Messages in this thread |  | | Date | Mon, 24 Feb 2014 12:04:27 +0100 | From | Alessandro Zummo <> | Subject | Re: kernfs/rtc: circular dependency between kernfs and ops_lock |
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On Sat, 22 Feb 2014 15:52:17 -0500 Tejun Heo <tj@kernel.org> 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.
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Best regards,
Alessandro Zummo, Tower Technologies - Torino, Italy
http://www.towertech.it
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