bpf_jit_charge_modmem
int bpf_jit_charge_modmem(u32 size);
err = bpf_jit_charge_modmem(PAGE_SIZE);
if (bpf_jit_charge_modmem(size))
if (bpf_jit_charge_modmem(size))
err = bpf_jit_charge_modmem(size);