[PATCH 3/4] rhashtable: reset iter when rhashtable_walk_start sees new table

NeilBrown
2018-04-23T22:29:13Z

The documentation claims that when rhashtable_walk_start_check()
detects a resize event, it will rewind back to the beginning
of the table. This is not true. We need to set ->slot and
->skip to be zero for it to be true.

Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: NeilBrown <neilb@suse.com>
---
lib/rhashtable.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/lib/rhashtable.c b/lib/rhashtable.c
index 6d490f51174e..81edf1ab38ab 100644
--- a/lib/rhashtable.c
+++ b/lib/rhashtable.c
@@ -737,6 +737,8 @@ int rhashtable_walk_start_check(struct rhashtable_iter *iter)

if (!iter->walker.tbl && !iter->end_of_table) {
iter->walker.tbl = rht_dereference_rcu(ht->tbl, ht);
+ iter->slot = 0;
+ iter->skip = 0;
return -EAGAIN;
}