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tty: Remove more special casing and out of place code
Carry on pushing code out of tty_io when it belongs to other drivers. I'm not 100% happy with some of this and it will be worth revisiting some of the exports later when the restructuring work is done. Signed-off-by: Alan Cox <alan@redhat.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
Linus Torvalds
parent
feebed6515
commit
d81ed10307
@ -23,6 +23,7 @@
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#include <linux/mm.h>
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#include <linux/init.h>
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#include <linux/sysctl.h>
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#include <linux/device.h>
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#include <asm/uaccess.h>
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#include <asm/system.h>
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@ -332,6 +333,8 @@ int pty_limit = NR_UNIX98_PTY_DEFAULT;
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static int pty_limit_min = 0;
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static int pty_limit_max = NR_UNIX98_PTY_MAX;
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static struct cdev ptmx_cdev;
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static struct ctl_table pty_table[] = {
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{
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.ctl_name = PTY_MAX,
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@ -408,6 +411,70 @@ static const struct tty_operations ptm_unix98_ops = {
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.shutdown = pty_shutdown
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};
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/**
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* ptmx_open - open a unix 98 pty master
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* @inode: inode of device file
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* @filp: file pointer to tty
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*
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* Allocate a unix98 pty master device from the ptmx driver.
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*
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* Locking: tty_mutex protects the init_dev work. tty->count should
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* protect the rest.
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* allocated_ptys_lock handles the list of free pty numbers
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*/
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static int __ptmx_open(struct inode *inode, struct file *filp)
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{
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struct tty_struct *tty;
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int retval;
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int index;
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nonseekable_open(inode, filp);
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/* find a device that is not in use. */
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index = devpts_new_index();
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if (index < 0)
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return index;
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mutex_lock(&tty_mutex);
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retval = tty_init_dev(ptm_driver, index, &tty, 1);
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mutex_unlock(&tty_mutex);
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if (retval)
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goto out;
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set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
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filp->private_data = tty;
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file_move(filp, &tty->tty_files);
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retval = devpts_pty_new(tty->link);
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if (retval)
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goto out1;
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retval = ptm_driver->ops->open(tty, filp);
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if (!retval)
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return 0;
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out1:
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tty_release_dev(filp);
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return retval;
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out:
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devpts_kill_index(index);
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return retval;
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}
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static int ptmx_open(struct inode *inode, struct file *filp)
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{
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int ret;
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lock_kernel();
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ret = __ptmx_open(inode, filp);
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unlock_kernel();
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return ret;
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}
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static struct file_operations ptmx_fops;
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static void __init unix98_pty_init(void)
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{
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ptm_driver = alloc_tty_driver(NR_UNIX98_PTY_MAX);
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@ -459,7 +526,18 @@ static void __init unix98_pty_init(void)
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pty_table[1].data = &ptm_driver->refcount;
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register_sysctl_table(pty_root_table);
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/* Now create the /dev/ptmx special device */
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tty_default_fops(&ptmx_fops);
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ptmx_fops.open = ptmx_open;
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cdev_init(&ptmx_cdev, &ptmx_fops);
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if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
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register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
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panic("Couldn't register /dev/ptmx driver\n");
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device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
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}
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#else
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static inline void unix98_pty_init(void) { }
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#endif
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@ -49,7 +49,7 @@
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* implement CONFIG_VT and generalize console device interface.
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* -- Marko Kohtala <Marko.Kohtala@hut.fi>, March 97
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*
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* Rewrote init_dev and release_dev to eliminate races.
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* Rewrote tty_init_dev and tty_release_dev to eliminate races.
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* -- Bill Hawes <whawes@star.net>, June 97
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*
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* Added devfs support.
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@ -136,11 +136,6 @@ LIST_HEAD(tty_drivers); /* linked list of tty drivers */
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DEFINE_MUTEX(tty_mutex);
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EXPORT_SYMBOL(tty_mutex);
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#ifdef CONFIG_UNIX98_PTYS
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extern struct tty_driver *ptm_driver; /* Unix98 pty masters; for /dev/ptmx */
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static int ptmx_open(struct inode *, struct file *);
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#endif
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static void initialize_tty_struct(struct tty_struct *tty);
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static ssize_t tty_read(struct file *, char __user *, size_t, loff_t *);
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@ -425,20 +420,6 @@ static const struct file_operations tty_fops = {
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.fasync = tty_fasync,
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};
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#ifdef CONFIG_UNIX98_PTYS
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static const struct file_operations ptmx_fops = {
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.llseek = no_llseek,
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.read = tty_read,
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.write = tty_write,
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.poll = tty_poll,
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.unlocked_ioctl = tty_ioctl,
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.compat_ioctl = tty_compat_ioctl,
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.open = ptmx_open,
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.release = tty_release,
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.fasync = tty_fasync,
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};
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#endif
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static const struct file_operations console_fops = {
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.llseek = no_llseek,
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.read = tty_read,
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@ -1224,7 +1205,7 @@ static void tty_line_name(struct tty_driver *driver, int index, char *p)
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}
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/**
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* init_dev - initialise a tty device
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* tty_init_dev - initialise a tty device
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* @driver: tty driver we are opening a device on
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* @idx: device index
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* @ret_tty: returned tty structure
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@ -1248,7 +1229,7 @@ static void tty_line_name(struct tty_driver *driver, int index, char *p)
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* relaxed for the (most common) case of reopening a tty.
