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driver core: Provide an wrapper around the mutex to do lockdep warnings 

Instead of open-coding it in drivers that want to double check
that their functions are indeed holding the device lock.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Suggested-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
This commit is contained in:
Konrad Rzeszutek Wilk 2014-12-03 16:40:27 -05:00 committed by David Vrabel
parent e8801a7418
commit ac8010221d
2 changed files with 6 additions and 1 deletions
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2
drivers/xen/xen-pciback/pci_stub.c
View File

@ -278,7 +278,7 @@ void pcistub_put_pci_dev(struct pci_dev *dev)
/* Cleanup our device
* (so it's ready for the next domain)
*/
lockdep_assert_held(&dev->dev.mutex);
device_lock_assert(&dev->dev);
__pci_reset_function_locked(dev);
pci_restore_state(dev);

5
include/linux/device.h
View File

@ -911,6 +911,11 @@ static inline void device_unlock(struct device *dev)
mutex_unlock(&dev->mutex);
}
static inline void device_lock_assert(struct device *dev)
{
lockdep_assert_held(&dev->mutex);
}
void driver_init(void);
/*