LU-10467 llite: use wait_event in cl_object_put_last()

cl_object_put_last() contains an open-coded version
of wait_event().
Replace it with the library macro.

Change-Id: I878f76c9af24e827f91fe50fbeb637dda1489b8a
Signed-off-by: NeilBrown <neilb@suse.com>
Reviewed-on: https://review.whamcloud.com/36345
Tested-by: jenkins <devops@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre/llite/lcommon_cl.c b/lustre/llite/lcommon_cl.c
index bc4c30a..c8e4402 100644 (file)
--- a/lustre/llite/lcommon_cl.c
+++ b/lustre/llite/lcommon_cl.c
@@ -211,7 +211,6 @@ out:
 static void cl_object_put_last(struct lu_env *env, struct cl_object *obj)
 {
        struct lu_object_header *header = obj->co_lu.lo_header;
-       wait_queue_entry_t waiter;
 
        if (unlikely(atomic_read(&header->loh_ref) != 1)) {
                struct lu_site *site = obj->co_lu.lo_dev->ld_site;
@@ -219,18 +218,7 @@ static void cl_object_put_last(struct lu_env *env, struct cl_object *obj)
 
                wq = lu_site_wq_from_fid(site, &header->loh_fid);
 
-               init_waitqueue_entry(&waiter, current);
-               add_wait_queue(wq, &waiter);
-
-               while (1) {
-                       set_current_state(TASK_UNINTERRUPTIBLE);
-                       if (atomic_read(&header->loh_ref) == 1)
-                               break;
-                       schedule();
-               }
-
-               set_current_state(TASK_RUNNING);
-               remove_wait_queue(wq, &waiter);
+               wait_event(*wq, atomic_read(&header->loh_ref) == 1);
        }
 
        cl_object_put(env, obj);