diff options
Diffstat (limited to 'block/blk-stat.c')
| -rw-r--r-- | block/blk-stat.c | 23 |
1 files changed, 2 insertions, 21 deletions
diff --git a/block/blk-stat.c b/block/blk-stat.c index c6ca16abf911..7ff76ae6c76a 100644 --- a/block/blk-stat.c +++ b/block/blk-stat.c @@ -6,7 +6,6 @@ */ #include <linux/kernel.h> #include <linux/rculist.h> -#include <linux/blk-mq.h> #include "blk-stat.h" #include "blk-mq.h" @@ -190,7 +189,7 @@ void blk_stat_disable_accounting(struct request_queue *q) unsigned long flags; spin_lock_irqsave(&q->stats->lock, flags); - if (!--q->stats->accounting) + if (!--q->stats->accounting && list_empty(&q->stats->callbacks)) blk_queue_flag_clear(QUEUE_FLAG_STATS, q); spin_unlock_irqrestore(&q->stats->lock, flags); } @@ -201,7 +200,7 @@ void blk_stat_enable_accounting(struct request_queue *q) unsigned long flags; spin_lock_irqsave(&q->stats->lock, flags); - if (!q->stats->accounting++) + if (!q->stats->accounting++ && list_empty(&q->stats->callbacks)) blk_queue_flag_set(QUEUE_FLAG_STATS, q); spin_unlock_irqrestore(&q->stats->lock, flags); } @@ -231,21 +230,3 @@ void blk_free_queue_stats(struct blk_queue_stats *stats) kfree(stats); } - -bool blk_stats_alloc_enable(struct request_queue *q) -{ - struct blk_rq_stat *poll_stat; - - poll_stat = kcalloc(BLK_MQ_POLL_STATS_BKTS, sizeof(*poll_stat), - GFP_ATOMIC); - if (!poll_stat) - return false; - - if (cmpxchg(&q->poll_stat, NULL, poll_stat) != NULL) { - kfree(poll_stat); - return true; - } - - blk_stat_add_callback(q, q->poll_cb); - return false; -} |