f458a1453424 ("ring-buffer: Test last update in 32bit version of __rb_time_read()")
10464b4aa605 ("ring-buffer: Add rb_time_t 64 bit operations for speeding up 32 bit")
7c4b4a5164fb ("ring-buffer: Incorporate absolute timestamp into add_timestamp logic")
a389d86f7fd0 ("ring-buffer: Have nested events still record running time stamp")