Re: [PATCH 2/2] usb: gadget: functionfs: Add DMABUF import interface

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Hi Paul,

I love your patch! Yet something to improve:

[auto build test ERROR on usb/usb-testing]
[also build test ERROR on usb/usb-next usb/usb-linus linus/master v6.3-rc2 next-20230314]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Paul-Cercueil/usb-gadget-Support-already-mapped-DMA-SGs/20230314-185522
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
patch link:    https://lore.kernel.org/r/20230314105257.17345-3-paul%40crapouillou.net
patch subject: [PATCH 2/2] usb: gadget: functionfs: Add DMABUF import interface
config: arm-defconfig (https://download.01.org/0day-ci/archive/20230315/202303151116.lxbyxGM6-lkp@xxxxxxxxx/config)
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
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://github.com/intel-lab-lkp/linux/commit/4ee364ed5d112c4550344fd037f4e1ef7cc41878
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Paul-Cercueil/usb-gadget-Support-already-mapped-DMA-SGs/20230314-185522
        git checkout 4ee364ed5d112c4550344fd037f4e1ef7cc41878
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202303151116.lxbyxGM6-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>, old ones prefixed by <<):

>> ERROR: modpost: module usb_f_fs uses symbol dma_buf_attach from namespace DMA_BUF, but does not import it.
>> ERROR: modpost: module usb_f_fs uses symbol dma_buf_map_attachment from namespace DMA_BUF, but does not import it.
>> ERROR: modpost: module usb_f_fs uses symbol dma_buf_unmap_attachment from namespace DMA_BUF, but does not import it.
>> ERROR: modpost: module usb_f_fs uses symbol dma_buf_get from namespace DMA_BUF, but does not import it.
>> ERROR: modpost: module usb_f_fs uses symbol dma_buf_put from namespace DMA_BUF, but does not import it.
>> ERROR: modpost: module usb_f_fs uses symbol dma_buf_detach from namespace DMA_BUF, but does not import it.

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests



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