Re: [linux-next:master 4179/4667] drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:3301:3: error: call to undeclared function 'pci_prepare_ats'; ISO C99 and later do not support implicit function declarations

[Konrad Dybcio <konradybcio@kernel.org>]

On 15.08.2024 12:09 AM, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   320eb81df4f6c1a1814fd02ebb4ba41eb80a3c7e
> commit: 2665d975db35f124d47e9584d448a3fb4d54f225 [4179/4667] iommu: Allow ATS to work on VFs when the PF uses IDENTITY
> config: arm64-randconfig-003-20240815 (https://download.01.org/0day-ci/archive/20240815/202408150626.4kndgpL3-lkp@intel.com/config)
> compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project f86594788ce93b696675c94f54016d27a6c21d18)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240815/202408150626.4kndgpL3-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/202408150626.4kndgpL3-lkp@intel.com/
> 
> All errors (new ones prefixed by >>):
> 
>    In file included from drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:15:
>    In file included from include/linux/crash_dump.h:5:
>    In file included from include/linux/kexec.h:18:
>    In file included from include/linux/vmcore_info.h:6:
>    In file included from include/linux/elfcore.h:11:
>    In file included from include/linux/ptrace.h:10:
>    In file included from include/linux/pid_namespace.h:7:
>    In file included from include/linux/mm.h:2228:
>    include/linux/vmstat.h:514:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
>      514 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
>          |                               ~~~~~~~~~~~ ^ ~~~
>>> drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:3301:3: error: call to undeclared function 'pci_prepare_ats'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>     3301 |                 pci_prepare_ats(to_pci_dev(dev), stu);
>          |                 ^
>    drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c:3301:3: note: did you mean 'pci_enable_ats'?
>    include/linux/pci-ats.h:18:19: note: 'pci_enable_ats' declared here
>       18 | static inline int pci_enable_ats(struct pci_dev *d, int ps)
>          |                   ^
>    1 warning and 1 error generated.
> 
> 
> vim +/pci_prepare_ats +3301 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c

Hi, this is still an issue on next-20240826

Konrad