[Xen-devel] [PATCH 1/4] PCI: introduce helper functions for device flag operation

[Ethan Zhao <ethan.zhao@xxxxxxxxxx>]

This patch introduced three helper functions to hide direct
device flag operation.

void pci_set_dev_assigned(struct pci_dev *pdev);
void pci_clear_dev_assigned(struct pci_dev *pdev);
bool pci_is_dev_assigned(struct pci_dev *pdev);

Signed-off-by: Ethan Zhao <ethan.zhao@xxxxxxxxxx>
---
 v2: simplify unnecessory ternary operation in function pci_is_dev_assigned();
 v3: amend helper functions naming.
---
 include/linux/pci.h |   13 +++++++++++++
 1 files changed, 13 insertions(+), 0 deletions(-)

diff --git a/include/linux/pci.h b/include/linux/pci.h
index 466bcd1..b610ab3 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1829,4 +1829,17 @@ int pci_for_each_dma_alias(struct pci_dev *pdev,
  */
 struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
 
+/* helper functions for operation of device flag */
+static inline void pci_set_dev_assigned(struct pci_dev *pdev)
+{
+       pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
+}
+static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
+{
+       pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
+}
+static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
+{
+       return pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED;
+}
 #endif /* LINUX_PCI_H */
-- 
1.7.1


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