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* [mcgrof-next:20210708-block-fixes-v2 61/89] drivers/md/md.c:9592:42: error: passing argument 3 of '__register_blkdev' from incompatible pointer type
@ 2021-07-25 10:05 kernel test robot
  0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2021-07-25 10:05 UTC (permalink / raw)
  To: Luis Chamberlain; +Cc: kbuild-all, linux-kernel

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git 20210708-block-fixes-v2
head:   db0174e39de7dc941f158ce53ee3af95b1635b62
commit: b253de076cda99b4968dd20b1a9702de24376152 [61/89] block: make __register_blkdev() return an error
config: arc-allyesconfig (attached as .config)
compiler: arceb-elf-gcc (GCC) 10.3.0
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/mcgrof/linux-next.git/commit/?id=b253de076cda99b4968dd20b1a9702de24376152
        git remote add mcgrof-next https://git.kernel.org/pub/scm/linux/kernel/git/mcgrof/linux-next.git
        git fetch --no-tags mcgrof-next 20210708-block-fixes-v2
        git checkout b253de076cda99b4968dd20b1a9702de24376152
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross ARCH=arc 

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

All errors (new ones prefixed by >>):

   drivers/md/md.c: In function 'md_init':
>> drivers/md/md.c:9592:42: error: passing argument 3 of '__register_blkdev' from incompatible pointer type [-Werror=incompatible-pointer-types]
    9592 |  ret = __register_blkdev(MD_MAJOR, "md", md_probe);
         |                                          ^~~~~~~~
         |                                          |
         |                                          void (*)(dev_t) {aka void (*)(unsigned int)}
   In file included from include/linux/blkdev.h:8,
                    from drivers/md/md.c:43:
   include/linux/genhd.h:315:9: note: expected 'int (*)(dev_t)' {aka 'int (*)(unsigned int)'} but argument is of type 'void (*)(dev_t)' {aka 'void (*)(unsigned int)'}
     315 |   int (*probe)(dev_t devt));
         |   ~~~~~~^~~~~~~~~~~~~~~~~~
   drivers/md/md.c:9596:36: error: passing argument 3 of '__register_blkdev' from incompatible pointer type [-Werror=incompatible-pointer-types]
    9596 |  ret = __register_blkdev(0, "mdp", md_probe);
         |                                    ^~~~~~~~
         |                                    |
         |                                    void (*)(dev_t) {aka void (*)(unsigned int)}
   In file included from include/linux/blkdev.h:8,
                    from drivers/md/md.c:43:
   include/linux/genhd.h:315:9: note: expected 'int (*)(dev_t)' {aka 'int (*)(unsigned int)'} but argument is of type 'void (*)(dev_t)' {aka 'void (*)(unsigned int)'}
     315 |   int (*probe)(dev_t devt));
         |   ~~~~~~^~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/__register_blkdev +9592 drivers/md/md.c

