sysfs: Make dir and name args to sysfs_notify() const

Because they can be, and because code like this produces a warning if
they're not:

struct device_attribute dev_attr;

sysfs_notify(&kobj, NULL, dev_attr.attr.name);
Signed-off-by: Trent Piepho <tpiepho@freescale.com>
CC: Neil Brown <neilb@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

fs/sysfs/file.c

@@ -469,7 +469,7 @@ void sysfs_notify_dirent(struct sysfs_dirent *sd)
 }
 EXPORT_SYMBOL_GPL(sysfs_notify_dirent);
 
-void sysfs_notify(struct kobject *k, char *dir, char *attr)
+void sysfs_notify(struct kobject *k, const char *dir, const char *attr)
 {
 	struct sysfs_dirent *sd = k->sd;
 

include/linux/sysfs.h

@@ -119,7 +119,7 @@ int sysfs_add_file_to_group(struct kobject *kobj,
 void sysfs_remove_file_from_group(struct kobject *kobj,
 			const struct attribute *attr, const char *group);
 
-void sysfs_notify(struct kobject *kobj, char *dir, char *attr);
+void sysfs_notify(struct kobject *kobj, const char *dir, const char *attr);
 void sysfs_notify_dirent(struct sysfs_dirent *sd);
 struct sysfs_dirent *sysfs_get_dirent(struct sysfs_dirent *parent_sd,
 				      const unsigned char *name);
@@ -229,7 +229,8 @@ static inline void sysfs_remove_file_from_group(struct kobject *kobj,
 {
 }
 
-static inline void sysfs_notify(struct kobject *kobj, char *dir, char *attr)
+static inline void sysfs_notify(struct kobject *kobj, const char *dir,
+				const char *attr)
 {
 }
 static inline void sysfs_notify_dirent(struct sysfs_dirent *sd)