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>

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 2758129..0269d44 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -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));
 

diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h
index 460798d..8efcf49 100644 (file)
--- a/include/linux/blk-mq.h
+++ b/include/linux/blk-mq.h
@@ -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 {