tree c2c9b083a67da5fb3901c3fee36ac91e15b0f6a3
parent 31a9f9cb495b468f3a93c4edaf8fccd65aa86f64
author Jens Axboe <axboe@kernel.dk> 1608250218 -0700
committer Jens Axboe <axboe@kernel.dk> 1608250258 -0700

src/queue: add comment on why reading SQ->head for flush isn't atomic

This has come up at least two times, add a comment there to explain
exactly why the code is fine as-is.

Fixes: https://github.com/axboe/liburing/issues/268
Signed-off-by: Jens Axboe <axboe@kernel.dk>