[PATCH 5.10.y 1/2] nfsd: define exports_proc_ops with CONFIG_PROC_FS

[Sasha Levin <sashal@kernel.org>]

From: Tom Rix <trix@redhat.com>

[ Upstream commit 340086da9a87820b40601141a0e9e87c954ac006 ]

gcc with W=1 and ! CONFIG_PROC_FS
fs/nfsd/nfsctl.c:161:30: error: ‘exports_proc_ops’
  defined but not used [-Werror=unused-const-variable=]
  161 | static const struct proc_ops exports_proc_ops = {
      |                              ^~~~~~~~~~~~~~~~

The only use of exports_proc_ops is when CONFIG_PROC_FS
is defined, so its definition should be likewise conditional.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Stable-dep-of: e7fcf179b82d ("NFSD: Hold net reference for the lifetime of /proc/fs/nfs/exports fd")
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/nfsd/nfsctl.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index 07e5b1b23c91f..ad7a3909ae6df 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -155,18 +155,6 @@ static int exports_net_open(struct net *net, struct file *file)
 	return 0;
 }
 
-static int exports_proc_open(struct inode *inode, struct file *file)
-{
-	return exports_net_open(current->nsproxy->net_ns, file);
-}
-
-static const struct proc_ops exports_proc_ops = {
-	.proc_open	= exports_proc_open,
-	.proc_read	= seq_read,
-	.proc_lseek	= seq_lseek,
-	.proc_release	= seq_release,
-};
-
 static int exports_nfsd_open(struct inode *inode, struct file *file)
 {
 	return exports_net_open(inode->i_sb->s_fs_info, file);
@@ -1423,6 +1411,19 @@ static struct file_system_type nfsd_fs_type = {
 MODULE_ALIAS_FS("nfsd");
 
 #ifdef CONFIG_PROC_FS
+
+static int exports_proc_open(struct inode *inode, struct file *file)
+{
+	return exports_net_open(current->nsproxy->net_ns, file);
+}
+
+static const struct proc_ops exports_proc_ops = {
+	.proc_open	= exports_proc_open,
+	.proc_read	= seq_read,
+	.proc_lseek	= seq_lseek,
+	.proc_release	= seq_release,
+};
+
 static int create_proc_exports_entry(void)
 {
 	struct proc_dir_entry *entry;
-- 
2.51.0