On Mon, Dec 22, 2014 at 02:55:23PM +0200, Antti Palosaari wrote: > On 12/22/2014 02:44 PM, Mark Brown wrote: > >On Sun, Dec 21, 2014 at 12:34:51AM +0200, Antti Palosaari wrote: > >>I2C client and I2C adapter are using regmap. As a solution, add > >>configuration option to pass custom lock class key for lockdep > >>validator. > >Why is this configurable, how would a device know if the system it is in > >needs a custom locking class and can safely use one? > If RegMap instance is bus master, eg. I2C adapter, then you should define > own custom key. If you don't define own key and there will be slave on that > bus which uses RegMap too, there will be recursive locking from a lockdep > point of view. That doesn't really explain to me why this is configurable, why should drivers have to worry about this? Please also write technical terms like regmap normally.
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