linux-kernel - [cxl:preview 34/53] drivers/cxl/cxl.h:285:38: warning: 'struct pci_bus' declared inside parameter list will not be visible outside of this definition or declaration

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Message-ID: <202201222055.733L3u7d-lkp@intel.com>
Date:   Sat, 22 Jan 2022 20:32:40 +0800
From:   kernel test robot <lkp@...el.com>
To:     Dan Williams <dan.j.williams@...el.com>
Cc:     kbuild-all@...ts.01.org,
        Alison Schofield <alison.schofield@...el.com>,
        Vishal Verma <vishal.l.verma@...el.com>,
        Ira Weiny <ira.weiny@...el.com>,
        Ben Widawsky <ben.widawsky@...el.com>,
        Dan Williams <dan.j.williams@...el.com>,
        linux-kernel@...r.kernel.org
Subject: [cxl:preview 34/53] drivers/cxl/cxl.h:285:38: warning: 'struct
 pci_bus' declared inside parameter list will not be visible outside of this
 definition or declaration

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git preview
head:   e675fabdbbcdb6e32dba688a20fb0bd42e0e2d5d
commit: 2b7a34a480122fb652df99554f6d59c5d9f3ef24 [34/53] cxl/core: Generalize dport enumeration in the core
config: arc-randconfig-r043-20220122 (https://download.01.org/0day-ci/archive/20220122/202201222055.733L3u7d-lkp@intel.com/config)
compiler: arceb-elf-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/cxl/cxl.git/commit/?id=2b7a34a480122fb652df99554f6d59c5d9f3ef24
        git remote add cxl https://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl.git
        git fetch --no-tags cxl preview
        git checkout 2b7a34a480122fb652df99554f6d59c5d9f3ef24
        # 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=arc SHELL=/bin/bash drivers/

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

All warnings (new ones prefixed by >>):

   In file included from drivers/cxl/cxlmem.h:7,
                    from drivers/cxl/core/pmem.c:6:
>> drivers/cxl/cxl.h:285:38: warning: 'struct pci_bus' declared inside parameter list will not be visible outside of this definition or declaration
     285 |                               struct pci_bus *bus);
         |                                      ^~~~~~~


vim +285 drivers/cxl/cxl.h

24be641caabe25 Ben Widawsky 2021-12-01  281  
42c377a63d21df Dan Williams 2022-01-05  282  bool is_cxl_port(struct device *dev);
4812be97c015bd Dan Williams 2021-06-09  283  struct cxl_port *to_cxl_port(struct device *dev);
7237f27228ec66 Dan Williams 2022-01-18  284  int devm_cxl_register_pci_bus(struct device *host, struct device *uport,
7237f27228ec66 Dan Williams 2022-01-18 @285  			      struct pci_bus *bus);
7237f27228ec66 Dan Williams 2022-01-18  286  struct pci_bus *cxl_port_to_pci_bus(struct cxl_port *port);
4812be97c015bd Dan Williams 2021-06-09  287  struct cxl_port *devm_cxl_add_port(struct device *host, struct device *uport,
4812be97c015bd Dan Williams 2021-06-09  288  				   resource_size_t component_reg_phys,
4812be97c015bd Dan Williams 2021-06-09  289  				   struct cxl_port *parent_port);
3c39e157b25e0c Dan Williams 2022-01-18  290  struct cxl_port *find_cxl_root(struct device *dev);
2b7a34a480122f Dan Williams 2022-01-18  291  struct cxl_dport *devm_cxl_add_dport(struct device *host, struct cxl_port *port,
2b7a34a480122f Dan Williams 2022-01-18  292  				     struct device *dport, int port_id,
2b7a34a480122f Dan Williams 2022-01-18  293  				     resource_size_t component_reg_phys);
40ba17afdfabb0 Dan Williams 2021-06-09  294  struct cxl_decoder *to_cxl_decoder(struct device *dev);
8fdcb1704f61a8 Dan Williams 2021-06-15  295  bool is_root_decoder(struct device *dev);
42c377a63d21df Dan Williams 2022-01-05  296  bool is_cxl_decoder(struct device *dev);
24be641caabe25 Ben Widawsky 2021-12-01  297  struct cxl_decoder *cxl_root_decoder_alloc(struct cxl_port *port,
24be641caabe25 Ben Widawsky 2021-12-01  298  					   unsigned int nr_targets);
24be641caabe25 Ben Widawsky 2021-12-01  299  struct cxl_decoder *cxl_switch_decoder_alloc(struct cxl_port *port,
24be641caabe25 Ben Widawsky 2021-12-01  300  					     unsigned int nr_targets);
48667f676189ec Dan Williams 2021-09-21  301  int cxl_decoder_add(struct cxl_decoder *cxld, int *target_map);
48667f676189ec Dan Williams 2021-09-21  302  int cxl_decoder_autoremove(struct device *host, struct cxl_decoder *cxld);
40ba17afdfabb0 Dan Williams 2021-06-09  303  

:::::: The code at line 285 was first introduced by commit
:::::: 7237f27228ec660f73924f38e553e1d2b2ff65c4 cxl/port: Introduce cxl_port_to_pci_bus()

:::::: TO: Dan Williams <dan.j.williams@...el.com>
:::::: CC: Dan Williams <dan.j.williams@...el.com>

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