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Diffstat (limited to 'block/blk-core.c')
-rw-r--r--block/blk-core.c31
1 files changed, 17 insertions, 14 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index b754a4a2f9b..6a9cc0d22a6 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -54,15 +54,16 @@ static DEFINE_PER_CPU(struct list_head, blk_cpu_done);
static void drive_stat_acct(struct request *rq, int new_io)
{
+ struct hd_struct *part;
int rw = rq_data_dir(rq);
if (!blk_fs_request(rq) || !rq->rq_disk)
return;
- if (!new_io) {
- __all_stat_inc(rq->rq_disk, merges[rw], rq->sector);
- } else {
- struct hd_struct *part = get_part(rq->rq_disk, rq->sector);
+ part = get_part(rq->rq_disk, rq->sector);
+ if (!new_io)
+ __all_stat_inc(rq->rq_disk, part, merges[rw], rq->sector);
+ else {
disk_round_stats(rq->rq_disk);
rq->rq_disk->in_flight++;
if (part) {
@@ -253,9 +254,11 @@ EXPORT_SYMBOL(__generic_unplug_device);
**/
void generic_unplug_device(struct request_queue *q)
{
- spin_lock_irq(q->queue_lock);
- __generic_unplug_device(q);
- spin_unlock_irq(q->queue_lock);
+ if (blk_queue_plugged(q)) {
+ spin_lock_irq(q->queue_lock);
+ __generic_unplug_device(q);
+ spin_unlock_irq(q->queue_lock);
+ }
}
EXPORT_SYMBOL(generic_unplug_device);
@@ -479,6 +482,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
kobject_init(&q->kobj, &blk_queue_ktype);
mutex_init(&q->sysfs_lock);
+ spin_lock_init(&q->__queue_lock);
return q;
}
@@ -541,10 +545,8 @@ blk_init_queue_node(request_fn_proc *rfn, spinlock_t *lock, int node_id)
* if caller didn't supply a lock, they get per-queue locking with
* our embedded lock
*/
- if (!lock) {
- spin_lock_init(&q->__queue_lock);
+ if (!lock)
lock = &q->__queue_lock;
- }
q->request_fn = rfn;
q->prep_rq_fn = NULL;
@@ -1536,10 +1538,11 @@ static int __end_that_request_first(struct request *req, int error,
}
if (blk_fs_request(req) && req->rq_disk) {
+ struct hd_struct *part = get_part(req->rq_disk, req->sector);
const int rw = rq_data_dir(req);
- all_stat_add(req->rq_disk, sectors[rw],
- nr_bytes >> 9, req->sector);
+ all_stat_add(req->rq_disk, part, sectors[rw],
+ nr_bytes >> 9, req->sector);
}
total_bytes = bio_nbytes = 0;
@@ -1725,8 +1728,8 @@ static void end_that_request_last(struct request *req, int error)
const int rw = rq_data_dir(req);
struct hd_struct *part = get_part(disk, req->sector);
- __all_stat_inc(disk, ios[rw], req->sector);
- __all_stat_add(disk, ticks[rw], duration, req->sector);
+ __all_stat_inc(disk, part, ios[rw], req->sector);
+ __all_stat_add(disk, part, ticks[rw], duration, req->sector);
disk_round_stats(disk);
disk->in_flight--;
if (part) {