2023-05-02 17:18:03

by Tom Rix

Subject: [PATCH] nfsd: define exports_proc_ops with CONFIG_PROC_FS

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 <[email protected]>
---
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 7b8f17ee5224..c159817d1282 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -153,18 +153,6 @@ 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);
@@ -1458,6 +1446,19 @@ 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;
--
2.27.0

2023-05-02 18:17:52

by Jeff Layton

Subject: Re: [PATCH] nfsd: define exports_proc_ops with CONFIG_PROC_FS

On Tue, 2023-05-02 at 13:11 -0400, Tom Rix wrote:
> 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 <[email protected]>
> ---
> 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 7b8f17ee5224..c159817d1282 100644
> --- a/fs/nfsd/nfsctl.c
> +++ b/fs/nfsd/nfsctl.c
> @@ -153,18 +153,6 @@ 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);
> @@ -1458,6 +1446,19 @@ 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;

Reviewed-by: Jeff Layton <[email protected]>