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| author | Jens Axboe <axboe@kernel.dk> | 2018-08-20 13:20:50 -0600 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-08-22 15:07:31 -0600 |
| commit | b78820937b4762b7d30b807d7156bec1d89e4dd3 (patch) | |
| tree | a4500f662f1f18e496ae7660e6daca5307b82d3a /block/blk-wbt.c | |
| parent | ffa358dcaae1f2f00926484e712e06daa8953cb4 (diff) | |
| download | lwn-b78820937b4762b7d30b807d7156bec1d89e4dd3.tar.gz lwn-b78820937b4762b7d30b807d7156bec1d89e4dd3.zip | |
blk-wbt: use wq_has_sleeper() for wq active check
We need the memory barrier before checking the list head,
use the appropriate helper for this. The matching queue
side memory barrier is provided by set_current_state().
Tested-by: Anchal Agarwal <anchalag@amazon.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-wbt.c')
| -rw-r--r-- | block/blk-wbt.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/block/blk-wbt.c b/block/blk-wbt.c index 1dd7edce7a99..853e22492f4e 100644 --- a/block/blk-wbt.c +++ b/block/blk-wbt.c @@ -118,7 +118,7 @@ static void rwb_wake_all(struct rq_wb *rwb) for (i = 0; i < WBT_NUM_RWQ; i++) { struct rq_wait *rqw = &rwb->rq_wait[i]; - if (waitqueue_active(&rqw->wait)) + if (wq_has_sleeper(&rqw->wait)) wake_up_all(&rqw->wait); } } @@ -162,7 +162,7 @@ static void __wbt_done(struct rq_qos *rqos, enum wbt_flags wb_acct) if (inflight && inflight >= limit) return; - if (waitqueue_active(&rqw->wait)) { + if (wq_has_sleeper(&rqw->wait)) { int diff = limit - inflight; if (!inflight || diff >= rwb->wb_background / 2) @@ -493,8 +493,8 @@ static void __wbt_wait(struct rq_wb *rwb, enum wbt_flags wb_acct, struct rq_wait *rqw = get_rq_wait(rwb, wb_acct); DECLARE_WAITQUEUE(wait, current); - if (!waitqueue_active(&rqw->wait) - && rq_wait_inc_below(rqw, get_limit(rwb, rw))) + if (!wq_has_sleeper(&rqw->wait) && + rq_wait_inc_below(rqw, get_limit(rwb, rw))) return; add_wait_queue_exclusive(&rqw->wait, &wait); |