dm snapshot: persistent annotate work_queue as on stack

chunk_io() declares its 'struct mdata_req' on the stack and then
initializes its 'struct work_struct' member.  Annotate the
initialization of this workqueue with INIT_WORK_ON_STACK to suppress a
debugobjects warning seen when CONFIG_DEBUG_OBJECTS_WORK is enabled.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c
index 7d08879689acc27b6e91f038e53fb1be4deb1b89..c097d8a4823d65f7e3408c9f116c235b19cec735 100644 (file)
--- a/drivers/md/dm-snap-persistent.c
+++ b/drivers/md/dm-snap-persistent.c
@@ -254,7 +254,7 @@ 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(&req.work, do_metadata);
+       INIT_WORK_ON_STACK(&req.work, do_metadata);
        queue_work(ps->metadata_wq, &req.work);
        flush_workqueue(ps->metadata_wq);