asmlinkage int sys_fork(struct pt_regs *regs);
asmlinkage int sys_vfork(struct pt_regs *regs);
asmlinkage int sys_pipe(unsigned long *fildes);
-asmlinkage int sys_ptrace(long request, long pid, long addr, long data);
struct sigaction;
asmlinkage long sys_rt_sigaction(int sig,
const struct sigaction __user *act,