^1da177e4c3f41 Linus Torvalds    2005-04-16  9575  
75c96f85845a67 Adrian Bunk       2005-05-05  9576  static int __init md_init(void)
^1da177e4c3f41 Linus Torvalds    2005-04-16  9577  {
e804ac780e2f01 Tejun Heo         2010-10-15  9578  	int ret = -ENOMEM;
e804ac780e2f01 Tejun Heo         2010-10-15  9579  
ada609ee2ac2e0 Tejun Heo         2011-01-25  9580  	md_wq = alloc_workqueue("md", WQ_MEM_RECLAIM, 0);
e804ac780e2f01 Tejun Heo         2010-10-15  9581  	if (!md_wq)
e804ac780e2f01 Tejun Heo         2010-10-15  9582  		goto err_wq;
e804ac780e2f01 Tejun Heo         2010-10-15  9583  
e804ac780e2f01 Tejun Heo         2010-10-15  9584  	md_misc_wq = alloc_workqueue("md_misc", 0, 0);
e804ac780e2f01 Tejun Heo         2010-10-15  9585  	if (!md_misc_wq)
e804ac780e2f01 Tejun Heo         2010-10-15  9586  		goto err_misc_wq;
e804ac780e2f01 Tejun Heo         2010-10-15  9587  
cc1ffe61c026e2 Guoqing Jiang     2020-04-04  9588  	md_rdev_misc_wq = alloc_workqueue("md_rdev_misc", 0, 0);
cf0b9b4821a295 Guoqing Jiang     2020-10-08  9589  	if (!md_rdev_misc_wq)
cc1ffe61c026e2 Guoqing Jiang     2020-04-04  9590  		goto err_rdev_misc_wq;
cc1ffe61c026e2 Guoqing Jiang     2020-04-04  9591  
28144f9998e047 Christoph Hellwig 2020-10-29 @9592  	ret = __register_blkdev(MD_MAJOR, "md", md_probe);
28144f9998e047 Christoph Hellwig 2020-10-29  9593  	if (ret < 0)
e804ac780e2f01 Tejun Heo         2010-10-15  9594  		goto err_md;
e804ac780e2f01 Tejun Heo         2010-10-15  9595  
28144f9998e047 Christoph Hellwig 2020-10-29  9596  	ret = __register_blkdev(0, "mdp", md_probe);
28144f9998e047 Christoph Hellwig 2020-10-29  9597  	if (ret < 0)
e804ac780e2f01 Tejun Heo         2010-10-15  9598  		goto err_mdp;
e804ac780e2f01 Tejun Heo         2010-10-15  9599  	mdp_major = ret;
e804ac780e2f01 Tejun Heo         2010-10-15  9600  
^1da177e4c3f41 Linus Torvalds    2005-04-16  9601  	register_reboot_notifier(&md_notifier);
0b4d414714f0d2 Eric W. Biederman 2007-02-14  9602  	raid_table_header = register_sysctl_table(raid_root_table);
^1da177e4c3f41 Linus Torvalds    2005-04-16  9603  
^1da177e4c3f41 Linus Torvalds    2005-04-16  9604  	md_geninit();
d710e138126000 NeilBrown         2008-10-13  9605  	return 0;
^1da177e4c3f41 Linus Torvalds    2005-04-16  9606  
e804ac780e2f01 Tejun Heo         2010-10-15  9607  err_mdp:
e804ac780e2f01 Tejun Heo         2010-10-15  9608  	unregister_blkdev(MD_MAJOR, "md");
e804ac780e2f01 Tejun Heo         2010-10-15  9609  err_md:
cc1ffe61c026e2 Guoqing Jiang     2020-04-04  9610  	destroy_workqueue(md_rdev_misc_wq);
cc1ffe61c026e2 Guoqing Jiang     2020-04-04  9611  err_rdev_misc_wq:
e804ac780e2f01 Tejun Heo         2010-10-15  9612  	destroy_workqueue(md_misc_wq);
e804ac780e2f01 Tejun Heo         2010-10-15  9613  err_misc_wq:
e804ac780e2f01 Tejun Heo         2010-10-15  9614  	destroy_workqueue(md_wq);
e804ac780e2f01 Tejun Heo         2010-10-15  9615  err_wq:
e804ac780e2f01 Tejun Heo         2010-10-15  9616  	return ret;
e804ac780e2f01 Tejun Heo         2010-10-15  9617  }
^1da177e4c3f41 Linus Torvalds    2005-04-16  9618  

:::::: The code at line 9592 was first introduced by commit
:::::: 28144f9998e047a9bac31421914335c6bc6eaa67 md: use __register_blkdev to allocate devices on demand

:::::: TO: Christoph Hellwig <hch@lst.de>
:::::: CC: Jens Axboe <axboe@kernel.dk>

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

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2021-07-25 10:05 [mcgrof-next:20210708-block-fixes-v2 61/89] drivers/md/md.c:9592:42: error: passing argument 3 of '__register_blkdev' from incompatible pointer type kernel test robot

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