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authorBjorn Helgaas <bhelgaas@google.com>2013-09-24 15:14:57 -0600
committerBjorn Helgaas <bhelgaas@google.com>2013-09-25 15:43:58 -0600
commit77a0dfcd8a4d9a93a21c8be56eaeb65cd69b351d (patch)
tree78fc61e77d3976560185ac61c7944755a7009502 /drivers/pci
parent2ba29e270e977b213a7d58ae1152c23a1c3074a3 (diff)
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PCI: Document reason for using pci_is_root_bus()
Some code assumes "bus->self == NULL" means the bus is a root bus. This adds a comment explaining why this is incorrect ("virtual" buses added for SR-IOV have "bus->self == NULL" but are not root buses). No functional change. Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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