前序步骤一切正常，没有任何报错，但是到了 make zImage -j4 时，出现以下错误
CHK include/config/kernel.release
WRAP arch/arm/include/generated/asm/bitsperlong.h
WRAP arch/arm/include/generated/asm/clkdev.h
WRAP arch/arm/include/generated/asm/cputime.h
WRAP arch/arm/include/generated/asm/current.h
WRAP arch/arm/include/generated/asm/early_ioremap.h
WRAP arch/arm/include/generated/asm/emergency-restart.h
WRAP arch/arm/include/generated/asm/errno.h
WRAP arch/arm/include/generated/asm/exec.h
WRAP arch/arm/include/generated/asm/ioctl.h
WRAP arch/arm/include/generated/asm/ipcbuf.h
UPD include/config/kernel.release
WRAP arch/arm/include/generated/asm/irq_regs.h
CHK include/generated/uapi/linux/version.h
WRAP arch/arm/include/generated/asm/kdebug.h
UPD include/generated/uapi/linux/version.h
WRAP arch/arm/include/generated/asm/local.h
WRAP arch/arm/include/generated/asm/local64.h
WRAP arch/arm/include/generated/asm/mm-arch-hooks.h
WRAP arch/arm/include/generated/asm/msgbuf.h
WRAP arch/arm/include/generated/asm/msi.h
WRAP arch/arm/include/generated/asm/param.h
WRAP arch/arm/include/generated/asm/parport.h
WRAP arch/arm/include/generated/asm/poll.h
WRAP arch/arm/include/generated/asm/preempt.h
WRAP arch/arm/include/generated/asm/resource.h
WRAP arch/arm/include/generated/asm/rwsem.h
WRAP arch/arm/include/generated/asm/seccomp.h
WRAP arch/arm/include/generated/asm/segment.h
WRAP arch/arm/include/generated/asm/sembuf.h
WRAP arch/arm/include/generated/asm/serial.h
WRAP arch/arm/include/generated/asm/shmbuf.h
WRAP arch/arm/include/generated/asm/siginfo.h
WRAP arch/arm/include/generated/asm/simd.h
WRAP arch/arm/include/generated/asm/sizes.h
WRAP arch/arm/include/generated/asm/sockios.h
WRAP arch/arm/include/generated/asm/socket.h
WRAP arch/arm/include/generated/asm/termbits.h
WRAP arch/arm/include/generated/asm/termios.h
HOSTCC scripts/basic/bin2c
WRAP arch/arm/include/generated/asm/timex.h
WRAP arch/arm/include/generated/asm/trace_clock.h
CHK include/generated/utsrelease.h
UPD include/generated/utsrelease.h
GEN include/generated/mach-types.h
HOSTCC scripts/genksyms/genksyms.o
HOSTCC scripts/dtc/dtc.o
CC scripts/mod/empty.o
CC kernel/bounds.s
HOSTCC scripts/mod/mk_elfconfig
CHK include/generated/timeconst.h
UPD include/generated/timeconst.h
CHK include/generated/bounds.h
UPD include/generated/bounds.h
CC arch/arm/kernel/asm-offsets.s
HOSTCC scripts/dtc/flattree.o
CC scripts/mod/devicetable-offsets.s
MKELF scripts/mod/elfconfig.h
GEN scripts/mod/devicetable-offsets.h
HOSTCC scripts/mod/sumversion.o
SHIPPED scripts/genksyms/parse.tab.c
SHIPPED scripts/genksyms/lex.lex.c
SHIPPED scripts/genksyms/keywords.hash.c
SHIPPED scripts/genksyms/parse.tab.h
HOSTCC scripts/genksyms/parse.tab.o
HOSTCC scripts/mod/modpost.o
CHK include/generated/asm-offsets.h
UPD include/generated/asm-offsets.h
CALL scripts/checksyscalls.sh
HOSTCC scripts/dtc/fstree.o
HOSTCC scripts/genksyms/lex.lex.o
HOSTCC scripts/dtc/data.o
HOSTCC scripts/dtc/livetree.o
HOSTCC scripts/dtc/treesource.o
HOSTCC scripts/mod/file2alias.o
HOSTCC scripts/dtc/srcpos.o
HOSTLD scripts/genksyms/genksyms
HOSTCC scripts/kallsyms
HOSTCC scripts/dtc/checks.o
HOSTCC scripts/dtc/util.o
SHIPPED scripts/dtc/dtc-lexer.lex.c
SHIPPED scripts/dtc/dtc-parser.tab.h
SHIPPED scripts/dtc/dtc-parser.tab.c
HOSTCC scripts/pnmtologo
HOSTCC scripts/conmakehash
HOSTCC scripts/dtc/dtc-lexer.lex.o
HOSTCC scripts/recordmcount
HOSTCC scripts/sortextable
HOSTLD scripts/mod/modpost
HOSTCC scripts/asn1_compiler
HOSTCC scripts/dtc/dtc-parser.tab.o
HOSTLD scripts/dtc/dtc
/usr/bin/ld: scripts/dtc/dtc-parser.tab.o:(.bss+0x10): multiple definition of `yylloc'; scripts/dtc/dtc-lexer.lex.o:(.bss+0x0): first defined here
collect2: error: ld returned 1 exit status
make[2]: *** [scripts/Makefile.host:116: scripts/dtc/dtc] Error 1
make[1]: *** [scripts/Makefile.build:544: scripts/dtc] Error 2
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:557: scripts] Error 2
实在不知道该怎么搞了，请老师帮助
ps：我没有用老师给的环境，是自己装的Ubuntu20.04。交叉编译器什么的都没有问题。