summaryrefslogtreecommitdiff
path: root/block/blk-sysfs.c
diff options
context:
space:
mode:
Diffstat (limited to 'block/blk-sysfs.c')
-rw-r--r--block/blk-sysfs.c35
1 files changed, 11 insertions, 24 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 370d83c18057..614d9d47de36 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -88,9 +88,11 @@ queue_requests_store(struct request_queue *q, const char *page, size_t count)
static ssize_t queue_ra_show(struct request_queue *q, char *page)
{
- unsigned long ra_kb = q->backing_dev_info->ra_pages <<
- (PAGE_SHIFT - 10);
+ unsigned long ra_kb;
+ if (!q->disk)
+ return -EINVAL;
+ ra_kb = q->disk->bdi->ra_pages << (PAGE_SHIFT - 10);
return queue_var_show(ra_kb, page);
}
@@ -98,13 +100,14 @@ static ssize_t
queue_ra_store(struct request_queue *q, const char *page, size_t count)
{
unsigned long ra_kb;
- ssize_t ret = queue_var_store(&ra_kb, page, count);
+ ssize_t ret;
+ if (!q->disk)
+ return -EINVAL;
+ ret = queue_var_store(&ra_kb, page, count);
if (ret < 0)
return ret;
-
- q->backing_dev_info->ra_pages = ra_kb >> (PAGE_SHIFT - 10);
-
+ q->disk->bdi->ra_pages = ra_kb >> (PAGE_SHIFT - 10);
return ret;
}
@@ -251,7 +254,8 @@ queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
spin_lock_irq(&q->queue_lock);
q->limits.max_sectors = max_sectors_kb << 1;
- q->backing_dev_info->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10);
+ if (q->disk)
+ q->disk->bdi->io_pages = max_sectors_kb >> (PAGE_SHIFT - 10);
spin_unlock_irq(&q->queue_lock);
return ret;
@@ -766,13 +770,6 @@ static void blk_exit_queue(struct request_queue *q)
* e.g. blkcg_print_blkgs() to crash.
*/
blkcg_exit_queue(q);
-
- /*
- * Since the cgroup code may dereference the @q->backing_dev_info
- * pointer, only decrease its reference count after having removed the
- * association with the block cgroup controller.
- */
- bdi_put(q->backing_dev_info);
}
/**
@@ -859,15 +856,6 @@ int blk_register_queue(struct gendisk *disk)
struct device *dev = disk_to_dev(disk);
struct request_queue *q = disk->queue;
- if (WARN_ON(!q))
- return -ENXIO;
-
- WARN_ONCE(blk_queue_registered(q),
- "%s is registering an already registered queue\n",
- kobject_name(&dev->kobj));
-
- blk_queue_update_readahead(q);
-
ret = blk_trace_init_sysfs(dev);
if (ret)
return ret;
@@ -941,7 +929,6 @@ unlock:
return ret;
}
-EXPORT_SYMBOL_GPL(blk_register_queue);
/**
* blk_unregister_queue - counterpart of blk_register_queue()