tty: Split tty_port into its own file

Not much in it yet but this will grow a lot

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 0 insertions, 36 deletions

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 3a726936aa5b..732316899ca4 100644
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1139,42 +1139,6 @@ ssize_t redirected_tty_write(struct file *file, const char __user *buf,
         return tty_write(file, buf, count, ppos);
 }
 
-void tty_port_init(struct tty_port *port)
-{
-        memset(port, 0, sizeof(*port));
-        init_waitqueue_head(&port->open_wait);
-        init_waitqueue_head(&port->close_wait);
-        mutex_init(&port->mutex);
-        port->close_delay = (50 * HZ) / 100;
-        port->closing_wait = (3000 * HZ) / 100;
-}
-EXPORT_SYMBOL(tty_port_init);
-
-int tty_port_alloc_xmit_buf(struct tty_port *port)
-{
-        /* We may sleep in get_zeroed_page() */
-        mutex_lock(&port->mutex);
-        if (port->xmit_buf == NULL)
-                port->xmit_buf = (unsigned char *)get_zeroed_page(GFP_KERNEL);
-        mutex_unlock(&port->mutex);
-        if (port->xmit_buf == NULL)
-                return -ENOMEM;
-        return 0;
-}
-EXPORT_SYMBOL(tty_port_alloc_xmit_buf);
-
-void tty_port_free_xmit_buf(struct tty_port *port)
-{
-        mutex_lock(&port->mutex);
-        if (port->xmit_buf != NULL) {
-                free_page((unsigned long)port->xmit_buf);
-                port->xmit_buf = NULL;
-        }
-        mutex_unlock(&port->mutex);
-}
-EXPORT_SYMBOL(tty_port_free_xmit_buf);
-
-
 static char ptychar[] = "pqrstuvwxyzabcde";
 
 /**