No need to take the lock unless the count goes to 0.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 633b34fd6c92..8aa57265fb08 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -193,8 +193,10 @@ static void put_client_renew(struct nfs4_client *clp)
{
struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
- spin_lock(&nn->client_lock);
- put_client_renew_locked(clp);
+ if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
+ return;
+ if (!is_client_expired(clp))
+ renew_client_locked(clp);
spin_unlock(&nn->client_lock);
}
--
1.9.3
--
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