Using -Oline -j 72 W=1 C=1 redirect to /tmp/tmp.lIbavhOPL8 and /tmp/tmp.HA2XBn6JH8
CC=ccache gcc
gcc (GCC) 15.1.1 20250521 (Red Hat 15.1.1-2)
Tree base:
dd500e4aecf2 ("net: usb: Remove duplicate assignments for net->pcpu_stat_type")
Baseline building the tree
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
  DESCEND objtool
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  drivers/net/ethernet/intel/igb/igb_xsk.o
  CC [M]  drivers/net/netdevsim/netdev.o
  CC [M]  drivers/net/netdevsim/ethtool.o
  CC [M]  drivers/net/netdevsim/fib.o
  CC [M]  drivers/net/netdevsim/bus.o
  CC [M]  drivers/net/netdevsim/health.o
  CC [M]  drivers/net/netdevsim/hwstats.o
  CC [M]  drivers/net/netdevsim/udp_tunnels.o
  CC [M]  drivers/net/netdevsim/bpf.o
  CC [M]  drivers/net/netdevsim/ipsec.o
  CC [M]  drivers/net/netdevsim/psample.o
  CC [M]  drivers/net/netdevsim/macsec.o
  CHECK   ../drivers/net/ethernet/intel/igb/igb_xsk.c
  CC [M]  drivers/net/ethernet/stmicro/stmmac/stmmac_main.o
  LD [M]  drivers/net/ethernet/intel/igb/igb.o
  CHECK   ../drivers/net/netdevsim/bus.c
  CHECK   ../drivers/net/netdevsim/ethtool.c
  CHECK   ../drivers/net/netdevsim/bpf.c
  CHECK   ../drivers/net/netdevsim/hwstats.c
  CHECK   ../drivers/net/netdevsim/macsec.c
  CHECK   ../drivers/net/netdevsim/health.c
  CHECK   ../drivers/net/netdevsim/netdev.c
  CHECK   ../drivers/net/netdevsim/udp_tunnels.c
  CHECK   ../drivers/net/netdevsim/psample.c
  CHECK   ../drivers/net/netdevsim/ipsec.c
  CHECK   ../drivers/net/netdevsim/fib.c
  CHECK   ../drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
  LD [M]  drivers/net/ethernet/stmicro/stmmac/stmmac.o
  CC [M]  drivers/net/netdevsim/dev.o
  CC [M]  drivers/net/usb/usbnet.o
  CHECK   ../drivers/net/netdevsim/dev.c
  LD [M]  drivers/net/netdevsim/netdevsim.o
  CHECK   ../drivers/net/usb/usbnet.c
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#4270)
  CC [M]  drivers/net/ethernet/intel/igb/igb.mod.o
  CC [M]  drivers/net/ethernet/stmicro/stmmac/stmmac.mod.o
  CC [M]  drivers/net/usb/usbnet.mod.o
  CC [M]  drivers/net/netdevsim/netdevsim.mod.o
  LD [M]  drivers/net/ethernet/intel/igb/igb.ko
  LD [M]  drivers/net/ethernet/stmicro/stmmac/stmmac.ko
  LD [M]  drivers/net/usb/usbnet.ko
  LD [M]  drivers/net/netdevsim/netdevsim.ko
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
  DESCEND objtool
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  drivers/net/netdevsim/netdev.o
  CC [M]  drivers/net/netdevsim/dev.o
  CC [M]  drivers/net/netdevsim/ethtool.o
  CC [M]  drivers/net/netdevsim/fib.o
  CC [M]  drivers/net/netdevsim/bus.o
  CC [M]  drivers/net/netdevsim/health.o
  CC [M]  drivers/net/netdevsim/hwstats.o
  CC [M]  drivers/net/netdevsim/udp_tunnels.o
  CC [M]  drivers/net/netdevsim/bpf.o
  CC [M]  drivers/net/netdevsim/ipsec.o
  CC [M]  drivers/net/netdevsim/psample.o
  CC [M]  drivers/net/netdevsim/macsec.o
  CHECK   ../drivers/net/netdevsim/dev.c
  CHECK   ../drivers/net/netdevsim/bus.c
  CHECK   ../drivers/net/netdevsim/health.c
  CHECK   ../drivers/net/netdevsim/netdev.c
  CHECK   ../drivers/net/netdevsim/hwstats.c
  CHECK   ../drivers/net/netdevsim/udp_tunnels.c
  CHECK   ../drivers/net/netdevsim/psample.c
  CHECK   ../drivers/net/netdevsim/macsec.c
  CHECK   ../drivers/net/netdevsim/ipsec.c
  CHECK   ../drivers/net/netdevsim/bpf.c
  CHECK   ../drivers/net/netdevsim/ethtool.c
  CHECK   ../drivers/net/netdevsim/fib.c
  LD [M]  drivers/net/netdevsim/netdevsim.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#4270)
  CC [M]  drivers/net/netdevsim/netdevsim.mod.o
  LD [M]  drivers/net/netdevsim/netdevsim.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
  DESCEND objtool
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  drivers/net/netdevsim/netdev.o
  CC [M]  drivers/net/netdevsim/dev.o
  CC [M]  drivers/net/netdevsim/ethtool.o
  CC [M]  drivers/net/netdevsim/fib.o
  CC [M]  drivers/net/netdevsim/bus.o
  CC [M]  drivers/net/netdevsim/health.o
  CC [M]  drivers/net/netdevsim/hwstats.o
  CC [M]  drivers/net/netdevsim/udp_tunnels.o
  CC [M]  drivers/net/netdevsim/bpf.o
  CC [M]  drivers/net/netdevsim/ipsec.o
  CC [M]  drivers/net/netdevsim/psample.o
  CC [M]  drivers/net/netdevsim/macsec.o
  CHECK   ../drivers/net/netdevsim/dev.c
  CHECK   ../drivers/net/netdevsim/health.c
  CHECK   ../drivers/net/netdevsim/hwstats.c
  CHECK   ../drivers/net/netdevsim/macsec.c
  CHECK   ../drivers/net/netdevsim/bpf.c
  CHECK   ../drivers/net/netdevsim/psample.c
  CHECK   ../drivers/net/netdevsim/netdev.c
  CHECK   ../drivers/net/netdevsim/ethtool.c
  CHECK   ../drivers/net/netdevsim/ipsec.c
  CHECK   ../drivers/net/netdevsim/fib.c
  CHECK   ../drivers/net/netdevsim/bus.c
  CHECK   ../drivers/net/netdevsim/udp_tunnels.c
  LD [M]  drivers/net/netdevsim/netdevsim.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#4270)
  CC [M]  drivers/net/netdevsim/netdevsim.mod.o
  LD [M]  drivers/net/netdevsim/netdevsim.ko