2118 static int check_unshare_flags(unsigned long unshare_flags)  in check_unshare_flags()  argument
2120 	if (unshare_flags & ~(CLONE_THREAD|CLONE_FS|CLONE_NEWNS|CLONE_SIGHAND|  in check_unshare_flags()
2131 	if (unshare_flags & (CLONE_THREAD | CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
2135 	if (unshare_flags & (CLONE_SIGHAND | CLONE_VM)) {  in check_unshare_flags()
2139 	if (unshare_flags & CLONE_VM) {  in check_unshare_flags()
2150 static int unshare_fs(unsigned long unshare_flags, struct fs_struct **new_fsp)  in unshare_fs()  argument
2154 	if (!(unshare_flags & CLONE_FS) || !fs)  in unshare_fs()
2171 static int unshare_fd(unsigned long unshare_flags, struct files_struct **new_fdp)  in unshare_fd()  argument
2176 	if ((unshare_flags & CLONE_FILES) &&  in unshare_fd()
2194 SYSCALL_DEFINE1(unshare, unsigned long, unshare_flags)  in SYSCALL_DEFINE1()  argument
2207 	if (unshare_flags & CLONE_NEWUSER)  in SYSCALL_DEFINE1()
2208 		unshare_flags |= CLONE_THREAD | CLONE_FS;  in SYSCALL_DEFINE1()
2212 	if (unshare_flags & CLONE_VM)  in SYSCALL_DEFINE1()
2213 		unshare_flags |= CLONE_SIGHAND;  in SYSCALL_DEFINE1()
2217 	if (unshare_flags & CLONE_SIGHAND)  in SYSCALL_DEFINE1()
2218 		unshare_flags |= CLONE_THREAD;  in SYSCALL_DEFINE1()
2222 	if (unshare_flags & CLONE_NEWNS)  in SYSCALL_DEFINE1()
2223 		unshare_flags |= CLONE_FS;  in SYSCALL_DEFINE1()
2225 	err = check_unshare_flags(unshare_flags);  in SYSCALL_DEFINE1()
2233 	if (unshare_flags & (CLONE_NEWIPC|CLONE_SYSVSEM))  in SYSCALL_DEFINE1()
2235 	err = unshare_fs(unshare_flags, &new_fs);  in SYSCALL_DEFINE1()
2238 	err = unshare_fd(unshare_flags, &new_fd);  in SYSCALL_DEFINE1()
2241 	err = unshare_userns(unshare_flags, &new_cred);  in SYSCALL_DEFINE1()
2244 	err = unshare_nsproxy_namespaces(unshare_flags, &new_nsproxy,  in SYSCALL_DEFINE1()
2256 		if (unshare_flags & CLONE_NEWIPC) {  in SYSCALL_DEFINE1()