1 files changed, 5 insertions, 16 deletions

diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index cc2bdb83f9ad..135c2f1fdbfc 100644
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -154,11 +154,6 @@ struct pstore {
         struct workqueue_struct *metadata_wq;
 };
 
-static unsigned sectors_to_pages(unsigned sectors)
-{
-        return DIV_ROUND_UP(sectors, PAGE_SIZE >> 9);
-}
-
 static int alloc_area(struct pstore *ps)
 {
         int r = -ENOMEM;
@@ -254,9 +249,9 @@ static int chunk_io(struct pstore *ps, void *area, chunk_t chunk, int rw,
          * Issue the synchronous I/O from a different thread
          * to avoid generic_make_request recursion.
          */
-        INIT_WORK_ON_STACK(&req.work, do_metadata);
+        INIT_WORK_ONSTACK(&req.work, do_metadata);
         queue_work(ps->metadata_wq, &req.work);
-        flush_workqueue(ps->metadata_wq);
+        flush_work(&req.work);
 
         return req.result;
 }
@@ -318,8 +313,7 @@ static int read_header(struct pstore *ps, int *new_snapshot)
                 chunk_size_supplied = 0;
         }
 
-        ps->io_client = dm_io_client_create(sectors_to_pages(ps->store->
-                                                             chunk_size));
+        ps->io_client = dm_io_client_create();
         if (IS_ERR(ps->io_client))
                 return PTR_ERR(ps->io_client);
 
@@ -368,11 +362,6 @@ static int read_header(struct pstore *ps, int *new_snapshot)
                 return r;
         }
 
-        r = dm_io_client_resize(sectors_to_pages(ps->store->chunk_size),
-                                ps->io_client);
-        if (r)
-                return r;
-
         r = alloc_area(ps);
         return r;
 
@@ -687,7 +676,7 @@ static void persistent_commit_exception(struct dm_exception_store *store,
         /*
          * Commit exceptions to disk.
          */
-        if (ps->valid && area_io(ps, WRITE_BARRIER))
+        if (ps->valid && area_io(ps, WRITE_FLUSH_FUA))
                 ps->valid = 0;
 
         /*
@@ -818,7 +807,7 @@ static int persistent_ctr(struct dm_exception_store *store,
         atomic_set(&ps->pending_count, 0);
         ps->callbacks = NULL;
 
-        ps->metadata_wq = create_singlethread_workqueue("ksnaphd");
+        ps->metadata_wq = alloc_workqueue("ksnaphd", WQ_MEM_RECLAIM, 0);
         if (!ps->metadata_wq) {
                 kfree(ps);
                 DMERR("couldn't start header metadata update thread");