1880 static int check_unshare_flags(unsigned long unshare_flags)  in check_unshare_flags()  argument
1882 	if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND|  in check_unshare_flags()
1893 	if (unshare_flags & (CLONE_THREAD | CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
1897 	if (unshare_flags & (CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
1901 	if (unshare_flags & CLONE_VM) {  in check_unshare_flags()
1912 static int unshare_fs(unsigned long unshare_flags, struct fs_struct **new_fsp)  in unshare_fs()  argument
1916 	if (!(unshare_flags & CLONE_FS) || !fs)  in unshare_fs()
1933 static int unshare_fd(unsigned long unshare_flags, struct files_struct **new_fdp)  in unshare_fd()  argument
1938 	if ((unshare_flags & CLONE_FILES) &&  in unshare_fd()
1956 SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)  in SYSCALL_DEFINE1()  argument
1969 	if (unshare_flags & CLONE_NEWUSER)  in SYSCALL_DEFINE1()
1970 		unshare_flags |= CLONE_THREAD | CLONE_FS;  in SYSCALL_DEFINE1()
1974 	if (unshare_flags & CLONE_VM)  in SYSCALL_DEFINE1()
1975 		unshare_flags |= CLONE_SIGHAND;  in SYSCALL_DEFINE1()
1979 	if (unshare_flags & CLONE_SIGHAND)  in SYSCALL_DEFINE1()
1980 		unshare_flags |= CLONE_THREAD;  in SYSCALL_DEFINE1()
1984 	if (unshare_flags & CLONE_NEWNS)  in SYSCALL_DEFINE1()
1985 		unshare_flags |= CLONE_FS;  in SYSCALL_DEFINE1()
1987 	err = check_unshare_flags(unshare_flags);  in SYSCALL_DEFINE1()
1995 	if (unshare_flags & (CLONE_NEWIPC|CLONE_SYSVSEM))  in SYSCALL_DEFINE1()
1997 	err = unshare_fs(unshare_flags, &new_fs);  in SYSCALL_DEFINE1()
2000 	err = unshare_fd(unshare_flags, &new_fd);  in SYSCALL_DEFINE1()
2003 	err = unshare_userns(unshare_flags, &new_cred);  in SYSCALL_DEFINE1()
2006 	err = unshare_nsproxy_namespaces(unshare_flags, &new_nsproxy,  in SYSCALL_DEFINE1()
2018 		if (unshare_flags & CLONE_NEWIPC) {  in SYSCALL_DEFINE1()