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

Message ID 152452255348.1456.1629211529227597992.stgit@noble
State Accepted, archived
Delegated to: David Miller
Headers show
Series A few rhashtables cleanups | expand

Commit Message

NeilBrown April 23, 2018, 10:29 p.m. UTC 
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(+)
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Patch

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;
 	}