Re: [PATCH] regmap: allow to disable all locking mechanisms

From: Lars-Peter Clausen
Date: Tue Dec 12 2017 - 06:42:59 EST


On 12/06/2017 03:26 PM, Bartosz Golaszewski wrote:
[...]
> + * @disable_locking: This regmap is either protected by external means or
> + * is guaranteed not be be accessed from multiple threads.

To guarantee this you need to make sure that a regmap instance with this
flag set does not register a debugfs interface. debugfs file access happens
from a userspace process and hence could (and probably) is in a different
thread than the driver regmap access.