[PATCH 0/3 V2] ring-buffer: Restructure ftrace ring buffer time keeping to allow accurate nested timing

[Steven Rostedt]

V1 of this patch set can be found here:

 https://lore.kernel.org/r/20200627010041.517736087@xxxxxxxxxxx

Changes since V1 patch set:

 - Fixed white space issues (kernel test robot)
 - Fixed change log algorithm to match the code (Masami Hiramatsu)
 - Removed next_write useless code. (Masami Hiramatsu)


Head SHA1: 72c27b3e97be0b2fca6b5518d299bccbc714a245


Steven Rostedt (VMware) (3):
      ring-buffer: Have nested events still record running time stamp
      ring-buffer: Incorporate absolute timestamp into add_timestamp logic
      ring-buffer: Add rb_time_t 64 bit operations for speeding up 32 bit

----
 kernel/trace/ring_buffer.c | 498 ++++++++++++++++++++++++++++++++++++---------
 1 file changed, 401 insertions(+), 97 deletions(-)