Re: [RFC 2/3] io_uring: enable io_uring to submit sqes located in kernel

[kernel test robot <lkp@intel.com>]

Hi Xiaoguang,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on bpf/master]
[also build test ERROR on axboe-block/for-next linus/master v6.2-rc8]
[cannot apply to bpf-next/master next-20230215]
[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/Xiaoguang-Wang/bpf-add-UBLK-program-type/20230215-084242
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git master
patch link:    https://lore.kernel.org/r/20230215004122.28917-3-xiaoguang.wang%40linux.alibaba.com
patch subject: [RFC 2/3] io_uring: enable io_uring to submit sqes located in kernel
config: i386-tinyconfig (https://download.01.org/0day-ci/archive/20230215/202302152202.3aHc65jB-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
        # https://github.com/intel-lab-lkp/linux/commit/0d433a1cf7f666e5596514da7fab92f2691463ad
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Xiaoguang-Wang/bpf-add-UBLK-program-type/20230215-084242
        git checkout 0d433a1cf7f666e5596514da7fab92f2691463ad
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202302152202.3aHc65jB-lkp@intel.com/

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

   In file included from kernel/fork.c:97:
>> include/linux/io_uring.h:107:5: warning: no previous prototype for 'io_uring_submit_sqe' [-Wmissing-prototypes]
     107 | int io_uring_submit_sqe(int fd, const struct io_uring_sqe *sqe, u32 sqe_len,
         |     ^~~~~~~~~~~~~~~~~~~
--
   In file included from kernel/exit.c:67:
>> include/linux/io_uring.h:107:5: warning: no previous prototype for 'io_uring_submit_sqe' [-Wmissing-prototypes]
     107 | int io_uring_submit_sqe(int fd, const struct io_uring_sqe *sqe, u32 sqe_len,
         |     ^~~~~~~~~~~~~~~~~~~
   kernel/exit.c:1901:13: warning: no previous prototype for 'abort' [-Wmissing-prototypes]
    1901 | __weak void abort(void)
         |             ^~~~~
--
   ld: kernel/exit.o: in function `io_uring_submit_sqe':
>> exit.c:(.text+0x4b6): multiple definition of `io_uring_submit_sqe'; kernel/fork.o:fork.c:(.text+0x5bb): first defined here
   ld: fs/exec.o: in function `io_uring_submit_sqe':
   exec.c:(.text+0x9c5): multiple definition of `io_uring_submit_sqe'; kernel/fork.o:fork.c:(.text+0x5bb): first defined here

-- 
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https://github.com/intel/lkp-tests