From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-Id: <20120620173022.272069605@linuxfoundation.org> Date: Wed, 20 Jun 2012 10:30:35 -0700 From: Greg KH To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: torvalds@linux-foundation.org, akpm@linux-foundation.org, alan@lxorguk.ukuu.org.uk, Benny Halevy , "J. Bruce Fields" Subject: [ 15/61] nfsd4: BUG_ON(!is_spin_locked()) no good on UP kernels In-Reply-To: <20120620173033.GA5634@kroah.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: 3.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: "J. Bruce Fields" commit bc2df47a408f2d64cf81bcfd0f6e3e14c84cb0ab upstream. 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: Benny Halevy Signed-off-by: J. Bruce Fields Signed-off-by: Greg Kroah-Hartman --- fs/nfsd/nfs4state.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -862,7 +862,7 @@ static void free_session(struct kref *kr 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); @@ -1041,7 +1041,7 @@ static struct nfs4_client *alloc_client( 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,