BPF_JIT_SCRATCH_REGS
#define SCRATCH_SIZE (BPF_JIT_SCRATCH_REGS * 4)
stack_adjust += BPF_JIT_SCRATCH_REGS * REG_SIZE;
emit(hppa_ldo(-REG_SIZE * (NR_SAVED_REGISTERS + BPF_JIT_SCRATCH_REGS),
stack_adjust += BPF_JIT_SCRATCH_REGS * sizeof(u32);