linux-kernel - [PATCH 5.4 01/29] nfsd: cleanup nfsd_file_lru

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Date:   Fri, 25 Mar 2022 16:04:41 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        "J. Bruce Fields" <bfields@...hat.com>,
        Khazhy Kumykov <khazhy@...gle.com>
Subject: [PATCH 5.4 01/29] nfsd: cleanup nfsd_file_lru_dispose()

From: Trond Myklebust <trondmy@...il.com>

commit 36ebbdb96b694dd9c6b25ad98f2bbd263d022b63 upstream.

Signed-off-by: Trond Myklebust <trond.myklebust@...merspace.com>
Signed-off-by: J. Bruce Fields <bfields@...hat.com>
Cc: Khazhy Kumykov <khazhy@...gle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 fs/nfsd/filecache.c |   13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

--- a/fs/nfsd/filecache.c
+++ b/fs/nfsd/filecache.c
@@ -260,8 +260,6 @@ nfsd_file_do_unhash(struct nfsd_file *nf
 		nfsd_reset_boot_verifier(net_generic(nf->nf_net, nfsd_net_id));
 	--nfsd_file_hashtbl[nf->nf_hashval].nfb_count;
 	hlist_del_rcu(&nf->nf_node);
-	if (!list_empty(&nf->nf_lru))
-		list_lru_del(&nfsd_file_lru, &nf->nf_lru);
 	atomic_long_dec(&nfsd_filecache_count);
 }
 
@@ -270,6 +268,8 @@ nfsd_file_unhash(struct nfsd_file *nf)
 {
 	if (test_and_clear_bit(NFSD_FILE_HASHED, &nf->nf_flags)) {
 		nfsd_file_do_unhash(nf);
+		if (!list_empty(&nf->nf_lru))
+			list_lru_del(&nfsd_file_lru, &nf->nf_lru);
 		return true;
 	}
 	return false;
@@ -406,15 +406,14 @@ out_skip:
 static void
 nfsd_file_lru_dispose(struct list_head *head)
 {
-	while(!list_empty(head)) {
-		struct nfsd_file *nf = list_first_entry(head,
-				struct nfsd_file, nf_lru);
-		list_del_init(&nf->nf_lru);
+	struct nfsd_file *nf;
+
+	list_for_each_entry(nf, head, nf_lru) {
 		spin_lock(&nfsd_file_hashtbl[nf->nf_hashval].nfb_lock);
 		nfsd_file_do_unhash(nf);
 		spin_unlock(&nfsd_file_hashtbl[nf->nf_hashval].nfb_lock);
-		nfsd_file_put_noref(nf);
 	}
+	nfsd_file_dispose_list(head);
 }
 
 static unsigned long