arch/riscv/kernel/entry.S:78: Error: unrecognized opcode `alternative("sfence.vma", "nop",0,86,1)'
arch/riscv/kernel/entry.S:446: Error: unrecognized opcode `alternative(".dword do_trap_insn_fault", ".dword sifive_cip_453_insn_fault_trp",0x489,0,1)'
arch/riscv/kernel/entry.S:458: Error: unrecognized opcode `alternative(".dword do_page_fault", ".dword sifive_cip_453_page_fault_trp",0x489,0,1)'