Using -Oline -j 72 W=1 C=1 redirect to /tmp/tmp.jdcScZsQ2c and /tmp/tmp.8vZGSV6mEs
CC=ccache gcc
gcc (GCC) 13.2.1 20230918 (Red Hat 13.2.1-3)
Tree base:
4604f99390fa ("netlink: specs: add ethnl PHY_GET command set")
Baseline building the tree
make[1]: Entering directory '/home/nipa/net-next/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net-next/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      net/ethtool/plca.o
  CHECK   ../net/ethtool/plca.c
  AR      net/ethtool/built-in.a
  AR      net/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     .vmlinux.objs
  MODPOST Module.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  CHECK   ../init/version-timestamp.c
  LD      .tmp_vmlinux.kallsyms1
Building the tree before the patch
make[1]: Entering directory '/home/nipa/net-next/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net-next/build_allmodconfig_warn subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CC      net/ethtool/plca.o
  CHECK   ../net/ethtool/plca.c
  AR      net/ethtool/built-in.a
  CHK     kernel/kheaders_data.tar.xz
  AR      net/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     .vmlinux.objs
  MODPOST Module.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  CHECK   ../init/version-timestamp.c
  LD      .tmp_vmlinux.kallsyms1
Building the tree with the patch
make[1]: Entering directory '/home/nipa/net-next/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net-next/build_allmodconfig_warn subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CC      net/ethtool/plca.o
  CHECK   ../net/ethtool/plca.c
  AR      net/ethtool/built-in.a
  CHK     kernel/kheaders_data.tar.xz
  AR      net/built-in.a
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  GEN     .vmlinux.objs
  MODPOST Module.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  CHECK   ../init/version-timestamp.c
  LD      .tmp_vmlinux.kallsyms1