ip6_tunnel.ko
  LD [M]  net/ipv6/ip6_gre.ko
  CC [M]  net/ipv6/sit.mod.o
  LD [M]  net/ipv6/sit.ko