Hi Byungchul,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.13-rc4 next-20170807]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Byungchul-Park/lockdep-Implement-crossrelease-feature/20170807-172617
config: alpha-allmodconfig (attached as .config)
compiler: alpha-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=alpha 

All errors (new ones prefixed by >>):

   warning: (LOCKDEP_COMPLETE && LOCKDEP_PAGELOCK) selects LOCKDEP_CROSSRELEASE which has unmet direct dependencies (PROVE_LOCKING)
   warning: (LOCKDEP_COMPLETE && LOCKDEP_PAGELOCK) selects LOCKDEP_CROSSRELEASE which has unmet direct dependencies (PROVE_LOCKING)
   In file included from include/linux/srcutree.h:28:0,
                    from include/linux/srcu.h:62,
                    from include/linux/notifier.h:15,
                    from include/linux/memory_hotplug.h:6,
                    from include/linux/mmzone.h:771,
                    from include/linux/gfp.h:5,
                    from include/linux/mm.h:9,
                    from include/linux/pid_namespace.h:6,
                    from include/linux/ptrace.h:9,
                    from arch/alpha/kernel/asm-offsets.c:10:
   include/linux/completion.h:32:27: error: field 'map' has incomplete type
     struct lockdep_map_cross map;
                              ^~~
   In file included from include/linux/mm.h:23:0,
                    from include/linux/pid_namespace.h:6,
                    from include/linux/ptrace.h:9,
                    from arch/alpha/kernel/asm-offsets.c:10:
>> include/linux/page_ext.h:49:27: error: field 'map' has incomplete type
     struct lockdep_map_cross map;
                              ^~~
   make[2]: *** [arch/alpha/kernel/asm-offsets.s] Error 1
   make[2]: Target '__build' not remade because of errors.
   make[1]: *** [prepare0] Error 2
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [sub-make] Error 2

vim +/map +49 include/linux/page_ext.h

    37	
    38	/*
    39	 * Page Extension can be considered as an extended mem_map.
    40	 * A page_ext page is associated with every page descriptor. The
    41	 * page_ext helps us add more information about the page.
    42	 * All page_ext are allocated at boot or memory hotplug event,
    43	 * then the page_ext for pfn always exists.
    44	 */
    45	struct page_ext {
    46		unsigned long flags;
    47	
    48	#ifdef CONFIG_LOCKDEP_PAGELOCK
  > 49		struct lockdep_map_cross map;
    50	#endif
    51	};
    52	

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