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| author | Amol Grover <frextrite@gmail.com> | 2020-02-19 15:05:05 +0530 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2020-03-16 12:04:31 -0400 |
| commit | 51cae673d036a32fe5cca9ec61765aa09e322c59 (patch) | |
| tree | 4b8bfaa7a8bbd0d2b8cfc2e7c86db735477c380a /net/sunrpc/cache.c | |
| parent | 469aef23aa4e49d5191050410a1422117db03e11 (diff) | |
| download | linux-stable-51cae673d036a32fe5cca9ec61765aa09e322c59.tar.gz linux-stable-51cae673d036a32fe5cca9ec61765aa09e322c59.tar.bz2 linux-stable-51cae673d036a32fe5cca9ec61765aa09e322c59.zip | |
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 <frextrite@gmail.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'net/sunrpc/cache.c')
| -rw-r--r-- | net/sunrpc/cache.c | 3 |
1 files changed, 2 insertions, 1 deletions
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); |