[RFC,03/11] drivers: base: Make bus_add_device() public

Commit Message

Sergei Miroshnichenko Oct. 24, 2019, 5:21 p.m. UTC

Move the bus_add_device() to a public API, so it can be applied to devices
which are temporarily detached from their buses without being destroyed.

This will be used after changes in PCI topology after hotplugging a bridge:
buses may get their numbers changed, so their child devices must be
reattached and their sysfs and proc files recreated.

Signed-off-by: Sergey Miroshnichenko <[e-mail]>
---
 drivers/base/base.h    | 1 -
 drivers/base/bus.c     | 1 +
 include/linux/device.h | 2 ++
 3 files changed, 3 insertions(+), 1 deletion(-)

Patch

diff --git a/drivers/base/base.h b/drivers/base/base.h
index 0d32544b6f91..c93d302e6345 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -110,7 +110,6 @@  extern void container_dev_init(void);
 
 struct kobject *virtual_device_parent(struct device *dev);
 
-extern int bus_add_device(struct device *dev);
 extern void bus_probe_device(struct device *dev);
 extern void bus_remove_device(struct device *dev);
 
diff --git a/drivers/base/bus.c b/drivers/base/bus.c
index a1d1e8256324..8f3445cc533e 100644
--- a/drivers/base/bus.c
+++ b/drivers/base/bus.c
@@ -471,6 +471,7 @@  int bus_add_device(struct device *dev)
 	bus_put(dev->bus);
 	return error;
 }
+EXPORT_SYMBOL_GPL(bus_add_device);
 
 /**
  * bus_probe_device - probe drivers for a new device
diff --git a/include/linux/device.h b/include/linux/device.h
index 297239a08bb7..4d8bbc8ae73d 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -267,6 +267,8 @@  int bus_for_each_drv(struct bus_type *bus, struct device_driver *start,
 void bus_sort_breadthfirst(struct bus_type *bus,
 			   int (*compare)(const struct device *a,
 					  const struct device *b));
+extern int bus_add_device(struct device *dev);
+
 /*
  * Bus notifiers: Get notified of addition/removal of devices
  * and binding/unbinding of drivers to devices.