Received-SPF: pass (google.com: domain of linux-nfs+bounces-1397-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.199.223 as permitted sender) client-ip=147.75.199.223;
Subject: [PATCH RFC 10/13] NFSD: Replace comment with lockdep assertion
From: Chuck Lever <cel@kernel.org>
To: linux-nfs@vger.kernel.org
Date: Thu, 25 Jan 2024 11:29:43 -0500
Message-ID: 
 <170620018365.2833.3114414936937483602.stgit@manet.1015granger.net>
In-Reply-To: 
 <170619984210.2833.7173004255003914651.stgit@manet.1015granger.net>
References: 
 <170619984210.2833.7173004255003914651.stgit@manet.1015granger.net>
User-Agent: StGit/1.5
Precedence: bulk
MIME-Version: 1.0
Content-Type: text/plain; charset="utf-8"
Content-Transfer-Encoding: 7bit

From: Chuck Lever <chuck.lever@oracle.com>

Convert a code comment into a real assertion.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
---
 fs/nfsd/nfs4callback.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 1e0f5a0bd804..dc308569bc31 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -1307,12 +1307,13 @@ void nfsd4_shutdown_callback(struct nfs4_client *clp)
 	nfsd41_cb_inflight_wait_complete(clp);
 }
 
-/* requires cl_lock: */
 static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp)
 {
 	struct nfsd4_session *s;
 	struct nfsd4_conn *c;
 
+	lockdep_assert_held(&clp->cl_lock);
+
 	list_for_each_entry(s, &clp->cl_sessions, se_perclnt) {
 		list_for_each_entry(c, &s->se_conns, cn_persession) {
 			if (c->cn_flags & NFS4_CDFC4_BACK)