[RESEND][PATCH v2 0/2] Fix misuse of blk_rq_stats in blk-iolatency

[Pavel Begunkov (Silence)]

From: Pavel Begunkov <asml.silence@xxxxxxxxx>

There are implicit assumptions about struct blk_rq_stats, which make
it's very easy to misuse. The first patch fixes a bug caused by that.
The second employs type-system to prevent recurrences.

v2: rebase + reformulate commit messages (no code changes)

Acked-by: Josef Bacik <josef@xxxxxxxxxxxxxx>

Pavel Begunkov (2):
  blk-iolatency: Fix zero mean in previous stats
  blk-stats: Introduce explicit stat staging buffers

 block/blk-iolatency.c     | 60 ++++++++++++++++++++++++++++++---------
 block/blk-stat.c          | 48 +++++++++++++++++++++++--------
 block/blk-stat.h          |  9 ++++--
 include/linux/blk_types.h |  6 ++++
 4 files changed, 94 insertions(+), 29 deletions(-)

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2.22.0