linux-kernel - Re: [DRAFT 1/2] mm/cpuset: Exclude CDM nodes from each task's mems

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Date:   Thu, 17 Nov 2016 16:28:57 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Anshuman Khandual <khandual@...ux.vnet.ibm.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, mhocko@...e.com, js1304@...il.com,
        vbabka@...e.cz, mgorman@...e.de, minchan@...nel.org,
        akpm@...ux-foundation.org, aneesh.kumar@...ux.vnet.ibm.com,
        bsingharora@...il.com
Subject: Re: [DRAFT 1/2] mm/cpuset: Exclude CDM nodes from each task's
 mems_allowed node mask

Hi Anshuman,

[auto build test ERROR on mmotm/master]
[also build test ERROR on v4.9-rc5 next-20161117]
[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/Anshuman-Khandual/mm-cpuset-Exclude-CDM-nodes-from-each-task-s-mems_allowed-node-mask/20161117-160736
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: i386-tinyconfig (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   In file included from include/linux/mmzone.h:16:0,
                    from include/linux/gfp.h:5,
                    from include/linux/slab.h:14,
                    from include/linux/crypto.h:24,
                    from arch/x86/kernel/asm-offsets.c:8:
   include/linux/mm.h: In function 'system_ram':
>> include/linux/mm.h:454:61: error: 'N_COHERENT_DEVICE' undeclared (first use in this function)
     nodes_andnot(ram_nodes, node_states[N_MEMORY], node_states[N_COHERENT_DEVICE]);
                                                                ^
   include/linux/nodemask.h:176:38: note: in definition of macro 'nodes_andnot'
       __nodes_andnot(&(dst), &(src1), &(src2), MAX_NUMNODES)
                                         ^~~~
   include/linux/mm.h:454:61: note: each undeclared identifier is reported only once for each function it appears in
     nodes_andnot(ram_nodes, node_states[N_MEMORY], node_states[N_COHERENT_DEVICE]);
                                                                ^
   include/linux/nodemask.h:176:38: note: in definition of macro 'nodes_andnot'
       __nodes_andnot(&(dst), &(src1), &(src2), MAX_NUMNODES)
                                         ^~~~
   make[2]: *** [arch/x86/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 +/N_COHERENT_DEVICE +454 include/linux/mm.h

   448	
   449	static inline nodemask_t system_ram(void)
   450	{
   451		nodemask_t ram_nodes;
   452	
   453		nodes_clear(ram_nodes);
 > 454		nodes_andnot(ram_nodes, node_states[N_MEMORY], node_states[N_COHERENT_DEVICE]);
   455		return ram_nodes;
   456	}
   457	

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