1849 static int check_unshare_flags(unsigned long unshare_flags)  in check_unshare_flags()  argument
1851 	if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND|  in check_unshare_flags()
1862 	if (unshare_flags & (CLONE_THREAD | CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
1866 	if (unshare_flags & (CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
1870 	if (unshare_flags & CLONE_VM) {  in check_unshare_flags()
1881 static int unshare_fs(unsigned long unshare_flags, struct fs_struct **new_fsp)  in unshare_fs()  argument
1885 	if (!(unshare_flags & CLONE_FS) || !fs)  in unshare_fs()
1902 static int unshare_fd(unsigned long unshare_flags, struct files_struct **new_fdp)  in unshare_fd()  argument
1907 	if ((unshare_flags & CLONE_FILES) &&  in unshare_fd()
1925 SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)  in SYSCALL_DEFINE1()  argument
1937 	if (unshare_flags & CLONE_NEWUSER)  in SYSCALL_DEFINE1()
1938 		unshare_flags |= CLONE_THREAD | CLONE_FS;  in SYSCALL_DEFINE1()
1942 	if (unshare_flags & CLONE_VM)  in SYSCALL_DEFINE1()
1943 		unshare_flags |= CLONE_SIGHAND;  in SYSCALL_DEFINE1()
1947 	if (unshare_flags & CLONE_SIGHAND)  in SYSCALL_DEFINE1()
1948 		unshare_flags |= CLONE_THREAD;  in SYSCALL_DEFINE1()
1952 	if (unshare_flags & CLONE_NEWNS)  in SYSCALL_DEFINE1()
1953 		unshare_flags |= CLONE_FS;  in SYSCALL_DEFINE1()
1955 	err = check_unshare_flags(unshare_flags);  in SYSCALL_DEFINE1()
1963 	if (unshare_flags & (CLONE_NEWIPC|CLONE_SYSVSEM))  in SYSCALL_DEFINE1()
1965 	err = unshare_fs(unshare_flags, &new_fs);  in SYSCALL_DEFINE1()
1968 	err = unshare_fd(unshare_flags, &new_fd);  in SYSCALL_DEFINE1()
1971 	err = unshare_userns(unshare_flags, &new_cred);  in SYSCALL_DEFINE1()
1974 	err = unshare_nsproxy_namespaces(unshare_flags, &new_nsproxy,  in SYSCALL_DEFINE1()
1986 		if (unshare_flags & CLONE_NEWIPC) {  in SYSCALL_DEFINE1()