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authorMartin Wilck <mwilck@suse.com>2019-03-27 14:51:01 +0100
committerJens Axboe <axboe@kernel.dk>2019-04-12 13:35:22 -0600
commit673387a930059fc4ad8060847a1d46f94e702281 (patch)
treeeb69068301eb39d33239efd75b3d3b9a5777702f
parent52d52d1c98a90cfe860b83498e4b6074aad95c15 (diff)
block: genhd: remove async_events field
The async_events field, intended to be used for drivers that support asynchronous notifications about disk events (aka media change events), isn't currently used by any driver, and apparently that has been that way for a long time (if not forever). Remove it. Reviewed-by: Hannes Reinecke <hare@suse.de> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin Wilck <mwilck@suse.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
-rw-r--r--block/genhd.c10
-rw-r--r--drivers/block/pktcdvd.c1
-rw-r--r--include/linux/genhd.h1
3 files changed, 4 insertions, 8 deletions
diff --git a/block/genhd.c b/block/genhd.c
index 703267865f14..ee76de0fb4cc 100644
--- a/block/genhd.c
+++ b/block/genhd.c
@@ -1628,12 +1628,11 @@ static unsigned long disk_events_poll_jiffies(struct gendisk *disk)
/*
* If device-specific poll interval is set, always use it. If
- * the default is being used, poll iff there are events which
- * can't be monitored asynchronously.
+ * the default is being used, poll if the POLL flag is set.
*/
if (ev->poll_msecs >= 0)
intv_msecs = ev->poll_msecs;
- else if (disk->events & ~disk->async_events)
+ else if (disk->events)
intv_msecs = disk_events_dfl_poll_msecs;
return msecs_to_jiffies(intv_msecs);
@@ -1860,6 +1859,7 @@ static void disk_check_events(struct disk_events *ev,
*
* events : list of all supported events
* events_async : list of events which can be detected w/o polling
+ * (always empty, only for backwards compatibility)
* events_poll_msecs : polling interval, 0: disable, -1: system default
*/
static ssize_t __disk_events_show(unsigned int events, char *buf)
@@ -1890,9 +1890,7 @@ static ssize_t disk_events_show(struct device *dev,
static ssize_t disk_events_async_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- struct gendisk *disk = dev_to_disk(dev);
-
- return __disk_events_show(disk->async_events, buf);
+ return 0;
}
static ssize_t disk_events_poll_msecs_show(struct device *dev,
diff --git a/drivers/block/pktcdvd.c b/drivers/block/pktcdvd.c
index f5a71023f76c..024060165afa 100644
--- a/drivers/block/pktcdvd.c
+++ b/drivers/block/pktcdvd.c
@@ -2761,7 +2761,6 @@ static int pkt_setup_dev(dev_t dev, dev_t* pkt_dev)
/* inherit events of the host device */
disk->events = pd->bdev->bd_disk->events;
- disk->async_events = pd->bdev->bd_disk->async_events;
add_disk(disk);
diff --git a/include/linux/genhd.h b/include/linux/genhd.h
index 98076b1b5e48..a65d9fc17369 100644
--- a/include/linux/genhd.h
+++ b/include/linux/genhd.h
@@ -185,7 +185,6 @@ struct gendisk {
char *(*devnode)(struct gendisk *gd, umode_t *mode);
unsigned int events; /* supported events */
- unsigned int async_events; /* async events, subset of all */
/* Array of pointers to partitions indexed by partno.
* Protected with matching bdev lock but stat and other