diff options
| -rw-r--r-- | block/blk-mq-sysfs.c | 4 | ||||
| -rw-r--r-- | block/blk-mq.c | 7 |
2 files changed, 7 insertions, 4 deletions
diff --git a/block/blk-mq-sysfs.c b/block/blk-mq-sysfs.c index 189f5ae6522a..788fffd9b409 100644 --- a/block/blk-mq-sysfs.c +++ b/block/blk-mq-sysfs.c @@ -229,8 +229,6 @@ static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page) unsigned int i, first = 1; ssize_t ret = 0; - blk_mq_disable_hotplug(); - for_each_cpu(i, hctx->cpumask) { if (first) ret += sprintf(ret + page, "%u", i); @@ -240,8 +238,6 @@ static ssize_t blk_mq_hw_sysfs_cpus_show(struct blk_mq_hw_ctx *hctx, char *page) first = 0; } - blk_mq_enable_hotplug(); - ret += sprintf(ret + page, "\n"); return ret; } diff --git a/block/blk-mq.c b/block/blk-mq.c index a5dbd069c9da..31c0c6259c4c 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -1797,6 +1797,11 @@ static void blk_mq_map_swqueue(struct request_queue *q, struct blk_mq_ctx *ctx; struct blk_mq_tag_set *set = q->tag_set; + /* + * Avoid others reading imcomplete hctx->cpumask through sysfs + */ + mutex_lock(&q->sysfs_lock); + queue_for_each_hw_ctx(q, hctx, i) { cpumask_clear(hctx->cpumask); hctx->nr_ctx = 0; @@ -1816,6 +1821,8 @@ static void blk_mq_map_swqueue(struct request_queue *q, hctx->ctxs[hctx->nr_ctx++] = ctx; } + mutex_unlock(&q->sysfs_lock); + queue_for_each_hw_ctx(q, hctx, i) { struct blk_mq_ctxmap *map = &hctx->ctx_map; |