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proc: make the proc_create[_data]() stubs static inlines 

Change the proc_create[_data]() stubs which are used when CONFIG_PROC_FS
is not set from #defines to a static inline stubs.

This should fix clang -Werror builds failing due to errors like this:

  drivers/platform/x86/thinkpad_acpi.c:918:30: error: unused variable
   'dispatch_proc_ops' [-Werror,-Wunused-const-variable]

Fixing this in include/linux/proc_fs.h should ensure that the same issue
is also fixed in any other drivers hitting the same -Werror issue.

[akpm@linux-foundation.org: fix CONFIG_PROC_FS=n]
[akpm@linux-foundation.org: fix arch/sparc/kernel/led.c]
[akpm@linux-foundation.org: fix build]

Link: https://lkml.kernel.org/r/20211116131112.508304-1-hdegoede@redhat.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Hans de Goede 2022-01-19 18:08:00 -08:00 committed by Linus Torvalds
parent 25bc5b0de9
commit ae62fbe299
2 changed files with 13 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
arch/sparc/kernel/led.c
View File

@ -114,18 +114,16 @@ static const struct proc_ops led_proc_ops = {
};
#endif
static struct proc_dir_entry *led;
#define LED_VERSION "0.1"
static int __init led_init(void)
{
timer_setup(&led_blink_timer, led_blink, 0);
led = proc_create("led", 0, NULL, &led_proc_ops);
if (!led)
#ifdef CONFIG_PROC_FS
if (!proc_create("led", 0, NULL, &led_proc_ops))
return -ENOMEM;
#endif
printk(KERN_INFO
"led: version %s, Lars Kotthoff <metalhead@metalhead.ws>\n",
LED_VERSION);

12
include/linux/proc_fs.h
View File

@ -178,8 +178,16 @@ static inline struct proc_dir_entry *proc_mkdir_mode(const char *name,
#define proc_create_seq(name, mode, parent, ops) ({NULL;})
#define proc_create_single(name, mode, parent, show) ({NULL;})
#define proc_create_single_data(name, mode, parent, show, data) ({NULL;})
#define proc_create(name, mode, parent, proc_ops) ({NULL;})
#define proc_create_data(name, mode, parent, proc_ops, data) ({NULL;})
static inline struct proc_dir_entry *
proc_create(const char *name, umode_t mode, struct proc_dir_entry *parent,
const struct proc_ops *proc_ops)
{ return NULL; }
static inline struct proc_dir_entry *
proc_create_data(const char *name, umode_t mode, struct proc_dir_entry *parent,
const struct proc_ops *proc_ops, void *data)
{ return NULL; }
static inline void proc_set_size(struct proc_dir_entry *de, loff_t size) {}
static inline void proc_set_user(struct proc_dir_entry *de, kuid_t uid, kgid_t gid) {}