Re: [PATCH v3 3/5] gpiolib: cdev: reduce locking in gpio_desc_to_lineinfo()

Andy Shevchenko
2023-12-15T16:36:35Z

On Fri, Dec 15, 2023 at 10:38:03AM +0800, Kent Gibson wrote:
> Reduce the time holding the gpio_lock by snapshotting the desc flags,
> rather than testing them individually while holding the lock.
>
> Accept that the calculation of the used field is inherently racy, and
> only check the availability of the line from pinctrl if other checks
> pass, so avoiding the check for lines that are otherwise in use.

Just wondering if you are using --histogram (diff algo) when preparing
the patches...

--
With Best Regards,
Andy Shevchenko