rhashtable: Revert nested table changes.

This reverts commits:

6a25478077d987edc5e2f880590a2bc5fcab4441
9dbbfb0ab6680c6a85609041011484e6658e7d3c
40137906c5f55c252194ef5834130383e639536f

It's too risky to put in this late in the release
cycle.  We'll put these changes into the next merge
window instead.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 11 insertions, 17 deletions

diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index 70e94170af85..94f50cac91c6 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1420,32 +1420,26 @@ static struct shrinker glock_shrinker = {
  * @sdp: the filesystem
  * @bucket: the bucket
  *
- * Note that the function can be called multiple times on the same
- * object.  So the user must ensure that the function can cope with
- * that.
  */
 
 static void glock_hash_walk(glock_examiner examiner, const struct gfs2_sbd *sdp)
 {
 	struct gfs2_glock *gl;
-	struct rhashtable_iter iter;
-
-	rhashtable_walk_enter(&gl_hash_table, &iter);
-
-	do {
-		gl = ERR_PTR(rhashtable_walk_start(&iter));
-		if (gl)
-			continue;
+	struct rhash_head *pos;
+	const struct bucket_table *tbl;
+	int i;
 
-		while ((gl = rhashtable_walk_next(&iter)) && !IS_ERR(gl))
+	rcu_read_lock();
+	tbl = rht_dereference_rcu(gl_hash_table.tbl, &gl_hash_table);
+	for (i = 0; i < tbl->size; i++) {
+		rht_for_each_entry_rcu(gl, pos, tbl, i, gl_node) {
 			if ((gl->gl_name.ln_sbd == sdp) &&
 			    lockref_get_not_dead(&gl->gl_lockref))
 				examiner(gl);
-
-		rhashtable_walk_stop(&iter);
-	} while (cond_resched(), gl == ERR_PTR(-EAGAIN));
-
-	rhashtable_walk_exit(&iter);
+		}
+	}
+	rcu_read_unlock();
+	cond_resched();
 }
 
 /**