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drbd: switch to proc_create_single

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And stop messing with try_module_get on THIS_MODULE, which doesn't make
any sense here.

Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig 2018-04-11 16:46:11 +02:00
parent 4e292a9667
commit 004fd11db1
3 changed files with 4 additions and 35 deletions
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2
drivers/block/drbd/drbd_int.h
View File

@ -1643,7 +1643,7 @@ void drbd_bump_write_ordering(struct drbd_resource *resource, struct drbd_backin
/* drbd_proc.c */
extern struct proc_dir_entry *drbd_proc;
extern const struct file_operations drbd_proc_fops;
int drbd_seq_show(struct seq_file *seq, void *v);
/* drbd_actlog.c */
extern bool drbd_al_begin_io_prepare(struct drbd_device *device, struct drbd_interval *i);

3
drivers/block/drbd/drbd_main.c
View File

@ -3010,7 +3010,8 @@ static int __init drbd_init(void)
goto fail;
err = -ENOMEM;
drbd_proc = proc_create_data("drbd", S_IFREG | S_IRUGO , NULL, &drbd_proc_fops, NULL);
drbd_proc = proc_create_single("drbd", S_IFREG | S_IRUGO , NULL,
drbd_seq_show);
if (!drbd_proc) {
pr_err("unable to register proc file\n");
goto fail;

34
drivers/block/drbd/drbd_proc.c
View File

@ -33,18 +33,7 @@
#include <linux/drbd.h>
#include "drbd_int.h"
static int drbd_proc_open(struct inode *inode, struct file *file);
static int drbd_proc_release(struct inode *inode, struct file *file);
struct proc_dir_entry *drbd_proc;
const struct file_operations drbd_proc_fops = {
.owner = THIS_MODULE,
.open = drbd_proc_open,
.read = seq_read,
.llseek = seq_lseek,
.release = drbd_proc_release,
};
static void seq_printf_with_thousands_grouping(struct seq_file *seq, long v)
{
@ -235,7 +224,7 @@ static void drbd_syncer_progress(struct drbd_device *device, struct seq_file *se
}
}
static int drbd_seq_show(struct seq_file *seq, void *v)
int drbd_seq_show(struct seq_file *seq, void *v)
{
int i, prev_i = -1;
const char *sn;
@ -345,24 +334,3 @@ static int drbd_seq_show(struct seq_file *seq, void *v)
return 0;
}
static int drbd_proc_open(struct inode *inode, struct file *file)
{
int err;
if (try_module_get(THIS_MODULE)) {
err = single_open(file, drbd_seq_show, NULL);
if (err)
module_put(THIS_MODULE);
return err;
}
return -ENODEV;
}
static int drbd_proc_release(struct inode *inode, struct file *file)
{
module_put(THIS_MODULE);
return single_release(inode, file);
}
/* PROC FS stuff end */