diff options
| author | Jens Axboe <[email protected]> | 2017-10-04 11:22:24 -0600 |
|---|---|---|
| committer | Jens Axboe <[email protected]> | 2017-10-04 11:22:24 -0600 |
| commit | fc13457f74dcf054b0d17efb7b94b46fdf17f412 (patch) | |
| tree | b7a6a14246cf9e9c9967c7072d96a0010d117164 /tools/perf/scripts/python | |
| parent | a7af0af32171c17d881e3e58b0925c4a44fb5a42 (diff) | |
blk-mq: document the need to have STARTED and COMPLETED share a byte
For memory ordering guarantees on stores, we need to ensure that
these two bits share the same byte of storage in the unsigned
long. Add a comment as to why, and a BUILD_BUG_ON() to ensure that
we don't violate this requirement.
Suggested-by: Boqun Feng <[email protected]>
Signed-off-by: Jens Axboe <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python')
0 files changed, 0 insertions, 0 deletions