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blk-mq: rename blk_mq_hw_ctx->queue_rq_srcu to ->srcu 

The RCU protection has been expanded to cover both queueing and
completion paths making ->queue_rq_srcu a misnomer.  Rename it to
->srcu as suggested by Bart.

Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Bart Van Assche <Bart.VanAssche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Tejun Heo 2018-01-09 08:29:53 -08:00 committed by Jens Axboe
parent 5a61c36398
commit 05707b64ae
2 changed files with 8 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
block/blk-mq.c
View File

@ -219,7 +219,7 @@ void blk_mq_quiesce_queue(struct request_queue *q)
queue_for_each_hw_ctx(q, hctx, i) {
if (hctx->flags & BLK_MQ_F_BLOCKING)
synchronize_srcu(hctx->queue_rq_srcu);
synchronize_srcu(hctx->srcu);
else
rcu = true;
}
@ -564,7 +564,7 @@ static void hctx_unlock(struct blk_mq_hw_ctx *hctx, int srcu_idx)
if (!(hctx->flags & BLK_MQ_F_BLOCKING))
rcu_read_unlock();
else
srcu_read_unlock(hctx->queue_rq_srcu, srcu_idx);
srcu_read_unlock(hctx->srcu, srcu_idx);
}
static void hctx_lock(struct blk_mq_hw_ctx *hctx, int *srcu_idx)
@ -572,7 +572,7 @@ static void hctx_lock(struct blk_mq_hw_ctx *hctx, int *srcu_idx)
if (!(hctx->flags & BLK_MQ_F_BLOCKING))
rcu_read_lock();
else
*srcu_idx = srcu_read_lock(hctx->queue_rq_srcu);
*srcu_idx = srcu_read_lock(hctx->srcu);
}
static void blk_mq_rq_update_aborted_gstate(struct request *rq, u64 gstate)
@ -937,7 +937,7 @@ static void blk_mq_timeout_work(struct work_struct *work)
if (!(hctx->flags & BLK_MQ_F_BLOCKING))
has_rcu = true;
else
synchronize_srcu(hctx->queue_rq_srcu);
synchronize_srcu(hctx->srcu);
hctx->nr_expired = 0;
}
@ -2101,7 +2101,7 @@ static void blk_mq_exit_hctx(struct request_queue *q,
set->ops->exit_hctx(hctx, hctx_idx);
if (hctx->flags & BLK_MQ_F_BLOCKING)
cleanup_srcu_struct(hctx->queue_rq_srcu);
cleanup_srcu_struct(hctx->srcu);
blk_mq_remove_cpuhp(hctx);
blk_free_flush_queue(hctx->fq);
@ -2174,7 +2174,7 @@ static int blk_mq_init_hctx(struct request_queue *q,
goto free_fq;
if (hctx->flags & BLK_MQ_F_BLOCKING)
init_srcu_struct(hctx->queue_rq_srcu);
init_srcu_struct(hctx->srcu);
blk_mq_debugfs_register_hctx(q, hctx);
@ -2463,7 +2463,7 @@ static int blk_mq_hw_ctx_size(struct blk_mq_tag_set *tag_set)
{
int hw_ctx_size = sizeof(struct blk_mq_hw_ctx);
BUILD_BUG_ON(ALIGN(offsetof(struct blk_mq_hw_ctx, queue_rq_srcu),
BUILD_BUG_ON(ALIGN(offsetof(struct blk_mq_hw_ctx, srcu),
__alignof__(struct blk_mq_hw_ctx)) !=
sizeof(struct blk_mq_hw_ctx));

2
include/linux/blk-mq.h
View File

@ -66,7 +66,7 @@ struct blk_mq_hw_ctx {
#endif
/* Must be the last member - see also blk_mq_hw_ctx_size(). */
struct srcu_struct queue_rq_srcu[0];
struct srcu_struct srcu[0];
};
struct blk_mq_tag_set {