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authorNeilBrown <neilb@suse.de>2011-04-18 18:25:42 +1000
committerNeilBrown <neilb@suse.de>2011-04-18 18:25:42 +1000
commit482c083492ddaa32ef5864bae3d143dc8bcdf7d1 (patch)
tree75017fd1a51fe945c65b3600442ddaa20b636b1a /drivers/md/md.c
parentaf1db72d8b340f97ad12b60175afdef43e6f0e60 (diff)
md - remove old plugging code.
md has some plugging infrastructure for RAID5 to use because the normal plugging infrastructure required a 'request_queue', and when called from dm, RAID5 doesn't have one of those available. This relied on the ->unplug_fn callback which doesn't exist any more. So remove all of that code, both in md and raid5. Subsequent patches with restore the plugging functionality. Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r--drivers/md/md.c51
1 files changed, 0 insertions, 51 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c
index b12b3776c0c0..fb11170c717e 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -445,50 +445,6 @@ void md_flush_request(mddev_t *mddev, struct bio *bio)
}
EXPORT_SYMBOL(md_flush_request);
-/* Support for plugging.
- * This mirrors the plugging support in request_queue, but does not
- * require having a whole queue
- */
-static void plugger_work(struct work_struct *work)
-{
- struct plug_handle *plug =
- container_of(work, struct plug_handle, unplug_work);
- plug->unplug_fn(plug);
-}
-static void plugger_timeout(unsigned long data)
-{
- struct plug_handle *plug = (void *)data;
- kblockd_schedule_work(NULL, &plug->unplug_work);
-}
-void plugger_init(struct plug_handle *plug,
- void (*unplug_fn)(struct plug_handle *))
-{
- plug->unplug_flag = 0;
- plug->unplug_fn = unplug_fn;
- init_timer(&plug->unplug_timer);
- plug->unplug_timer.function = plugger_timeout;
- plug->unplug_timer.data = (unsigned long)plug;
- INIT_WORK(&plug->unplug_work, plugger_work);
-}
-EXPORT_SYMBOL_GPL(plugger_init);
-
-void plugger_set_plug(struct plug_handle *plug)
-{
- if (!test_and_set_bit(PLUGGED_FLAG, &plug->unplug_flag))
- mod_timer(&plug->unplug_timer, jiffies + msecs_to_jiffies(3)+1);
-}
-EXPORT_SYMBOL_GPL(plugger_set_plug);
-
-int plugger_remove_plug(struct plug_handle *plug)
-{
- if (test_and_clear_bit(PLUGGED_FLAG, &plug->unplug_flag)) {
- del_timer(&plug->unplug_timer);
- return 1;
- } else
- return 0;
-}
-EXPORT_SYMBOL_GPL(plugger_remove_plug);
-
static inline mddev_t *mddev_get(mddev_t *mddev)
{
@@ -4723,7 +4679,6 @@ static void md_clean(mddev_t *mddev)
mddev->bitmap_info.chunksize = 0;
mddev->bitmap_info.daemon_sleep = 0;
mddev->bitmap_info.max_write_behind = 0;
- mddev->plug = NULL;
}
static void __md_stop_writes(mddev_t *mddev)
@@ -6688,12 +6643,6 @@ int md_allow_write(mddev_t *mddev)
}
EXPORT_SYMBOL_GPL(md_allow_write);
-void md_unplug(mddev_t *mddev)
-{
- if (mddev->plug)
- mddev->plug->unplug_fn(mddev->plug);
-}
-
#define SYNC_MARKS 10
#define SYNC_MARK_STEP (3*HZ)
void md_do_sync(mddev_t *mddev)