nfsd4: BUG_ON(!is_spin_locked()) no good on UP kernels
Most frequent symptom was a BUG triggering in expire_client, with the
server locking up shortly thereafter.
Introduced by 508dc6e110c6dbdc0bbe84298ccfe22de7538486 "nfsd41:
free_session/free_client must be called under the client_lock".
Cc: stable@kernel.org
Cc: Benny Halevy <bhalevy@tonian.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 8fdc9ec..94effd5 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -900,7 +900,7 @@
struct nfsd4_session *ses;
int mem;
- BUG_ON(!spin_is_locked(&client_lock));
+ lockdep_assert_held(&client_lock);
ses = container_of(kref, struct nfsd4_session, se_ref);
nfsd4_del_conns(ses);
spin_lock(&nfsd_drc_lock);
@@ -1080,7 +1080,7 @@
static inline void
free_client(struct nfs4_client *clp)
{
- BUG_ON(!spin_is_locked(&client_lock));
+ lockdep_assert_held(&client_lock);
while (!list_empty(&clp->cl_sessions)) {
struct nfsd4_session *ses;
ses = list_entry(clp->cl_sessions.next, struct nfsd4_session,