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1d333ef3d5
The current implementation of the event queue both wastes space using a doubly linked list and isn't super obvious in how it behaves. This converts the queue to an actual circular buffer. The size of the queue is a tunable module parameter. This also fixes a few other things: - A memory leak that occurred when the ACPI device was removed, but the events were not freed from the queue. - Now kfree() the oldest event from outside all locks. - Add newline to logging messages. - Add helper macros to calculate size of events. - Remove unneeded lock around a check for dev_data->exist in hangup_device(). - Remove an unneeded null event pointer check in enqueue_events(). - Correct some comments. Signed-off-by: Nick Crews <ncrews@chromium.org> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>