Fix Off-by-one in /sys/module/*/refcnt

sysfs internals were changed to not pin module in question.

Signed-off-by: Alexey Dobriyan <[e-mail]>
Acked-by: Kay Sievers <[e-mail]>
Acked-by: Tejun Heo <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

kernel/module.c

···
 static ssize_t show_refcnt(struct module_attribute *mattr,
 			   struct module *mod, char *buffer)
 {
-	/* sysfs holds a reference */
-	return sprintf(buffer, "%u\n", module_refcount(mod)-1);
+	return sprintf(buffer, "%u\n", module_refcount(mod));
 }
 
 static struct module_attribute refcnt = {