diff mbox series

[v2,1/2] PCI: Export pci_dev_trylock() and pci_dev_unlock()

Message ID 20210623022824.308041-2-mcgrof@kernel.org
State New
Headers show
Series vfio: export and make use of pci_dev_trylock() | expand

Commit Message

Luis Chamberlain June 23, 2021, 2:28 a.m. UTC 
Other places in the kernel use this form, and so just
provide a common path for it.

Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 drivers/pci/pci.c   | 6 ++++--
 include/linux/pci.h | 3 +++
 2 files changed, 7 insertions(+), 2 deletions(-)

Comments

Cornelia Huck June 23, 2021, 9:30 a.m. UTC | #1 
On Tue, Jun 22 2021, Luis Chamberlain <mcgrof@kernel.org> wrote:

> Other places in the kernel use this form, and so just
> provide a common path for it.
>
> Acked-by: Bjorn Helgaas <bhelgaas@google.com>
> Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
> ---
>  drivers/pci/pci.c   | 6 ++++--
>  include/linux/pci.h | 3 +++
>  2 files changed, 7 insertions(+), 2 deletions(-)

Reviewed-by: Cornelia Huck <cohuck@redhat.com>
diff mbox series

Patch

diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index f09821af1d2e..b1d9bb3f5ae2 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -5027,7 +5027,7 @@  static void pci_dev_lock(struct pci_dev *dev)
 }
 
 /* Return 1 on successful lock, 0 on contention */
-static int pci_dev_trylock(struct pci_dev *dev)
+int pci_dev_trylock(struct pci_dev *dev)
 {
 	if (pci_cfg_access_trylock(dev)) {
 		if (device_trylock(&dev->dev))
@@ -5037,12 +5037,14 @@  static int pci_dev_trylock(struct pci_dev *dev)
 
 	return 0;
 }
+EXPORT_SYMBOL_GPL(pci_dev_trylock);
 
-static void pci_dev_unlock(struct pci_dev *dev)
+void pci_dev_unlock(struct pci_dev *dev)
 {
 	device_unlock(&dev->dev);
 	pci_cfg_access_unlock(dev);
 }
+EXPORT_SYMBOL_GPL(pci_dev_unlock);
 
 static void pci_dev_save_and_disable(struct pci_dev *dev)
 {
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 6248e044dd29..d8f056f3a2e3 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1622,6 +1622,9 @@  void pci_cfg_access_lock(struct pci_dev *dev);
 bool pci_cfg_access_trylock(struct pci_dev *dev);
 void pci_cfg_access_unlock(struct pci_dev *dev);
 
+int pci_dev_trylock(struct pci_dev *dev);
+void pci_dev_unlock(struct pci_dev *dev);
+
 /*
  * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
  * a PCI domain is defined to be a set of PCI buses which share