tree:   https://github.com/ammarfaizi2/linux-block akpm/mm/mm-unstable
head:   da4b5585bc49f2538482b9e383f4165e5a31d8a0
commit: bdb6231e88a3f675e33ed422d2f0b6d02ad4b159 [16/32] mm/memfd: add MFD_NOEXEC_SEAL and MFD_EXEC
config: riscv-randconfig-r011-20221215
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 98b13979fb05f3ed288a900deb843e7b27589e58)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/ammarfaizi2/linux-block/commit/bdb6231e88a3f675e33ed422d2f0b6d02ad4b159
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block akpm/mm/mm-unstable
        git checkout bdb6231e88a3f675e33ed422d2f0b6d02ad4b159
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

>> kernel/pid_namespace.c:114:2: error: call to undeclared function 'initialize_memfd_noexec_scope'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           initialize_memfd_noexec_scope(ns);
           ^
   kernel/pid_namespace.c:114:2: note: did you mean 'set_memfd_noexec_scope'?
   kernel/pid_sysctl.h:55:20: note: 'set_memfd_noexec_scope' declared here
   static inline void set_memfd_noexec_scope(struct pid_namespace *ns) {}
                      ^
>> kernel/pid_namespace.c:462:2: error: call to undeclared function 'register_pid_ns_sysctl_table_vm'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
           register_pid_ns_sysctl_table_vm();
           ^
   kernel/pid_namespace.c:462:2: note: did you mean 'register_pid_ns_ctl_table_vm'?
   kernel/pid_sysctl.h:56:20: note: 'register_pid_ns_ctl_table_vm' declared here
   static inline void register_pid_ns_ctl_table_vm(void) {}
                      ^
   2 errors generated.


vim +/initialize_memfd_noexec_scope +114 kernel/pid_namespace.c

    71	
    72	static struct pid_namespace *create_pid_namespace(struct user_namespace *user_ns,
    73		struct pid_namespace *parent_pid_ns)
    74	{
    75		struct pid_namespace *ns;
    76		unsigned int level = parent_pid_ns->level + 1;
    77		struct ucounts *ucounts;
    78		int err;
    79	
    80		err = -EINVAL;
    81		if (!in_userns(parent_pid_ns->user_ns, user_ns))
    82			goto out;
    83	
    84		err = -ENOSPC;
    85		if (level > MAX_PID_NS_LEVEL)
    86			goto out;
    87		ucounts = inc_pid_namespaces(user_ns);
    88		if (!ucounts)
    89			goto out;
    90	
    91		err = -ENOMEM;
    92		ns = kmem_cache_zalloc(pid_ns_cachep, GFP_KERNEL);
    93		if (ns == NULL)
    94			goto out_dec;
    95	
    96		idr_init(&ns->idr);
    97	
    98		ns->pid_cachep = create_pid_cachep(level);
    99		if (ns->pid_cachep == NULL)
   100			goto out_free_idr;
   101	
   102		err = ns_alloc_inum(&ns->ns);
   103		if (err)
   104			goto out_free_idr;
   105		ns->ns.ops = &pidns_operations;
   106	
   107		refcount_set(&ns->ns.count, 1);
   108		ns->level = level;
   109		ns->parent = get_pid_ns(parent_pid_ns);
   110		ns->user_ns = get_user_ns(user_ns);
   111		ns->ucounts = ucounts;
   112		ns->pid_allocated = PIDNS_ADDING;
   113	
 > 114		initialize_memfd_noexec_scope(ns);
   115	
   116		return ns;
   117	
   118	out_free_idr:
   119		idr_destroy(&ns->idr);
   120		kmem_cache_free(pid_ns_cachep, ns);
   121	out_dec:
   122		dec_pid_namespaces(ucounts);
   123	out:
   124		return ERR_PTR(err);
   125	}
   126	

-- 
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https://01.org/lkp