proc tty: remove struct tty_operations::read_proc

struct tty_operations::proc_fops took it's place and there is one less
create_proc_read_entry() user now!

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/isdn/capi/capi.c

@@ -1331,12 +1331,6 @@ static void capinc_tty_send_xchar(struct tty_struct *tty, char ch)
 #endif
 }
 
-static int capinc_tty_read_proc(char *page, char **start, off_t off,
-				int count, int *eof, void *data)
-{
-	return 0;
-}
-
 static struct tty_driver *capinc_tty_driver;
 
 static const struct tty_operations capinc_ops = {
@@ -1358,7 +1352,6 @@ static const struct tty_operations capinc_ops = {
 	.flush_buffer = capinc_tty_flush_buffer,
 	.set_ldisc = capinc_tty_set_ldisc,
 	.send_xchar = capinc_tty_send_xchar,
-	.read_proc = capinc_tty_read_proc,
 };
 
 static int capinc_tty_init(void)

fs/proc/proc_tty.c

@@ -144,22 +144,12 @@ void proc_tty_register_driver(struct tty_driver *driver)
 {
 	struct proc_dir_entry *ent;
 
-	if (!driver->driver_name || driver->proc_entry)
+	if (!driver->driver_name || driver->proc_entry ||
+	    !driver->ops->proc_fops)
 		return;
 
-	if (driver->ops->proc_fops) {
-		ent = proc_create_data(driver->driver_name, 0, proc_tty_driver,
-				       driver->ops->proc_fops, driver);
-		if (!ent)
-			return;
-	} else if (driver->ops->read_proc) {
-		ent = create_proc_entry(driver->driver_name, 0, proc_tty_driver);
-		if (!ent)
-			return;
-		ent->read_proc = driver->ops->read_proc;
-		ent->data = driver;
-	} else
-		return;
+	ent = proc_create_data(driver->driver_name, 0, proc_tty_driver,
+			       driver->ops->proc_fops, driver);
 	driver->proc_entry = ent;
 }
 

include/linux/tty_driver.h

@@ -252,8 +252,6 @@ struct tty_operations {
 	void (*set_ldisc)(struct tty_struct *tty);
 	void (*wait_until_sent)(struct tty_struct *tty, int timeout);
 	void (*send_xchar)(struct tty_struct *tty, char ch);
-	int (*read_proc)(char *page, char **start, off_t off,
-			  int count, int *eof, void *data);
 	int (*tiocmget)(struct tty_struct *tty, struct file *file);
 	int (*tiocmset)(struct tty_struct *tty, struct file *file,
 			unsigned int set, unsigned int clear);

net/bluetooth/rfcomm/tty.c

@@ -1093,11 +1093,6 @@ static void rfcomm_tty_hangup(struct tty_struct *tty)
 	}
 }
 
-static int rfcomm_tty_read_proc(char *buf, char **start, off_t offset, int len, int *eof, void *unused)
-{
-	return 0;
-}
-
 static int rfcomm_tty_tiocmget(struct tty_struct *tty, struct file *filp)
 {
 	struct rfcomm_dev *dev = (struct rfcomm_dev *) tty->driver_data;
@@ -1156,7 +1151,6 @@ static const struct tty_operations rfcomm_ops = {
 	.send_xchar		= rfcomm_tty_send_xchar,
 	.hangup			= rfcomm_tty_hangup,
 	.wait_until_sent	= rfcomm_tty_wait_until_sent,
-	.read_proc		= rfcomm_tty_read_proc,
 	.tiocmget		= rfcomm_tty_tiocmget,
 	.tiocmset		= rfcomm_tty_tiocmset,
 };