compat_start_thread
#define compat_start_thread compat_start_thread
void compat_start_thread(struct pt_regs *regs, u32 new_ip, u32 new_sp, bool x32);
compat_start_thread(regs, new_ip, new_sp, ex->e_machine == EM_X86_64)
#ifdef compat_start_thread
compat_start_thread(regs, new_ip, new_sp)