tree:   https://github.com/ammarfaizi2/linux-block dhowells/linux-fs/cifs-for-viro
head:   36501a16f9488b5e40c3649db6c72ad356a4b861
commit: b21cd8eded0be08b72dca58736fb226e00f648e0 [3/13] iov_iter: Add a function to extract a page list from an iterator
config: mips-randconfig-s033-20221106
compiler: mips-linux-gcc (GCC) 12.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.4-39-gce1a6720-dirty
        # https://github.com/ammarfaizi2/linux-block/commit/b21cd8eded0be08b72dca58736fb226e00f648e0
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block dhowells/linux-fs/cifs-for-viro
        git checkout b21cd8eded0be08b72dca58736fb226e00f648e0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=mips SHELL=/bin/bash

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

sparse warnings: (new ones prefixed by >>)
>> lib/iov_iter.c:2215:19: sparse: sparse: incompatible types in comparison expression (different signedness):
   lib/iov_iter.c:2215:19: sparse:    unsigned int *
>> lib/iov_iter.c:2215:19: sparse:    int *

vim +2215 lib/iov_iter.c

  2159	
  2160	/**
  2161	 * iov_iter_extract_pages - Extract a list of contiguous pages from an iterator
  2162	 * @i: The iterator to extract from
  2163	 * @pages: Where to return the list of pages
  2164	 * @maxsize: The maximum amount of iterator to extract
  2165	 * @maxpages: The maximum size of the list of pages
  2166	 * @offset0: Where to return the starting offset into (*@pages)[0]
  2167	 *
  2168	 * Extract a list of contiguous pages from the current point of the iterator,
  2169	 * advancing the iterator.  The maximum number of pages and the maximum amount
  2170	 * of page contents can be set.
  2171	 *
  2172	 * If *@pages is NULL, a page list will be allocated to the required size and
  2173	 * *@pages will be set to its base.  If *@pages is not NULL, it will be assumed
  2174	 * that the caller allocated a page list at least @maxpages in size and this
  2175	 * will be filled in.
  2176	 *
  2177	 * Extra refs or pins on the pages may be obtained as follows:
  2178	 *
  2179	 *  (*) If the iterator is user-backed (ITER_IOVEC/ITER_UBUF) and data is to be
  2180	 *      transferred /OUT OF/ the described buffer, refs will be taken on the
  2181	 *      pages, but pins will not be added.  This can be used for DMA from a
  2182	 *      page; it cannot be used for DMA to a page, as it may cause page-COW
  2183	 *      problems in fork.
  2184	 *
  2185	 *  (*) If the iterator is user-backed (ITER_IOVEC/ITER_UBUF) and data is to be
  2186	 *      transferred /INTO/ the described buffer, pins will be added to the
  2187	 *      pages, but refs will not be taken.  This must be used for DMA to a
  2188	 *      page.
  2189	 *
  2190	 *  (*) If the iterator is ITER_PIPE, this must describe a destination for the
  2191	 *      data.  Additional pages may be allocated and added to the pipe (which
  2192	 *      will hold the refs), but neither refs nor pins will be obtained for the
  2193	 *      caller.  The caller must hold the pipe lock.
  2194	 *
  2195	 *  (*) If the iterator is ITER_BVEC or ITER_XARRAY, the pages are merely
  2196	 *      listed; no extra refs or pins are obtained.
  2197	 *
  2198	 * Note also:
  2199	 *
  2200	 *  (*) Use with ITER_KVEC is not supported as that may refer to memory that
  2201	 *      doesn't have associated page structs.
  2202	 *
  2203	 *  (*) Use with ITER_DISCARD is not supported as that has no content.
  2204	 *
  2205	 * On success, the function sets *@pages to the new pagelist, if allocated, and
  2206	 * sets *offset0 to the offset into the first page and returns the amount of
  2207	 * buffer space added represented by the page list.
  2208	 *
  2209	 * It may also return -ENOMEM and -EFAULT.
  2210	 */
  2211	ssize_t iov_iter_extract_pages(struct iov_iter *i, struct page ***pages,
  2212				       size_t maxsize, unsigned int maxpages,
  2213				       size_t *offset0)
  2214	{
> 2215		maxsize = min3(maxsize, i->count, MAX_RW_COUNT);

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp