[linux-next:master 6791/7915] arch/mips/kernel/mips-mt.c:233:19: error: conflicting types for 'mt_init'; have 'int(void)'

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   d4a0ae62a277377de396850ed4b709b6bd9b7326
commit: 37f4270132af31dd08a209799d420f72bfddb49c [6791/7915] mm: Start tracking VMAs with maple tree
config: mips-allyesconfig (https://download.01.org/0day-ci/archive/20220224/202202241817.MXoE0NcM-lkp@xxxxxxxxx/config)
compiler: mips-linux-gcc (GCC) 11.2.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=37f4270132af31dd08a209799d420f72bfddb49c
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 37f4270132af31dd08a209799d420f72bfddb49c
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   arch/mips/kernel/mips-mt.c:50:6: warning: no previous prototype for 'mips_mt_regdump' [-Wmissing-prototypes]
      50 | void mips_mt_regdump(unsigned long mvpctl)
         |      ^~~~~~~~~~~~~~~
   arch/mips/kernel/mips-mt.c:159:6: warning: no previous prototype for 'mips_mt_set_cpuoptions' [-Wmissing-prototypes]
     159 | void mips_mt_set_cpuoptions(void)
         |      ^~~~~~~~~~~~~~~~~~~~~~
>> arch/mips/kernel/mips-mt.c:233:19: error: conflicting types for 'mt_init'; have 'int(void)'
     233 | static int __init mt_init(void)
         |                   ^~~~~~~
   In file included from include/linux/mm_types.h:12,
                    from include/linux/mmzone.h:21,
                    from include/linux/gfp.h:6,
                    from include/linux/radix-tree.h:12,
                    from include/linux/idr.h:15,
                    from include/linux/kernfs.h:12,
                    from include/linux/sysfs.h:16,
                    from include/linux/kobject.h:20,
                    from include/linux/energy_model.h:7,
                    from include/linux/device.h:16,
                    from arch/mips/kernel/mips-mt.c:7:
   include/linux/maple_tree.h:589:20: note: previous definition of 'mt_init' with type 'void(struct maple_tree *)'
     589 | static inline void mt_init(struct maple_tree *mt)
         |                    ^~~~~~~


vim +233 arch/mips/kernel/mips-mt.c

27a3bbaf4b1e23 Ralf Baechle 2007-02-07  232  
27a3bbaf4b1e23 Ralf Baechle 2007-02-07 @233  static int __init mt_init(void)
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  234  {
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  235  	struct class *mtc;
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  236  
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  237  	mtc = class_create(THIS_MODULE, "mt");
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  238  	if (IS_ERR(mtc))
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  239  		return PTR_ERR(mtc);
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  240  
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  241  	mt_class = mtc;
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  242  
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  243  	return 0;
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  244  }
27a3bbaf4b1e23 Ralf Baechle 2007-02-07  245  

:::::: The code at line 233 was first introduced by commit
:::::: 27a3bbaf4b1e23a3afbae4d9f72b51a36859f74a [MIPS] VPE: Sprinkle device model code into code to make udev happier.

:::::: TO: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
:::::: CC: Ralf Baechle <ralf@xxxxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx




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