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Date:   Tue, 8 Mar 2022 13:35:37 +0800
From:   kernel test robot <lkp@intel.com>
To:     Daehwan Jung <dh10.jung@samsung.com>,
        Mathias Nyman <mathias.nyman@intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc:     llvm@lists.linux.dev, kbuild-all@lists.01.org,
        linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org,
        Howard Yen <howardyen@google.com>,
        Jack Pham <jackp@codeaurora.org>,
        Puma Hsu <pumahsu@google.com>,
        "J . Avila" <elavila@google.com>,
        "chihhao . chen" <chihhao.chen@mediatek.com>,
        Daehwan Jung <dh10.jung@samsung.com>, sc.suh@samsung.com,
        cpgs@samsung.com, cpgsproxy5@samsung.com
Subject: Re: [PATCH v1 1/4] usb: host: export symbols for xhci hooks usage
Message-ID: <202203081332.nZHV3ZBo-lkp@intel.com>
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Hi Daehwan,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on krzk/for-next]
[also build test WARNING on char-misc/char-misc-testing v5.17-rc7 next-20220307]
[cannot apply to usb/usb-testing]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Daehwan-Jung/usb-host-export-symbols-for-xhci-hooks-usage/20220304-143406
base:   https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git for-next
config: hexagon-randconfig-r045-20220304 (https://download.01.org/0day-ci/archive/20220308/202203081332.nZHV3ZBo-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project d271fc04d5b97b12e6b797c6067d3c96a8d7470e)
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://github.com/0day-ci/linux/commit/66bd02564cf7e666cf4c47f83965148fa5b90829
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Daehwan-Jung/usb-host-export-symbols-for-xhci-hooks-usage/20220304-143406
        git checkout 66bd02564cf7e666cf4c47f83965148fa5b90829
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=hexagon SHELL=/bin/bash drivers/usb/host/

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

All warnings (new ones prefixed by >>):

   drivers/usb/host/xhci-mem.c:68:6: warning: no previous prototype for function 'xhci_segment_free' [-Wmissing-prototypes]
   void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
        ^
   drivers/usb/host/xhci-mem.c:68:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void xhci_segment_free(struct xhci_hcd *xhci, struct xhci_segment *seg)
   ^
   static 
   drivers/usb/host/xhci-mem.c:79:6: warning: no previous prototype for function 'xhci_free_segments_for_ring' [-Wmissing-prototypes]
   void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
        ^
   drivers/usb/host/xhci-mem.c:79:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void xhci_free_segments_for_ring(struct xhci_hcd *xhci,
   ^
   static 
   drivers/usb/host/xhci-mem.c:100:6: warning: no previous prototype for function 'xhci_link_segments' [-Wmissing-prototypes]
   void xhci_link_segments(struct xhci_segment *prev,
        ^
   drivers/usb/host/xhci-mem.c:100:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void xhci_link_segments(struct xhci_segment *prev,
   ^
   static 
>> drivers/usb/host/xhci-mem.c:211:6: warning: no previous prototype for function 'xhci_remove_segment_mapping' [-Wmissing-prototypes]
   void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
        ^
   drivers/usb/host/xhci-mem.c:211:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
   ^
   static 
>> drivers/usb/host/xhci-mem.c:262:6: warning: no previous prototype for function 'xhci_remove_stream_mapping' [-Wmissing-prototypes]
   void xhci_remove_stream_mapping(struct xhci_ring *ring)
        ^
   drivers/usb/host/xhci-mem.c:262:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void xhci_remove_stream_mapping(struct xhci_ring *ring)
   ^
   static 
   drivers/usb/host/xhci-mem.c:1984:5: warning: no previous prototype for function 'xhci_check_trb_in_td_math' [-Wmissing-prototypes]
   int xhci_check_trb_in_td_math(struct xhci_hcd *xhci)
       ^
   drivers/usb/host/xhci-mem.c:1984:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int xhci_check_trb_in_td_math(struct xhci_hcd *xhci)
   ^
   static 
   6 warnings generated.


vim +/xhci_remove_segment_mapping +211 drivers/usb/host/xhci-mem.c

   210	
 > 211	void xhci_remove_segment_mapping(struct radix_tree_root *trb_address_map,
   212			struct xhci_segment *seg)
   213	{
   214		unsigned long key;
   215	
   216		key = (unsigned long)(seg->dma >> TRB_SEGMENT_SHIFT);
   217		if (radix_tree_lookup(trb_address_map, key))
   218			radix_tree_delete(trb_address_map, key);
   219	}
   220	EXPORT_SYMBOL_GPL(xhci_remove_segment_mapping);
   221	
   222	static int xhci_update_stream_segment_mapping(
   223			struct radix_tree_root *trb_address_map,
   224			struct xhci_ring *ring,
   225			struct xhci_segment *first_seg,
   226			struct xhci_segment *last_seg,
   227			gfp_t mem_flags)
   228	{
   229		struct xhci_segment *seg;
   230		struct xhci_segment *failed_seg;
   231		int ret;
   232	
   233		if (WARN_ON_ONCE(trb_address_map == NULL))
   234			return 0;
   235	
   236		seg = first_seg;
   237		do {
   238			ret = xhci_insert_segment_mapping(trb_address_map,
   239					ring, seg, mem_flags);
   240			if (ret)
   241				goto remove_streams;
   242			if (seg == last_seg)
   243				return 0;
   244			seg = seg->next;
   245		} while (seg != first_seg);
   246	
   247		return 0;
   248	
   249	remove_streams:
   250		failed_seg = seg;
   251		seg = first_seg;
   252		do {
   253			xhci_remove_segment_mapping(trb_address_map, seg);
   254			if (seg == failed_seg)
   255				return ret;
   256			seg = seg->next;
   257		} while (seg != first_seg);
   258	
   259		return ret;
   260	}
   261	
 > 262	void xhci_remove_stream_mapping(struct xhci_ring *ring)
   263	{
   264		struct xhci_segment *seg;
   265	
   266		if (WARN_ON_ONCE(ring->trb_address_map == NULL))
   267			return;
   268	
   269		seg = ring->first_seg;
   270		do {
   271			xhci_remove_segment_mapping(ring->trb_address_map, seg);
   272			seg = seg->next;
   273		} while (seg != ring->first_seg);
   274	}
   275	EXPORT_SYMBOL_GPL(xhci_remove_stream_mapping);
   276	

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