unsigned long sys_sigreturn(struct pt_regs *);
/* kernel/sys_i386_32.c */
-struct mmap_arg_struct;
struct oldold_utsname;
struct old_utsname;
-asmlinkage int old_mmap(struct mmap_arg_struct __user *);
asmlinkage int sys_ipc(uint, int, int, int, void __user *, long);
asmlinkage int sys_uname(struct old_utsname __user *);
asmlinkage int sys_olduname(struct oldold_utsname __user *);