On Fri, Oct 09, 2026 at 12:49:37AM +0800, kernel test robot wrote: > Hi Emerson, > > kernel test robot noticed the following build warnings: > > [auto build test WARNING on char-misc/char-misc-testing] > [also build test WARNING on char-misc/char-misc-next > char-misc/char-misc-linus linus/master v7.3-rc6 next-20261008] > [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/Emerson-Busson/hv-vmbus-convert-ring-backing-through-the-chunk-allocator/20261007-160739 > base: char-misc/char-misc-testing > patch link: > https://lore.kernel.org/r/20261007190752.336426-11-emersonbusson%40gmail.com > patch subject: [PATCH v2 10/14] hv: vmbus: pin buffer pages across UIO mmap > to close the reclaim race > config: i386-randconfig-1001-20261008 > (https://download.01.org/0day-ci/archive/20261009/[email protected]/config) > compiler: clang version 22.1.3 (https://github.com/llvm/llvm-project > e9846648fd6183ee6d8cbdb4502213fcf902a211) > reproduce (this is a W=1 build): > (https://download.01.org/0day-ci/archive/20261009/[email protected]/reproduce) > > If you fix the issue in a separate patch/commit (i.e. not just a new version > of > the same patch/commit), kindly add following tags > | Reported-by: kernel test robot <[email protected]> > | Closes: > https://lore.kernel.org/oe-kbuild-all/[email protected]/ > > All warnings (new ones prefixed by >>): > > In file included from drivers/uio/uio_hv_generic.c:428: > >> drivers/uio/uio_hv_generic_mmap_test.c:36:34: warning: implicit conversion > >> from 'u64' (aka 'unsigned long long') to 'unsigned long' changes value > >> from 18446744073709551615 to 4294967295 [-Wconstant-conversion] > 36 | hv_uio_mmap_range_valid(8, U64_MAX, 1)); > | ~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~
GCC also warns in the same way. Should probably be ULONG_MAX since 'pgoff_t' is 'unsigned long'? -- Cheers, Nathan
