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SubjectRe: kernfs/rtc: circular dependency between kernfs and ops_lock
On 02/24/2014 06:04 AM, Alessandro Zummo wrote:
> On Sat, 22 Feb 2014 15:52:17 -0500
> Tejun Heo <> wrote:
>> The problem is rtc_device_unregister(). It grabs rtc->ops_lock and
>> then tries to remove the sysfs files. Some of those sysfs file
>> implementations acquire rtc->ops_lock, so it of course can lead to
>> deadlocks. One can't try to delete a sysfs file which acquires a lock
>> while holding the same lock.
> Pretty interesting indeed. One option would be to remove
> the sys files before acquiring the lock. But I wonder
> if this could lead to other issues.

Ping? Seems this thing got lost.


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