[android-common:android-mainline-riscv64 0/1] drivers/pci/pci.c:426:9: warning: indirection of non-volatile null pointer will be deleted, not trap
kernel test robot <[email protected]>
| Newsgroups | dev.linux.lists.oe-kbuild-all |
|---|---|
| Message-ID | <[email protected]> |
Hi Carlos,
FYI, the error/warning still remains.
tree: https://android.googlesource.com/kernel/common android-mainline-riscv64
head: ff926f685d34996e7004a0e23d1c41ddf840c8e4
commit: e2f7a805a3cbfa7a546334d3409745e0b2037524 [0/1] Merge 1c2b4a4c2bcb ("Merge tag 'pci-v7.0-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/pci/pci") into android-mainline
config: x86_64-randconfig-014-20260822 (https://download.01.org/0day-ci/archive/20260822/[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/20260822/[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/pci/pci.c:16:
include/linux/iommu.h:1627:17: error: incomplete definition of type 'struct iommu_mm_data'
1627 | return iommu_mm->pasid;
| ~~~~~~~~^
include/linux/mm_types.h:1074:8: note: forward declaration of 'struct iommu_mm_data'
1074 | struct iommu_mm_data;
| ^
>> drivers/pci/pci.c:426:9: warning: indirection of non-volatile null pointer will be deleted, not trap [-Wnull-dereference]
426 | return PCI_FIND_NEXT_CAP(pci_bus_read_config, pos, cap, NULL, bus, devfn);
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/pci/pci.h:159:5: note: expanded from macro 'PCI_FIND_NEXT_CAP'
159 | *(u8 *)prev_ptr = __prev_pos; \
| ^~~~~~~~~~~~~~~
drivers/pci/pci.c:426:9: note: consider using __builtin_trap() or qualifying pointer with 'volatile'
drivers/pci/pci.h:159:5: note: expanded from macro 'PCI_FIND_NEXT_CAP'
159 | *(u8 *)prev_ptr = __prev_pos; \
| ^
drivers/pci/pci.c:530:9: warning: indirection of non-volatile null pointer will be deleted, not trap [-Wnull-dereference]
530 | return PCI_FIND_NEXT_EXT_CAP(pci_bus_read_config, start, cap,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
531 | NULL, dev->bus, dev->devfn);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/pci/pci.h:207:5: note: expanded from macro 'PCI_FIND_NEXT_EXT_CAP'
207 | *(u16 *)prev_ptr = __prev_pos; \
| ^~~~~~~~~~~~~~~~
drivers/pci/pci.c:530:9: note: consider using __builtin_trap() or qualifying pointer with 'volatile'
drivers/pci/pci.h:207:5: note: expanded from macro 'PCI_FIND_NEXT_EXT_CAP'
207 | *(u16 *)prev_ptr = __prev_pos; \
| ^
drivers/pci/pci.c:599:8: warning: indirection of non-volatile null pointer will be deleted, not trap [-Wnull-dereference]
599 | pos = PCI_FIND_NEXT_CAP(pci_bus_read_config, pos,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
600 | PCI_CAP_ID_HT, NULL, dev->bus, dev->devfn);
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/pci/pci.h:159:5: note: expanded from macro 'PCI_FIND_NEXT_CAP'
159 | *(u8 *)prev_ptr = __prev_pos; \
| ^~~~~~~~~~~~~~~
drivers/pci/pci.c:599:8: note: consider using __builtin_trap() or qualifying pointer with 'volatile'
drivers/pci/pci.h:159:5: note: expanded from macro 'PCI_FIND_NEXT_CAP'
159 | *(u8 *)prev_ptr = __prev_pos; \
| ^
drivers/pci/pci.c:609:9: warning: indirection of non-volatile null pointer will be deleted, not trap [-Wnull-dereference]
609 | pos = PCI_FIND_NEXT_CAP(pci_bus_read_config,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
610 | pos + PCI_CAP_LIST_NEXT,
| ~~~~~~~~~~~~~~~~~~~~~~~~
611 | PCI_CAP_ID_HT, NULL, dev->bus,
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
612 | dev->devfn);
| ~~~~~~~~~~~
drivers/pci/pci.h:159:5: note: expanded from macro 'PCI_FIND_NEXT_CAP'
159 | *(u8 *)prev_ptr = __prev_pos; \
| ^~~~~~~~~~~~~~~
drivers/pci/pci.c:609:9: note: consider using __builtin_trap() or qualifying pointer with 'volatile'
drivers/pci/pci.h:159:5: note: expanded from macro 'PCI_FIND_NEXT_CAP'
159 | *(u8 *)prev_ptr = __prev_pos; \
| ^
4 warnings and 1 error generated.
