unlocked_ioctl explanation

Tue May 17 23:23:39 EDT 2011

I am aware that ioctl has been superseeded by unlocked_ioctl. I've been looking through patches and this seems to be BKL related.

Could someone explain further the differences and reasons for the new ioctl prototype and name?

I guess 'unlocked' means BKL is no longer held inside ioctl, right? 

What precautions should we take when using unlocked_ioctl ?

Greetings,
Ezequiel.
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