* [intel-tdx:huge_page_v2 194/204] arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1447:3: error: call to undeclared function 'kvm_gmem_invalidate_begin'; ISO C99 and later do not support implicit function declarations
@ 2025-08-07 19:23 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-08-07 19:23 UTC (permalink / raw)
To: Yan Zhao; +Cc: llvm, oe-kbuild-all, Ackerley Tng
tree: https://github.com/intel/tdx.git huge_page_v2
head: 0744d0b90629d528fa94ff73dce7ceeaaed1560c
commit: bee3734f98a1de8b3926f6706f5900750f5023fc [194/204] KVM: guest_memfd: Split for punch hole and private-to-shared conversion
config: x86_64-rhel-9.4-rust (https://download.01.org/0day-ci/archive/20250808/202508080344.qXKoVsWI-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250808/202508080344.qXKoVsWI-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/202508080344.qXKoVsWI-lkp@intel.com/
All errors (new ones prefixed by >>):
>> arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1447:3: error: call to undeclared function 'kvm_gmem_invalidate_begin'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1447 | kvm_gmem_invalidate_begin(gmem, start, end);
| ^
arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1447:3: note: did you mean 'kvm_mmu_invalidate_begin'?
include/linux/kvm_host.h:1537:6: note: 'kvm_mmu_invalidate_begin' declared here
1537 | void kvm_mmu_invalidate_begin(struct kvm *kvm);
| ^
>> arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1451:9: error: call to undeclared function 'kvm_gmem_split_private'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1451 | ret = kvm_gmem_split_private(gmem, start, end);
| ^
arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1451:9: note: did you mean 'kvm_gmem_is_private'?
include/linux/kvm_host.h:2512:20: note: 'kvm_gmem_is_private' declared here
2512 | static inline bool kvm_gmem_is_private(struct kvm_memory_slot *slot, gfn_t gfn)
| ^
>> arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1467:3: error: call to undeclared function 'kvm_gmem_zap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1467 | kvm_gmem_zap(gmem, start, end, filter);
| ^
arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1598:2: error: call to undeclared function 'kvm_gmem_invalidate_begin'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1598 | kvm_gmem_invalidate_begin(gmem, 0, -1ul);
| ^
arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1599:2: error: call to undeclared function 'kvm_gmem_zap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1599 | kvm_gmem_zap(gmem, 0, -1ul, KVM_FILTER_PRIVATE | KVM_FILTER_SHARED);
| ^
arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1770:15: warning: variable 'argp' set but not used [-Wunused-but-set-variable]
1770 | void __user *argp;
| ^
arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1933:3: error: call to undeclared function 'kvm_gmem_invalidate_begin'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1933 | kvm_gmem_invalidate_begin(gmem, start, end);
| ^
arch/x86/kvm/../../../virt/kvm/guest_memfd.c:1935:3: error: call to undeclared function 'kvm_gmem_zap'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
1935 | kvm_gmem_zap(gmem, start, end, filter);
| ^
1 warning and 7 errors generated.
vim +/kvm_gmem_invalidate_begin +1447 arch/x86/kvm/../../../virt/kvm/guest_memfd.c
1431
1432 static long kvm_gmem_punch_hole(struct inode *inode, loff_t offset, loff_t len)
1433 {
1434 struct list_head *gmem_list = &inode->i_mapping->i_private_list;
1435 pgoff_t start = offset >> PAGE_SHIFT;
1436 pgoff_t end = (offset + len) >> PAGE_SHIFT;
1437 struct kvm_gmem *gmem;
1438 long ret;
1439
1440 /*
1441 * Bindings must be stable across invalidation to ensure the start+end
1442 * are balanced.
1443 */
1444 filemap_invalidate_lock(inode->i_mapping);
1445
1446 list_for_each_entry(gmem, gmem_list, entry)
> 1447 kvm_gmem_invalidate_begin(gmem, start, end);
1448
1449 ret = 0;
1450 list_for_each_entry(gmem, gmem_list, entry) {
> 1451 ret = kvm_gmem_split_private(gmem, start, end);
1452 if (ret)
1453 goto out;
1454 }
1455 list_for_each_entry(gmem, gmem_list, entry) {
1456 enum kvm_gfn_range_filter filter;
1457
1458 /*
1459 * kvm_gmem_invalidate_begin() would have unmapped shared
1460 * mappings via mmu notifiers, but only if those mappings were
1461 * actually set up. Since guest_memfd cannot assume that shared
1462 * mappings were set up, zap both private and shared mappings
1463 * here. If shared mappings were zapped, this should not be
1464 * expensive.
1465 */
1466 filter = KVM_FILTER_PRIVATE | KVM_FILTER_SHARED;
> 1467 kvm_gmem_zap(gmem, start, end, filter);
1468 }
1469 if (kvm_gmem_has_custom_allocator(inode)) {
1470 ret = kvm_gmem_truncate_inode_range(inode, offset, offset + len);
1471 } else {
1472 /* Page size is PAGE_SIZE, so use optimized truncation function. */
1473 truncate_inode_pages_range(inode->i_mapping, offset, offset + len - 1);
1474 }
1475
1476 out:
1477 list_for_each_entry(gmem, gmem_list, entry)
1478 kvm_gmem_invalidate_end(gmem, start, end);
1479
1480 filemap_invalidate_unlock(inode->i_mapping);
1481
1482 return ret;
1483 }
1484
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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