Using -Oline -j 72 W=1 redirect to /tmp/tmp.r3UotMbpqq and /tmp/tmp.12mpW093DR
LLVM=1 cc=clang
clang version 18.1.1 (Fedora 18.1.1-1.fc40)
Tree base:
934c29999b57 ("net: micro-optimize skb_datagram_iter")
Baseline building the tree
make[1]: Entering directory '/home/nipa/net-next/wt-1/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-1/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-1/build_clang/tools/objtool && make O=/home/nipa/net-next/wt-1/build_clang 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/microchip/sparx5/sparx5_vcap_ag_api.o
  CC      drivers/net/ethernet/microchip/vcap/vcap_tc.o
  CC      drivers/net/ethernet/microchip/vcap/vcap_api_debugfs.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_mqprio.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_vlan.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_main.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_fdb.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_phylink.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_lag.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_cbs.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_tc.o
  CC [M]  drivers/net/ethernet/microchip/sparx5/sparx5_vcap_debugfs.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_mac.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_switchdev.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_port.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_mdb.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_vcap_ag_api.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_ptp.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_ets.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_fdma.o
  CC [M]  drivers/net/ethernet/microchip/sparx5/sparx5_tc_matchall.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_tc_matchall.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_taprio.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_police.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_xdp.o
  CC [M]  net/bluetooth/hci_event.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_goto.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_tbf.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_mirror.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_vcap_debugfs.o
  CC [M]  drivers/net/ethernet/microchip/sparx5/sparx5_vcap_impl.o
  CC [M]  drivers/net/ethernet/microchip/sparx5/sparx5_tc_flower.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_tc_flower.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_dcb.o
  LD [M]  net/bluetooth/bluetooth.o
  LD [M]  drivers/net/ethernet/microchip/sparx5/sparx5-switch.o
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.o
  LD [M]  drivers/net/ethernet/microchip/lan966x/lan966x-switch.o
  CC      drivers/net/ethernet/microchip/vcap/vcap_api.o
  AR      drivers/net/ethernet/microchip/vcap/built-in.a
  AR      drivers/net/ethernet/microchip/built-in.a
  AR      drivers/net/ethernet/built-in.a
  AR      drivers/net/built-in.a
  AR      drivers/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
  CC      .vmlinux.export.o
  UPD     include/generated/utsversion.h
  CC      init/version-timestamp.o
  LD      .tmp_vmlinux.kallsyms1
  NM      .tmp_vmlinux.kallsyms1.syms
  KSYMS   .tmp_vmlinux.kallsyms1.S
  AS      .tmp_vmlinux.kallsyms1.o
  LD      .tmp_vmlinux.kallsyms2
  NM      .tmp_vmlinux.kallsyms2.syms
  KSYMS   .tmp_vmlinux.kallsyms2.S
  AS      .tmp_vmlinux.kallsyms2.o
  LD      vmlinux
  NM      System.map
  SORTTAB vmlinux
  RELOCS  arch/x86/boot/compressed/vmlinux.relocs
  RSTRIP  vmlinux
  CC      arch/x86/boot/version.o
  OBJCOPY arch/x86/boot/compressed/vmlinux.bin
  CC      arch/x86/boot/compressed/kaslr.o
  VOFFSET arch/x86/boot/compressed/../voffset.h
  CC      arch/x86/boot/compressed/misc.o
  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  (#2934)
  CC [M]  drivers/net/ethernet/microchip/lan966x/lan966x-switch.mod.o
  CC [M]  drivers/net/ethernet/microchip/sparx5/sparx5-switch.mod.o
  LD [M]  drivers/net/ethernet/microchip/lan966x/lan966x-switch.ko
  LD [M]  drivers/net/ethernet/microchip/sparx5/sparx5-switch.ko
  CC [M]  net/bluetooth/bluetooth.mod.o
  LD [M]  net/bluetooth/bluetooth.ko
Building the tree before the patch
make[1]: Entering directory '/home/nipa/net-next/wt-1/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-1/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-1/build_clang/tools/objtool && make O=/home/nipa/net-next/wt-1/build_clang subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  net/bluetooth/hci_event.o
  LD [M]  net/bluetooth/bluetooth.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2934)
  CC [M]  net/bluetooth/bluetooth.mod.o
  LD [M]  net/bluetooth/bluetooth.ko
Building the tree with the patch
make[1]: Entering directory '/home/nipa/net-next/wt-1/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-1/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-1/build_clang/tools/objtool && make O=/home/nipa/net-next/wt-1/build_clang subdir=tools/objtool --no-print-directory -C objtool 
  INSTALL libsubcmd_headers
  CALL    ../scripts/checksyscalls.sh
  CHK     kernel/kheaders_data.tar.xz
  CC [M]  net/bluetooth/hci_event.o
  LD [M]  net/bluetooth/bluetooth.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2934)
  CC [M]  net/bluetooth/bluetooth.mod.o
  LD [M]  net/bluetooth/bluetooth.ko