* Re: [PATCH v2 10/14] hv: vmbus: pin buffer pages across UIO mmap to close the reclaim race
[not found] <20261007190752.336426-11-emersonbusson@gmail.com>
@ 2026-10-08 16:49 ` kernel test robot
2026-10-08 17:51 ` Nathan Chancellor
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2026-10-08 16:49 UTC (permalink / raw)
To: Emerson Busson, mhklinux
Cc: llvm, oe-kbuild-all, kys, haiyangz, wei.liu, decui, andrew+netdev,
davem, edumazet, kuba, pabeni, gregkh, linux-kernel, linux-hyperv,
netdev
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/20261009/202610090058.hvXsWpoT-lkp@intel.com/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/20261009/202610090058.hvXsWpoT-lkp@intel.com/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 <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202610090058.hvXsWpoT-lkp@intel.com/
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));
| ~~~~~~~~~~~~~~~~~~~~~~~ ^~~~~~~
include/linux/limits.h:25:19: note: expanded from macro 'U64_MAX'
25 | #define U64_MAX ((u64)~0ULL)
| ^~~~~~~~~~
include/kunit/test.h:1014:31: note: expanded from macro 'KUNIT_EXPECT_FALSE'
1014 | KUNIT_EXPECT_FALSE_MSG(test, condition, NULL)
| ^~~~~~~~~
include/kunit/test.h:1019:7: note: expanded from macro 'KUNIT_EXPECT_FALSE_MSG'
1019 | condition, \
| ^~~~~~~~~
include/kunit/test.h:812:10: note: expanded from macro 'KUNIT_FALSE_MSG_ASSERTION'
812 | condition, \
| ^~~~~~~~~
include/kunit/test.h:788:16: note: expanded from macro 'KUNIT_UNARY_ASSERTION'
788 | if (likely(!!(condition_) == !!expected_true_)) \
| ^~~~~~~~~~
include/linux/compiler.h:76:40: note: expanded from macro 'likely'
76 | # define likely(x) __builtin_expect(!!(x), 1)
| ^
1 warning generated.
vim +36 drivers/uio/uio_hv_generic_mmap_test.c
27
28 static void hv_uio_ring_mmap_range_test(struct kunit *test)
29 {
30 KUNIT_EXPECT_TRUE(test, hv_uio_mmap_range_valid(8, 0, 8));
31 KUNIT_EXPECT_TRUE(test, hv_uio_mmap_range_valid(8, 4, 4));
32 KUNIT_EXPECT_FALSE(test, hv_uio_mmap_range_valid(8, 8, 1));
33 KUNIT_EXPECT_FALSE(test, hv_uio_mmap_range_valid(8, 7, 2));
34 KUNIT_EXPECT_FALSE(test, hv_uio_mmap_range_valid(8, 0, 0));
35 KUNIT_EXPECT_FALSE(test,
> 36 hv_uio_mmap_range_valid(8, U64_MAX, 1));
37 }
38
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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