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device: Add dev_of_node() accessor 

Suggested by Arnd Bergmann, this gives a practical accessor for
the of_node field of struct device while instructing the compiler
that it will be NULL if CONFIG_OF is not set.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Benjamin Herrenschmidt 2015-02-17 19:03:41 -06:00 committed by Greg Kroah-Hartman
parent ef518cc8aa
commit e8a51e1b51
1 changed files with 7 additions and 0 deletions
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7
include/linux/device.h
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@ -916,6 +916,13 @@ static inline void device_lock_assert(struct device *dev)
lockdep_assert_held(&dev->mutex);
}
static inline struct device_node *dev_of_node(struct device *dev)
{
if (!IS_ENABLED(CONFIG_OF))
return NULL;
return dev->of_node;
}
void driver_init(void);
/*