From 51cae673d036a32fe5cca9ec61765aa09e322c59 Mon Sep 17 00:00:00 2001 From: Amol Grover Date: Wed, 19 Feb 2020 15:05:05 +0530 Subject: sunrpc: Pass lockdep expression to RCU lists detail->hash_table[] is traversed using hlist_for_each_entry_rcu outside an RCU read-side critical section but under the protection of detail->hash_lock. Hence, add corresponding lockdep expression to silence false-positive warnings, and harden RCU lists. Signed-off-by: Amol Grover Signed-off-by: J. Bruce Fields Signed-off-by: Chuck Lever --- net/sunrpc/cache.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/sunrpc/cache.c') diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c index bd843a81afa0..8a8e3528293c 100644 --- a/net/sunrpc/cache.c +++ b/net/sunrpc/cache.c @@ -113,7 +113,8 @@ static struct cache_head *sunrpc_cache_add_entry(struct cache_detail *detail, spin_lock(&detail->hash_lock); /* check if entry appeared while we slept */ - hlist_for_each_entry_rcu(tmp, head, cache_list) { + hlist_for_each_entry_rcu(tmp, head, cache_list, + lockdep_is_held(&detail->hash_lock)) { if (detail->match(tmp, key)) { if (cache_is_expired(detail, tmp)) { sunrpc_begin_cache_remove_entry(tmp, detail); -- cgit v1.2.3