linux-kernel - [RFC PATCH v4 01/10] driver core: export driver_probe

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Date:	Sat,  8 Feb 2014 18:29:31 +0100
From:	Antonios Motakis <a.motakis@...tualopensystems.com>
To:	alex.williamson@...hat.com, kvmarm@...ts.cs.columbia.edu,
	iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
	gregkh@...uxfoundation.org
Cc:	tech@...tualopensystems.com, a.rigo@...tualopensystems.com,
	B08248@...escale.com, kim.phillips@...aro.org,
	jan.kiszka@...mens.com, kvm@...r.kernel.org, R65777@...escale.com,
	B07421@...escale.com, christoffer.dall@...aro.org, agraf@...e.de,
	B16395@...escale.com, will.deacon@....com,
	Tejun Heo <tj@...nel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Toshi Kani <toshi.kani@...com>, Joe Perches <joe@...ches.com>,
	Dmitry Kasatkin <d.kasatkin@...sung.com>,
	Michal Hocko <mhocko@...e.cz>,
	Bjorn Helgaas <bhelgaas@...gle.com>
Subject: [RFC PATCH v4 01/10] driver core: export driver_probe_device()

From: Kim Phillips <kim.phillips@...aro.org>

Needed by drivers, such as the vfio platform driver [1], seeking to
bypass bind_store()'s driver_match_device(), and bind to any device
via a private sysfs bind file.

[1] https://lkml.org/lkml/2013/12/11/522

note: the EXPORT_SYMBOL is needed because vfio-platform can be built
as a module.

Signed-off-by: Kim Phillips <kim.phillips@...aro.org>
---
 drivers/base/base.h    | 1 -
 drivers/base/dd.c      | 1 +
 include/linux/device.h | 1 +
 3 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/base/base.h b/drivers/base/base.h
index 24f4242..fe25ad87 100644
--- a/drivers/base/base.h
+++ b/drivers/base/base.h
@@ -112,7 +112,6 @@ extern int bus_add_driver(struct device_driver *drv);
 extern void bus_remove_driver(struct device_driver *drv);
 
 extern void driver_detach(struct device_driver *drv);
-extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 extern void driver_deferred_probe_del(struct device *dev);
 static inline int driver_match_device(struct device_driver *drv,
 				      struct device *dev)
diff --git a/drivers/base/dd.c b/drivers/base/dd.c
index 0605176..44f6184 100644
--- a/drivers/base/dd.c
+++ b/drivers/base/dd.c
@@ -384,6 +384,7 @@ int driver_probe_device(struct device_driver *drv, struct device *dev)
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(driver_probe_device);
 
 static int __device_attach(struct device_driver *drv, void *data)
 {
diff --git a/include/linux/device.h b/include/linux/device.h
index 952b010..ad80dd2 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -257,6 +257,7 @@ extern struct device_driver *driver_find(const char *name,
 					 struct bus_type *bus);
 extern int driver_probe_done(void);
 extern void wait_for_device_probe(void);
+extern int driver_probe_device(struct device_driver *drv, struct device *dev);
 
 
 /* sysfs interface for exporting driver attributes */
-- 
1.8.3.2

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