Using -Oline -j 72 W=1 redirect to /tmp/tmp.nLumbVmv4C and /tmp/tmp.w4VxaMJPAO
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-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-0/build_clang/tools/objtool && make O=/home/nipa/net-next/wt-0/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/renesas/ravb_ptp.o
  CC [M]  drivers/net/ethernet/renesas/ravb_main.o
  LD [M]  drivers/net/ethernet/renesas/ravb.o
  CC [M]  drivers/net/ethernet/stmicro/stmmac/stmmac_main.o
  LD [M]  drivers/net/ethernet/stmicro/stmmac/stmmac.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2836)
  CC [M]  drivers/net/ethernet/renesas/ravb.mod.o
  CC [M]  drivers/net/ethernet/stmicro/stmmac/stmmac.mod.o
  LD [M]  drivers/net/ethernet/renesas/ravb.ko
  LD [M]  drivers/net/ethernet/stmicro/stmmac/stmmac.ko
Building the tree before the patch
make[1]: Entering directory '/home/nipa/net-next/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-0/build_clang/tools/objtool && make O=/home/nipa/net-next/wt-0/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/renesas/ravb_ptp.o
  CC [M]  drivers/net/ethernet/renesas/ravb_main.o
  LD [M]  drivers/net/ethernet/renesas/ravb.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2836)
  CC [M]  drivers/net/ethernet/renesas/ravb.mod.o
  LD [M]  drivers/net/ethernet/renesas/ravb.ko
Building the tree with the patch
make[1]: Entering directory '/home/nipa/net-next/wt-0/build_clang'
  GEN     Makefile
#
# configuration written to .config
#
make[1]: Leaving directory '/home/nipa/net-next/wt-0/build_clang'
  SYNC    include/config/auto.conf
  GEN     Makefile
  GEN     Makefile
mkdir -p /home/nipa/net-next/wt-0/build_clang/tools/objtool && make O=/home/nipa/net-next/wt-0/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/renesas/ravb_ptp.o
  CC [M]  drivers/net/ethernet/renesas/ravb_main.o
  LD [M]  drivers/net/ethernet/renesas/ravb.o
  MODPOST Module.symvers
Kernel: arch/x86/boot/bzImage is ready  (#2836)
  CC [M]  drivers/net/ethernet/renesas/ravb.mod.o
  LD [M]  drivers/net/ethernet/renesas/ravb.ko