From: Luis Chamberlain <mcgrof@kernel.org>
To: bhelgaas@google.com, alex.williamson@redhat.com,
cohuck@redhat.com, jgg@ziepe.ca, kevin.tian@intel.com,
eric.auger@redhat.com, giovanni.cabiddu@intel.com,
mjrosato@linux.ibm.com, jannh@google.com, kvm@vger.kernel.org,
linux-pci@vger.kernel.org
Cc: minchan@kernel.org, gregkh@linuxfoundation.org, jeyu@kernel.org,
ngupta@vflare.org, sergey.senozhatsky.work@gmail.com,
mcgrof@kernel.org, axboe@kernel.dk, mbenes@suse.com,
jpoimboe@redhat.com, tglx@linutronix.de, keescook@chromium.org,
jikos@kernel.org, rostedt@goodmis.org, peterz@infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH 1/2] pci: export pci_dev_unlock() and the respective unlock
Date: Mon, 21 Jun 2021 17:03:09 -0700 [thread overview]
Message-ID: <20210622000310.728294-1-mcgrof@kernel.org> (raw)
Other places in the kernel use this form, and so just
provide a common path for it.
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(-)
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..c55368f58965 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1353,6 +1353,9 @@ int devm_request_pci_bus_resources(struct device *dev,
/* Temporary until new and working PCI SBR API in place */
int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
+int pci_dev_trylock(struct pci_dev *dev);
+void pci_dev_unlock(struct pci_dev *dev);
+
#define pci_bus_for_each_resource(bus, res, i) \
for (i = 0; \
(res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
--
2.30.2
next reply other threads:[~2021-06-22 0:03 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-22 0:03 Luis Chamberlain [this message]
2021-06-22 0:03 ` [PATCH 2/2] vfio: use the new pci_dev_trylock() helper to simplify try lock Luis Chamberlain
2021-06-22 7:45 ` [PATCH 1/2] pci: export pci_dev_unlock() and the respective unlock Niklas Schnelle
2021-06-22 14:57 ` Bjorn Helgaas
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