Kconfig warnings: (for reference only)
WARNING: unmet direct dependencies detected for BALLOON_COMPACTION
Depends on [n]: COMPACTION [=n] && MEMORY_BALLOON [=y]
Selected by [y]:
- GKI_HIDDEN_MM_CONFIGS [=y]
WARNING: unmet direct dependencies detected for SND_PCM_ELD
Depends on [n]: SOUND [=n] && SND [=n]
Selected by [y]:
- GKI_HIDDEN_SND_CONFIGS [=y]
WARNING: unmet direct dependencies detected for SND_PCM_IEC958
Depends on [n]: SOUND [=n] && SND [=n]
Selected by [y]:
- GKI_HIDDEN_SND_SOC_CONFIGS [=y]
WARNING: unmet direct dependencies detected for IOMMU_SVA
Depends on [n]: IOMMU_SUPPORT [=n]
Selected by [y]:
- GKI_HIDDEN_IOMMU_CONFIGS [=y] && (ARM64 || X86 [=y])
WARNING: unmet direct dependencies detected for SND_COMPRESS_ACCEL
Depends on [n]: SOUND [=n] && SND [=n]
Selected by [y]:
- GKI_HIDDEN_SND_CONFIGS [=y]
WARNING: unmet direct dependencies detected for SND_JACK
Depends on [n]: SOUND [=n] && SND [=n]
Selected by [y]:
- GKI_HIDDEN_SND_CONFIGS [=y]
WARNING: unmet direct dependencies detected for SND_VMASTER
Depends on [n]: SOUND [=n] && SND [=n]
Selected by [y]:
- GKI_HIDDEN_SND_CONFIGS [=y]
WARNING: unmet direct dependencies detected for CAN_RX_OFFLOAD
Depends on [n]: NETDEVICES [=y] && CAN_DEV [=n] && CAN_NETLINK [=n]
Selected by [y]:
- GKI_HIDDEN_MCP251XFD_CONFIGS [=y]
WARNING: unmet direct dependencies detected for SND_JACK_INPUT_DEV
Depends on [n]: SOUND [=n] && SND [=n] && SND_JACK [=y]
Selected by [y]:
- GKI_HIDDEN_SND_CONFIGS [=y]
WARNING: unmet direct dependencies detected for SND_INTEL_NHLT
Depends on [n]: SOUND [=n] && SND [=n]
Selected by [y]:
- GKI_HIDDEN_SND_CONFIGS [=y] && ACPI [=y]
vim +426 drivers/pci/pci.c
687d5fe3dc3379 Michael Ellerman 2006-11-22 422
f646c2a0a6685a Puranjay Mohan 2020-11-29 423 static u8 __pci_find_next_cap(struct pci_bus *bus, unsigned int devfn,
687d5fe3dc3379 Michael Ellerman 2006-11-22 424 u8 pos, int cap)
687d5fe3dc3379 Michael Ellerman 2006-11-22 425 {
a2582e05e39adf Qiang Yu 2025-11-09 @426 return PCI_FIND_NEXT_CAP(pci_bus_read_config, pos, cap, NULL, bus, devfn);
687d5fe3dc3379 Michael Ellerman 2006-11-22 427 }
687d5fe3dc3379 Michael Ellerman 2006-11-22 428
:::::: The code at line 426 was first introduced by commit
:::::: a2582e05e39adf9ab82a02561cd6f70738540ae0 PCI: Add preceding capability position support in PCI_FIND_NEXT_*_CAP macros
:::::: TO: Qiang Yu <[email protected]>
:::::: CC: Manivannan Sadhasivam <[email protected]>
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