PTY: add kernel parameter to overwrite legacy pty count

[linux-2.6-omap-h63xx.git] / drivers / char / pty.c

diff --git a/drivers/char/pty.c b/drivers/char/pty.c
index 34dd4c38110e060f6bdfd866d0aa2bdb41994d08..73de77105fea9c9a58c8ed704fab7626b2bfb2d1 100644 (file)
--- a/drivers/char/pty.c
+++ b/drivers/char/pty.c
@@ -14,7 +14,6 @@
 #include <linux/module.h>      /* For EXPORT_SYMBOL */
 
 #include <linux/errno.h>
-#include <linux/sched.h>
 #include <linux/interrupt.h>
 #include <linux/tty.h>
 #include <linux/tty_flip.h>
@@ -218,13 +217,13 @@ out:
        return retval;
 }
 
-static void pty_set_termios(struct tty_struct *tty, struct termios *old_termios)
+static void pty_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
 {
         tty->termios->c_cflag &= ~(CSIZE | PARENB);
         tty->termios->c_cflag |= (CS8 | CREAD);
 }
 
-static struct tty_operations pty_ops = {
+static const struct tty_operations pty_ops = {
        .open = pty_open,
        .close = pty_close,
        .write = pty_write,
@@ -249,14 +248,19 @@ static int pty_bsd_ioctl(struct tty_struct *tty, struct file *file,
        return -ENOIOCTLCMD;
 }
 
+static int legacy_count = CONFIG_LEGACY_PTY_COUNT;
+module_param(legacy_count, int, 0);
+
 static void __init legacy_pty_init(void)
 {
+       if (legacy_count <= 0)
+               return;
 
-       pty_driver = alloc_tty_driver(NR_PTYS);
+       pty_driver = alloc_tty_driver(legacy_count);
        if (!pty_driver)
                panic("Couldn't allocate pty driver");
 
-       pty_slave_driver = alloc_tty_driver(NR_PTYS);
+       pty_slave_driver = alloc_tty_driver(legacy_count);
        if (!pty_slave_driver)
                panic("Couldn't allocate pty slave driver");
 
@@ -272,6 +276,8 @@ static void __init legacy_pty_init(void)
        pty_driver->init_termios.c_oflag = 0;
        pty_driver->init_termios.c_cflag = B38400 | CS8 | CREAD;
        pty_driver->init_termios.c_lflag = 0;
+       pty_driver->init_termios.c_ispeed = 38400;
+       pty_driver->init_termios.c_ospeed = 38400;
        pty_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW;
        pty_driver->other = pty_slave_driver;
        tty_set_operations(pty_driver, &pty_ops);
@@ -286,6 +292,8 @@ static void __init legacy_pty_init(void)
        pty_slave_driver->subtype = PTY_TYPE_SLAVE;
        pty_slave_driver->init_termios = tty_std_termios;
        pty_slave_driver->init_termios.c_cflag = B38400 | CS8 | CREAD;
+       pty_slave_driver->init_termios.c_ispeed = 38400;
+       pty_slave_driver->init_termios.c_ospeed = 38400;
        pty_slave_driver->flags = TTY_DRIVER_RESET_TERMIOS |
                                        TTY_DRIVER_REAL_RAW;
        pty_slave_driver->other = pty_driver;
@@ -366,6 +374,8 @@ static void __init unix98_pty_init(void)
        ptm_driver->init_termios.c_oflag = 0;
        ptm_driver->init_termios.c_cflag = B38400 | CS8 | CREAD;
        ptm_driver->init_termios.c_lflag = 0;
+       ptm_driver->init_termios.c_ispeed = 38400;
+       ptm_driver->init_termios.c_ospeed = 38400;
        ptm_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
                TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM;
        ptm_driver->other = pts_driver;
@@ -381,6 +391,8 @@ static void __init unix98_pty_init(void)
        pts_driver->subtype = PTY_TYPE_SLAVE;
        pts_driver->init_termios = tty_std_termios;
        pts_driver->init_termios.c_cflag = B38400 | CS8 | CREAD;
+       pts_driver->init_termios.c_ispeed = 38400;
+       pts_driver->init_termios.c_ospeed = 38400;
        pts_driver->flags = TTY_DRIVER_RESET_TERMIOS | TTY_DRIVER_REAL_RAW |
                TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_DEVPTS_MEM;
        pts_driver->other = ptm_driver;