[hch-misc:nvme-pr-fix 4/5] drivers/nvme/host/core.c:1647:8: error: implicit declaration of function 'nvme_find_path'

[hch-misc:nvme-pr-fix 4/5] drivers/nvme/host/core.c:1647:8: error: implicit declaration of function 'nvme_find_path'

[kernel test robot]

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tree:   git://git.infradead.org/users/hch/misc.git nvme-pr-fix
head:   d5eadfcdbeb0e4f09c22b02955b587321c6300b1
commit: b0e4e1fe3d0665fdd93e9d1f84ab52f24bb8dae8 [4/5] nvme: factor out a is_multipath_disk helper
config: x86_64-randconfig-r033-20200816 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project ab9fc8bae805c785066779e76e7846aabad5609e)
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 x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        git checkout b0e4e1fe3d0665fdd93e9d1f84ab52f24bb8dae8
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All error/warnings (new ones prefixed by >>):

>> drivers/nvme/host/core.c:1647:8: error: implicit declaration of function 'nvme_find_path' [-Werror,-Wimplicit-function-declaration]
                   ns = nvme_find_path(*head);
                        ^
>> drivers/nvme/host/core.c:1647:6: warning: incompatible integer to pointer conversion assigning to 'struct nvme_ns *' from 'int' [-Wint-conversion]
                   ns = nvme_find_path(*head);
                      ^ ~~~~~~~~~~~~~~~~~~~~~
   1 warning and 1 error generated.

vim +/nvme_find_path +1647 drivers/nvme/host/core.c

b0e4e1fe3d0665 Christoph Hellwig 2020-08-14  1634  
32acab3181c705 Christoph Hellwig 2017-11-02  1635  /*
32acab3181c705 Christoph Hellwig 2017-11-02  1636   * Issue ioctl requests on the first available path.  Note that unlike normal
32acab3181c705 Christoph Hellwig 2017-11-02  1637   * block layer requests we will not retry failed request on another controller.
32acab3181c705 Christoph Hellwig 2017-11-02  1638   */
240e6ee272c07a Keith Busch       2020-06-29  1639  struct nvme_ns *nvme_get_ns_from_disk(struct gendisk *disk,
32acab3181c705 Christoph Hellwig 2017-11-02  1640  		struct nvme_ns_head **head, int *srcu_idx)
1673f1f08c8876 Christoph Hellwig 2015-11-26  1641  {
b0e4e1fe3d0665 Christoph Hellwig 2020-08-14  1642  	if (is_multipath_disk(disk)) {
100c815cbd5648 Christoph Hellwig 2019-05-17  1643  		struct nvme_ns *ns;
100c815cbd5648 Christoph Hellwig 2019-05-17  1644  
32acab3181c705 Christoph Hellwig 2017-11-02  1645  		*head = disk->private_data;
32acab3181c705 Christoph Hellwig 2017-11-02  1646  		*srcu_idx = srcu_read_lock(&(*head)->srcu);
100c815cbd5648 Christoph Hellwig 2019-05-17 @1647  		ns = nvme_find_path(*head);
100c815cbd5648 Christoph Hellwig 2019-05-17  1648  		if (!ns)
100c815cbd5648 Christoph Hellwig 2019-05-17  1649  			srcu_read_unlock(&(*head)->srcu, *srcu_idx);
100c815cbd5648 Christoph Hellwig 2019-05-17  1650  		return ns;
32acab3181c705 Christoph Hellwig 2017-11-02  1651  	}
b0e4e1fe3d0665 Christoph Hellwig 2020-08-14  1652  
32acab3181c705 Christoph Hellwig 2017-11-02  1653  	*head = NULL;
32acab3181c705 Christoph Hellwig 2017-11-02  1654  	*srcu_idx = -1;
32acab3181c705 Christoph Hellwig 2017-11-02  1655  	return disk->private_data;
32acab3181c705 Christoph Hellwig 2017-11-02  1656  }
1673f1f08c8876 Christoph Hellwig 2015-11-26  1657  

:::::: The code at line 1647 was first introduced by commit
:::::: 100c815cbd56480b3e31518475b04719c363614a nvme: fix srcu locking on error return in nvme_get_ns_from_disk

:::::: TO: Christoph Hellwig <hch@lst.de>
:::::: CC: Keith Busch <keith.busch@intel.com>

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

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