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Date: Wed, 8 Aug 2012 00:11:01 +0800
From: Jiang Liu <liuj97@...il.com>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
Don Dutile <ddutile@...hat.com>,
Yinghai Lu <yinghai@...nel.org>,
Greg KH <gregkh@...uxfoundation.org>,
Kenji Kaneshige <kaneshige.kenji@...fujitsu.com>
Cc: Jiang Liu <jiang.liu@...wei.com>,
Taku Izumi <izumi.taku@...fujitsu.com>,
"Rafael J . Wysocki" <rjw@...k.pl>,
Yijing Wang <wangyijing@...wei.com>,
Xinwei Hu <huxinwei@...wei.com>, linux-kernel@...r.kernel.org,
linux-pci@...r.kernel.org, Jiang Liu <liuj97@...il.com>
Subject: [RFC PATCH v1 21/22] PCI: cleanups for PCI bus lock implementation
Now all Archs have been converted to the new PCI bus lock mechanism,
so clean up unused code.
Signed-off-by: Jiang Liu <liuj97@...il.com>
---
drivers/pci/Kconfig | 3 ---
drivers/pci/bus.c | 1 -
drivers/pci/pci-sysfs.c | 9 ---------
drivers/pci/probe.c | 4 +---
include/linux/pci.h | 10 ----------
5 files changed, 1 insertion(+), 26 deletions(-)
diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
index 5a796c0..848bfb8 100644
--- a/drivers/pci/Kconfig
+++ b/drivers/pci/Kconfig
@@ -120,6 +120,3 @@ config PCI_IOAPIC
config PCI_LABEL
def_bool y if (DMI || ACPI)
select NLS
-
-config PCI_BUS_LOCK
- def_bool y if (X86 || IA64)
diff --git a/drivers/pci/bus.c b/drivers/pci/bus.c
index 371f20a..308c376 100644
--- a/drivers/pci/bus.c
+++ b/drivers/pci/bus.c
@@ -196,7 +196,6 @@ int pci_bus_add_child(struct pci_bus *bus)
pci_create_legacy_files(bus);
pci_bus_change_state(bus, PCI_BUS_STATE_INITIALIZED,
PCI_BUS_STATE_WORKING, false);
- bus->is_added = 1;
}
}
diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c
index 11043b4..a5a4195 100644
--- a/drivers/pci/pci-sysfs.c
+++ b/drivers/pci/pci-sysfs.c
@@ -284,7 +284,6 @@ msi_bus_store(struct device *dev, struct device_attribute *attr,
}
#ifdef CONFIG_HOTPLUG
-static DEFINE_MUTEX(pci_remove_rescan_mutex);
static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
size_t count)
{
@@ -296,13 +295,11 @@ static ssize_t bus_rescan_store(struct bus_type *bus, const char *buf,
if (val) {
pci_host_bridge_hotplug_lock();
- mutex_lock(&pci_remove_rescan_mutex);
while ((b = pci_find_next_bus(b)) != NULL)
if (pci_bus_lock_states(b, PCI_BUS_STATE_WORKING) > 0) {
pci_rescan_bus(b);
pci_bus_unlock(b);
}
- mutex_unlock(&pci_remove_rescan_mutex);
pci_host_bridge_hotplug_unlock();
}
return count;
@@ -326,13 +323,11 @@ dev_rescan_store(struct device *dev, struct device_attribute *attr,
if (val) {
struct pci_bus *bus = pdev->bus;
- mutex_lock(&pci_remove_rescan_mutex);
if (pci_bus_lock_states(bus, PCI_BUS_STATE_WORKING) > 0) {
if (pdev->is_added)
pci_rescan_bus(bus);
pci_bus_unlock(bus);
}
- mutex_unlock(&pci_remove_rescan_mutex);
}
return count;
}
@@ -342,13 +337,11 @@ static void remove_callback(struct device *dev)
struct pci_dev *pdev = to_pci_dev(dev);
struct pci_bus *bus = pdev->bus;
- mutex_lock(&pci_remove_rescan_mutex);
if (pci_bus_lock_states(bus, PCI_BUS_STATE_WORKING) > 0) {
pci_bus_get(bus);
pci_stop_and_remove_bus_device(pdev);
pci_unlock_and_put_bus(bus);
}
- mutex_unlock(&pci_remove_rescan_mutex);
}
static ssize_t
@@ -382,14 +375,12 @@ dev_bus_rescan_store(struct device *dev, struct device_attribute *attr,
return -EINVAL;
if (val) {
- mutex_lock(&pci_remove_rescan_mutex);
if (!pci_is_root_bus(bus))
pci_rescan_bus_bridge_resize(bus->self);
else if (pci_bus_lock_states(bus, PCI_BUS_STATE_WORKING) > 0) {
pci_rescan_bus(bus);
pci_bus_unlock(bus);
}
- mutex_unlock(&pci_remove_rescan_mutex);
}
return count;
}
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index da6f04c..09517c3 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -1626,11 +1626,9 @@ unsigned int __devinit pci_scan_child_bus(struct pci_bus *bus)
if (pci_bus_get_state(bus) < PCI_BUS_STATE_WORKING) {
dev_dbg(&bus->dev, "fixups for bus\n");
pcibios_fixup_bus(bus);
- if (pci_is_root_bus(bus)) {
+ if (pci_is_root_bus(bus))
pci_bus_change_state(bus, PCI_BUS_STATE_REGISTERED,
PCI_BUS_STATE_WORKING, false);
- bus->is_added = 1;
- }
}
for (pass=0; pass < 2; pass++)
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 9e52e88..0e50ec8 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -442,7 +442,6 @@ struct pci_bus {
struct device dev;
struct bin_attribute *legacy_io; /* legacy I/O for this bus */
struct bin_attribute *legacy_mem; /* legacy mem */
- unsigned int is_added:1;
atomic_t state;
};
@@ -463,21 +462,12 @@ struct pci_bus {
#define PCI_BUS_STATE_DESTROYED 0x40 /* invalid state */
#define PCI_BUS_STATE_MASK 0x7F
-#ifdef CONFIG_PCI_BUS_LOCK
#define PCI_BUS_STATE_LOCK 0x10000 /* for pci core only */
static inline bool pci_bus_is_locked(struct pci_bus *bus)
{
return !!(atomic_read(&bus->state) & PCI_BUS_STATE_LOCK);
}
-#else /* CONFIG_PCI_BUS_LOCK */
-#define PCI_BUS_STATE_LOCK 0x0000 /* for pci core only */
-
-static inline bool pci_bus_is_locked(struct pci_bus *bus)
-{
- return true;
-}
-#endif /* CONFIG_PCI_BUS_LOCK */
static inline int pci_bus_get_state(struct pci_bus *bus)
{
--
1.7.9.5
--
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