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PCI/ATS: Restore EXPORT_SYMBOL_GPL() for pci_{enable,disable}_ats()

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Commit d355bb209783 ("PCI/ATS: Remove unnecessary EXPORT_SYMBOL_GPL()")
unexported a bunch of symbols from the PCI core since the only external
users were non-modular IOMMU drivers. Although most of those symbols
can remain private for now, 'pci_{enable,disable_ats()' is required for
the ARM SMMUv3 driver to build as a module, otherwise we get a build
failure as follows:

  | ERROR: "pci_enable_ats" [drivers/iommu/arm-smmu-v3.ko] undefined!
  | ERROR: "pci_disable_ats" [drivers/iommu/arm-smmu-v3.ko] undefined!

Re-export these two functions so that the ARM SMMUv3 driver can be build
as a module.

Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
[will: rewrote commit message]
Signed-off-by: Will Deacon <will@kernel.org>
Tested-by: John Garry <john.garry@huawei.com> # smmu v3
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Greg Kroah-Hartman 2019-12-19 12:03:39 +00:00 committed by Joerg Roedel
parent 6bf6c24720
commit bb950bca5d
1 changed files with 2 additions and 0 deletions
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2
drivers/pci/ats.c
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@ -69,6 +69,7 @@ int pci_enable_ats(struct pci_dev *dev, int ps)
dev->ats_enabled = 1; dev->ats_enabled = 1;
return 0; return 0;
} }
EXPORT_SYMBOL_GPL(pci_enable_ats);
/** /**
* pci_disable_ats - disable the ATS capability * pci_disable_ats - disable the ATS capability
@ -87,6 +88,7 @@ void pci_disable_ats(struct pci_dev *dev)
dev->ats_enabled = 0; dev->ats_enabled = 0;
} }
EXPORT_SYMBOL_GPL(pci_disable_ats);
void pci_restore_ats_state(struct pci_dev *dev) void pci_restore_ats_state(struct pci_dev *dev)
{ {