On Monday 25 January 2010, Anton Vorontsov wrote:

+config GPIOLIB_NOTIFIER
+       bool
+       help
+         This symbol is selected by subsystems that need to handle GPIO
+         chips addition and removal. E.g., this is used for the
+         OpenFirmware bindings.
+

I'm no huge fan of notifiers, but I suppose they have their place.

However ... I don't see a lot of win to making this optional.  Just
inline the little two blocking_notifier_call_chain() calls directly,
making this a *LOT* simpler.

- Dave