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blk-mq: use HCTX_TYPE_DEFAULT but not 0 to index blk_mq_tag_set->map 

Replace set->map[0] with set->map[HCTX_TYPE_DEFAULT] to avoid hardcoding.

Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Dongli Zhang 2019-02-27 21:35:01 +08:00 committed by Jens Axboe
parent 5b88a17cfd
commit 7d76f8562f
1 changed files with 7 additions and 7 deletions
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14
block/blk-mq.c
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@ -2061,7 +2061,7 @@ struct blk_mq_tags *blk_mq_alloc_rq_map(struct blk_mq_tag_set *set,
struct blk_mq_tags *tags;
int node;
node = blk_mq_hw_queue_to_node(&set->map[0], hctx_idx);
node = blk_mq_hw_queue_to_node(&set->map[HCTX_TYPE_DEFAULT], hctx_idx);
if (node == NUMA_NO_NODE)
node = set->numa_node;
@ -2117,7 +2117,7 @@ int blk_mq_alloc_rqs(struct blk_mq_tag_set *set, struct blk_mq_tags *tags,
size_t rq_size, left;
int node;
node = blk_mq_hw_queue_to_node(&set->map[0], hctx_idx);
node = blk_mq_hw_queue_to_node(&set->map[HCTX_TYPE_DEFAULT], hctx_idx);
if (node == NUMA_NO_NODE)
node = set->numa_node;
@ -2416,7 +2416,7 @@ static void blk_mq_map_swqueue(struct request_queue *q)
* If the cpu isn't present, the cpu is mapped to first hctx.
*/
for_each_possible_cpu(i) {
hctx_idx = set->map[0].mq_map[i];
hctx_idx = set->map[HCTX_TYPE_DEFAULT].mq_map[i];
/* unmapped hw queue can be remapped after CPU topo changed */
if (!set->tags[hctx_idx] &&
!__blk_mq_alloc_rq_map(set, hctx_idx)) {
@ -2426,7 +2426,7 @@ static void blk_mq_map_swqueue(struct request_queue *q)
* case, remap the current ctx to hctx[0] which
* is guaranteed to always have tags allocated
*/
set->map[0].mq_map[i] = 0;
set->map[HCTX_TYPE_DEFAULT].mq_map[i] = 0;
}
ctx = per_cpu_ptr(q->queue_ctx, i);
@ -2733,7 +2733,7 @@ static void blk_mq_realloc_hw_ctxs(struct blk_mq_tag_set *set,
int node;
struct blk_mq_hw_ctx *hctx;
node = blk_mq_hw_queue_to_node(&set->map[0], i);
node = blk_mq_hw_queue_to_node(&set->map[HCTX_TYPE_DEFAULT], i);
/*
* If the hw queue has been mapped to another numa node,
* we need to realloc the hctx. If allocation fails, fallback
@ -2964,7 +2964,7 @@ static int blk_mq_update_queue_map(struct blk_mq_tag_set *set)
return set->ops->map_queues(set);
} else {
BUG_ON(set->nr_maps > 1);
return blk_mq_map_queues(&set->map[0]);
return blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
}
}
@ -3234,7 +3234,7 @@ fallback:
pr_warn("Increasing nr_hw_queues to %d fails, fallback to %d\n",
nr_hw_queues, prev_nr_hw_queues);
set->nr_hw_queues = prev_nr_hw_queues;
blk_mq_map_queues(&set->map[0]);
blk_mq_map_queues(&set->map[HCTX_TYPE_DEFAULT]);
goto fallback;
}
blk_mq_map_swqueue(q);