[PATCH] ring-buffer: Check if absolute timestamp goes backwards

From: "Steven Rostedt (Google)" The check_buffer() which checks the timestamps of the ring buffer sub-buffer page, when enabled, only checks if the adding of deltas of the events from the last absolute timestamp or the timestamp of the sub-buffer page adds up to the current event. What it does

[PATCH] ring-buffer: Check if absolute timestamp goes backwards

From: "Steven Rostedt (Google)" The check_buffer() which checks the timestamps of the ring buffer sub-buffer page, when enabled, only checks if the adding of deltas of the events from the last absolute timestamp or the timestamp of the sub-buffer page adds up to the current event. What it does