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Commit 9e48565d authored by Alan Cox's avatar Alan Cox Committed by Linus Torvalds
Browse files

tty: Split tty_port into its own file 



Not much in it yet but this will grow a lot

Signed-off-by: default avatarAlan Cox <alan@redhat.com>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent e0495736

drivers/char/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -7,7 +7,7 @@ 
#

FONTMAPFILE = cp437.uni



obj-y	 += mem.o random.o tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o tty_buffer.o

obj-y	 += mem.o random.o tty_io.o n_tty.o tty_ioctl.o tty_ldisc.o tty_buffer.o tty_port.o



obj-$(CONFIG_LEGACY_PTYS)	+= pty.o

obj-$(CONFIG_UNIX98_PTYS)	+= pty.o

drivers/char/tty_io.c

+0 −36
Original line number Diff line number Diff line
@@ -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";



/**

drivers/char/tty_port.c

0 → 100644
+55 −0
Original line number Diff line number Diff line 
/*

 * Tty port functions

 */



#include <linux/types.h>

#include <linux/errno.h>

#include <linux/tty.h>

#include <linux/tty_driver.h>

#include <linux/tty_flip.h>

#include <linux/timer.h>

#include <linux/string.h>

#include <linux/slab.h>

#include <linux/sched.h>

#include <linux/init.h>

#include <linux/wait.h>

#include <linux/bitops.h>

#include <linux/delay.h>

#include <linux/module.h>



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);