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Message-ID: <202510110819.km2ehSaB-lkp@intel.com>
Date: Sat, 11 Oct 2025 09:12:24 +0800
From: kernel test robot <lkp@...el.com>
To: Stanislav Kinsburskii <skinsburskii@...ux.microsoft.com>,
kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
decui@...rosoft.com
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 5/5] Drivers: hv: Add support for movable memory
regions
Hi Stanislav,
kernel test robot noticed the following build errors:
[auto build test ERROR on linus/master]
[also build test ERROR on next-20251010]
[cannot apply to v6.17]
[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/Stanislav-Kinsburskii/Drivers-hv-Refactor-and-rename-memory-region-handling-functions/20251010-111917
base: linus/master
patch link: https://lore.kernel.org/r/175976319844.16834.4747024333732752980.stgit%40skinsburskii-cloud-desktop.internal.cloudapp.net
patch subject: [PATCH v4 5/5] Drivers: hv: Add support for movable memory regions
config: x86_64-buildonly-randconfig-001-20251011 (https://download.01.org/0day-ci/archive/20251011/202510110819.km2ehSaB-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251011/202510110819.km2ehSaB-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202510110819.km2ehSaB-lkp@intel.com/
All errors (new ones prefixed by >>):
>> mm/hmm.c:667:7: error: call to undeclared function 'mmu_interval_check_retry'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
667 | if (mmu_interval_check_retry(range->notifier,
| ^
1 error generated.
vim +/mmu_interval_check_retry +667 mm/hmm.c
7b86ac3371b70c3 Christoph Hellwig 2019-08-28 634
9a4903e49e495bf Christoph Hellwig 2019-07-25 635 /**
9a4903e49e495bf Christoph Hellwig 2019-07-25 636 * hmm_range_fault - try to fault some address in a virtual address range
f970b977e068aa5 Jason Gunthorpe 2020-03-27 637 * @range: argument structure
9a4903e49e495bf Christoph Hellwig 2019-07-25 638 *
be957c886d92aa9 Jason Gunthorpe 2020-05-01 639 * Returns 0 on success or one of the following error codes:
73231612dc7c907 Jérôme Glisse 2019-05-13 640 *
9a4903e49e495bf Christoph Hellwig 2019-07-25 641 * -EINVAL: Invalid arguments or mm or virtual address is in an invalid vma
9a4903e49e495bf Christoph Hellwig 2019-07-25 642 * (e.g., device file vma).
73231612dc7c907 Jérôme Glisse 2019-05-13 643 * -ENOMEM: Out of memory.
9a4903e49e495bf Christoph Hellwig 2019-07-25 644 * -EPERM: Invalid permission (e.g., asking for write and range is read
9a4903e49e495bf Christoph Hellwig 2019-07-25 645 * only).
9a4903e49e495bf Christoph Hellwig 2019-07-25 646 * -EBUSY: The range has been invalidated and the caller needs to wait for
9a4903e49e495bf Christoph Hellwig 2019-07-25 647 * the invalidation to finish.
f970b977e068aa5 Jason Gunthorpe 2020-03-27 648 * -EFAULT: A page was requested to be valid and could not be made valid
f970b977e068aa5 Jason Gunthorpe 2020-03-27 649 * ie it has no backing VMA or it is illegal to access
74eee180b935fcb Jérôme Glisse 2017-09-08 650 *
f970b977e068aa5 Jason Gunthorpe 2020-03-27 651 * This is similar to get_user_pages(), except that it can read the page tables
f970b977e068aa5 Jason Gunthorpe 2020-03-27 652 * without mutating them (ie causing faults).
74eee180b935fcb Jérôme Glisse 2017-09-08 653 */
be957c886d92aa9 Jason Gunthorpe 2020-05-01 654 int hmm_range_fault(struct hmm_range *range)
74eee180b935fcb Jérôme Glisse 2017-09-08 655 {
d28c2c9a487708b Ralph Campbell 2019-11-04 656 struct hmm_vma_walk hmm_vma_walk = {
d28c2c9a487708b Ralph Campbell 2019-11-04 657 .range = range,
d28c2c9a487708b Ralph Campbell 2019-11-04 658 .last = range->start,
d28c2c9a487708b Ralph Campbell 2019-11-04 659 };
a22dd506400d0f4 Jason Gunthorpe 2019-11-12 660 struct mm_struct *mm = range->notifier->mm;
74eee180b935fcb Jérôme Glisse 2017-09-08 661 int ret;
74eee180b935fcb Jérôme Glisse 2017-09-08 662
42fc541404f2497 Michel Lespinasse 2020-06-08 663 mmap_assert_locked(mm);
74eee180b935fcb Jérôme Glisse 2017-09-08 664
a3e0d41c2b1f86b Jérôme Glisse 2019-05-13 665 do {
a3e0d41c2b1f86b Jérôme Glisse 2019-05-13 666 /* If range is no longer valid force retry. */
a22dd506400d0f4 Jason Gunthorpe 2019-11-12 @667 if (mmu_interval_check_retry(range->notifier,
a22dd506400d0f4 Jason Gunthorpe 2019-11-12 668 range->notifier_seq))
2bcbeaefde2f038 Christoph Hellwig 2019-07-24 669 return -EBUSY;
d28c2c9a487708b Ralph Campbell 2019-11-04 670 ret = walk_page_range(mm, hmm_vma_walk.last, range->end,
7b86ac3371b70c3 Christoph Hellwig 2019-08-28 671 &hmm_walk_ops, &hmm_vma_walk);
be957c886d92aa9 Jason Gunthorpe 2020-05-01 672 /*
be957c886d92aa9 Jason Gunthorpe 2020-05-01 673 * When -EBUSY is returned the loop restarts with
be957c886d92aa9 Jason Gunthorpe 2020-05-01 674 * hmm_vma_walk.last set to an address that has not been stored
be957c886d92aa9 Jason Gunthorpe 2020-05-01 675 * in pfns. All entries < last in the pfn array are set to their
be957c886d92aa9 Jason Gunthorpe 2020-05-01 676 * output, and all >= are still at their input values.
be957c886d92aa9 Jason Gunthorpe 2020-05-01 677 */
d28c2c9a487708b Ralph Campbell 2019-11-04 678 } while (ret == -EBUSY);
73231612dc7c907 Jérôme Glisse 2019-05-13 679 return ret;
74eee180b935fcb Jérôme Glisse 2017-09-08 680 }
73231612dc7c907 Jérôme Glisse 2019-05-13 681 EXPORT_SYMBOL(hmm_range_fault);
8cad47130566123 Leon Romanovsky 2025-04-28 682
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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