From f431d9666fd6e69fbaf305cebc7278d1428950c2 Mon Sep 17 00:00:00 2001 From: Kiyoshi Ueda Date: Tue, 21 Oct 2008 17:45:07 +0100 Subject: [PATCH] dm: remove unused flush_all This patch removes the DM_WQ_FLUSH_ALL state that is unnecessary. The dm_queue_flush(md, DM_WQ_FLUSH_ALL, NULL) in dm_suspend() is never invoked because: - 'goto flush_and_out' is the same as 'goto out' because the 'goto flush_and_out' is called only when '!noflush' - If r is non-zero, then the code above will invoke 'goto out' and skip this code. No functional change. Signed-off-by: Kiyoshi Ueda Signed-off-by: Jun'ichi Nomura Signed-off-by: Milan Broz Signed-off-by: Alasdair G Kergon --- drivers/md/dm.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 829d9fc66453..6938bfeb5e2c 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -76,7 +76,6 @@ union map_info *dm_get_mapinfo(struct bio *bio) */ struct dm_wq_req { enum { - DM_WQ_FLUSH_ALL, DM_WQ_FLUSH_DEFERRED, } type; struct work_struct work; @@ -1395,9 +1394,6 @@ static void dm_wq_work(struct work_struct *work) down_write(&md->io_lock); switch (req->type) { - case DM_WQ_FLUSH_ALL: - __merge_pushback_list(md); - /* pass through */ case DM_WQ_FLUSH_DEFERRED: __flush_deferred_io(md); break; @@ -1527,7 +1523,7 @@ int dm_suspend(struct mapped_device *md, unsigned suspend_flags) if (!md->suspended_bdev) { DMWARN("bdget failed in dm_suspend"); r = -ENOMEM; - goto flush_and_out; + goto out; } /* @@ -1578,14 +1574,6 @@ int dm_suspend(struct mapped_device *md, unsigned suspend_flags) set_bit(DMF_SUSPENDED, &md->flags); -flush_and_out: - if (r && noflush) - /* - * Because there may be already I/Os in the pushback list, - * flush them before return. - */ - dm_queue_flush(md, DM_WQ_FLUSH_ALL, NULL); - out: if (r && md->suspended_bdev) { bdput(md->suspended_bdev); -- 2.20.1