Using -Oline -j 72 W=1 C=1 redirect to /tmp/tmp.dApVYZIC1c and /tmp/tmp.MsGrf8JvKZ
CC=ccache gcc
gcc (GCC) 14.2.1 20240912 (Red Hat 14.2.1-3)
Tree base:
f8d4bc455047 ("net/sched: netem: account for backlog updates from child qdisc")
Baseline building the tree
make[1]: Entering directory '/home/nipa/net/wt-0/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net/wt-0/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net/wt-0/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net/wt-0/build_allmodconfig_warn subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CC      net/unix/af_unix.o
  CHECK   ../net/unix/af_unix.c
  AR      net/unix/built-in.a
  CC [M]  drivers/net/dsa/ocelot/felix_vsc9959.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_main.o
  CHECK   ../drivers/net/dsa/ocelot/felix_vsc9959.c
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_nic.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_pci_func.o
  LD [M]  drivers/net/dsa/ocelot/mscc_felix.o
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_vec.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_ring.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_hw_utils.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_ethtool.o
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_main.c
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_drvinfo.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_filters.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.o
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
  CC [M]  drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.o
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_nic.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_vec.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_ring.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_hw_utils.c
  CC [M]  drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2.o
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_ethtool.c
  CC [M]  drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.o
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_drvinfo.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_filters.c
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_macsec.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/aq_ptp.o
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils_fw2x.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/hw_atl2/hw_atl2_utils_fw.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_macsec.c
  CHECK   ../drivers/net/ethernet/aquantia/atlantic/aq_ptp.c
  CC [M]  net/sched/sch_netem.o
  LD [M]  drivers/net/ethernet/aquantia/atlantic/atlantic.o
  CHECK   ../net/sched/sch_netem.c
  AR      net/built-in.a
  CC [M]  net/batman-adv/translation-table.o
  CHECK   ../net/batman-adv/translation-table.c
  LD [M]  net/batman-adv/batman-adv.o
  CC [M]  drivers/net/ethernet/microsoft/mana/gdma_main.o
  CC [M]  drivers/net/usb/qmi_wwan.o
  CHECK   ../drivers/net/ethernet/microsoft/mana/gdma_main.c
  CHECK   ../drivers/net/usb/qmi_wwan.c
  LD [M]  drivers/net/ethernet/microsoft/mana/mana.o
  CC [M]  drivers/net/ethernet/renesas/rswitch.o
  CHECK   ../drivers/net/ethernet/renesas/rswitch.c
  AR      built-in.a
  AR      vmlinux.a
  LD      vmlinux.o
  OBJCOPY modules.builtin.modinfo
  GEN     modules.builtin
  MODPOST Module.symvers
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  CHECK   ../init/version-timestamp.c
  KSYMS   .tmp_vmlinux0.kallsyms.S
  AS      .tmp_vmlinux0.kallsyms.o
  LD      .tmp_vmlinux1
  NM      .tmp_vmlinux1.syms
  KSYMS   .tmp_vmlinux1.kallsyms.S
  AS      .tmp_vmlinux1.kallsyms.o
  LD      .tmp_vmlinux2
  NM      .tmp_vmlinux2.syms
  KSYMS   .tmp_vmlinux2.kallsyms.S
  AS      .tmp_vmlinux2.kallsyms.o
  LD      vmlinux
  CC [M]  drivers/net/dsa/ocelot/mscc_felix.mod.o
  CC [M]  drivers/net/ethernet/aquantia/atlantic/atlantic.mod.o
  CC [M]  drivers/net/ethernet/microsoft/mana/mana.mod.o
  CC [M]  drivers/net/ethernet/renesas/rswitch.mod.o
  CC [M]  drivers/net/usb/qmi_wwan.mod.o
  NM      System.map
  SORTTAB vmlinux
  LD [M]  drivers/net/dsa/ocelot/mscc_felix.ko
  RELOCS  arch/x86/boot/compressed/vmlinux.relocs
  LD [M]  drivers/net/ethernet/aquantia/atlantic/atlantic.ko
  LD [M]  drivers/net/ethernet/microsoft/mana/mana.ko
  LD [M]  drivers/net/ethernet/renesas/rswitch.ko
  LD [M]  drivers/net/usb/qmi_wwan.ko
  CC [M]  net/sched/sch_netem.mod.o
  LD [M]  net/sched/sch_netem.ko
  CC [M]  net/batman-adv/batman-adv.mod.o
  LD [M]  net/batman-adv/batman-adv.ko
  RSTRIP  vmlinux
  GEN     modules.builtin.ranges
  CC      arch/x86/boot/version.o
  CHECK   ../arch/x86/boot/version.c
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
  VOFFSET arch/x86/boot/compressed/../voffset.h
  CC      arch/x86/boot/compressed/misc.o
  CHECK   ../arch/x86/boot/compressed/misc.c
  CC      arch/x86/boot/compressed/kaslr.o
  CHECK   ../arch/x86/boot/compressed/kaslr.c
  GZIP    arch/x86/boot/compressed/vmlinux.bin.gz
  MKPIGGY arch/x86/boot/compressed/piggy.S
  AS      arch/x86/boot/compressed/piggy.o
  LD      arch/x86/boot/compressed/vmlinux
  ZOFFSET arch/x86/boot/zoffset.h
  OBJCOPY arch/x86/boot/vmlinux.bin
  AS      arch/x86/boot/header.o
  LD      arch/x86/boot/setup.elf
  OBJCOPY arch/x86/boot/setup.bin
  BUILD   arch/x86/boot/bzImage
Kernel: arch/x86/boot/bzImage is ready  (#541)
Building the tree before the patch
make[1]: Entering directory '/home/nipa/net/wt-0/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net/wt-0/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net/wt-0/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net/wt-0/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]  drivers/net/ethernet/renesas/rswitch.o
  CHECK   ../drivers/net/ethernet/renesas/rswitch.c
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#541)
  CC [M]  drivers/net/ethernet/renesas/rswitch.mod.o
  LD [M]  drivers/net/ethernet/renesas/rswitch.ko
Building the tree with the patch
make[1]: Entering directory '/home/nipa/net/wt-0/build_allmodconfig_warn'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net/wt-0/build_allmodconfig_warn'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net/wt-0/build_allmodconfig_warn/tools/objtool && make O=/home/nipa/net/wt-0/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]  drivers/net/ethernet/renesas/rswitch.o
  CHECK   ../drivers/net/ethernet/renesas/rswitch.c
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#541)
  CC [M]  drivers/net/ethernet/renesas/rswitch.mod.o
  LD [M]  drivers/net/ethernet/renesas/rswitch.ko