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*/
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static int init_dev(struct tty_driver *driver, int idx,
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int tty_init_dev(struct tty_driver *driver, int idx,
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struct tty_struct **ret_tty, int first_ok)
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{
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struct tty_struct *tty, *o_tty;
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@ -1269,8 +1250,8 @@ static int init_dev(struct tty_driver *driver, int idx,
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goto end_init;
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}
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/*
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* It's safe from now on because init_dev() is called with
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* tty_mutex held and release_dev() won't change tty->count
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* It's safe from now on because tty_init_dev() is called with
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* tty_mutex held and tty_release_dev() won't change tty->count
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* or tty->flags without having to grab tty_mutex
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*/
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if (tty && driver->subtype == PTY_TYPE_MASTER)
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@ -1449,7 +1430,7 @@ fast_track:
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/* FIXME */
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if (!test_bit(TTY_LDISC, &tty->flags))
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printk(KERN_ERR "init_dev but no ldisc\n");
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printk(KERN_ERR "tty_init_dev but no ldisc\n");
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success:
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*ret_tty = tty;
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@ -1476,7 +1457,7 @@ fail_no_mem:
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/* call the tty release_tty routine to clean out this slot */
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release_mem_out:
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if (printk_ratelimit())
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printk(KERN_INFO "init_dev: ldisc open failed, "
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printk(KERN_INFO "tty_init_dev: ldisc open failed, "
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"clearing slot %d\n", idx);
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release_tty(tty, idx);
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goto end_init;
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@ -1587,7 +1568,7 @@ static void release_tty(struct tty_struct *tty, int idx)
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* WSH 09/09/97: rewritten to avoid some nasty race conditions that could
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* lead to double frees or releasing memory still in use.
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*/
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static void release_dev(struct file *filp)
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void tty_release_dev(struct file *filp)
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{
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struct tty_struct *tty, *o_tty;
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int pty_master, tty_closing, o_tty_closing, do_sleep;
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@ -1597,10 +1578,10 @@ static void release_dev(struct file *filp)
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tty = (struct tty_struct *)filp->private_data;
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if (tty_paranoia_check(tty, filp->f_path.dentry->d_inode,
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"release_dev"))
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"tty_release_dev"))
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return;
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check_tty_count(tty, "release_dev");
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check_tty_count(tty, "tty_release_dev");
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tty_fasync(-1, filp, 0);
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@ -1612,24 +1593,24 @@ static void release_dev(struct file *filp)
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#ifdef TTY_PARANOIA_CHECK
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if (idx < 0 || idx >= tty->driver->num) {
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printk(KERN_DEBUG "release_dev: bad idx when trying to "
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printk(KERN_DEBUG "tty_release_dev: bad idx when trying to "
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"free (%s)\n", tty->name);
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return;
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}
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if (!(tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)) {
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if (tty != tty->driver->ttys[idx]) {
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printk(KERN_DEBUG "release_dev: driver.table[%d] not tty "
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printk(KERN_DEBUG "tty_release_dev: driver.table[%d] not tty "
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"for (%s)\n", idx, tty->name);
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return;
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}
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if (tty->termios != tty->driver->termios[idx]) {
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printk(KERN_DEBUG "release_dev: driver.termios[%d] not termios "
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printk(KERN_DEBUG "tty_release_dev: driver.termios[%d] not termios "
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"for (%s)\n",
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idx, tty->name);
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return;
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}
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if (tty->termios_locked != tty->driver->termios_locked[idx]) {
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printk(KERN_DEBUG "release_dev: driver.termios_locked[%d] not "
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printk(KERN_DEBUG "tty_release_dev: driver.termios_locked[%d] not "
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"termios_locked for (%s)\n",
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idx, tty->name);
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return;
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@ -1638,7 +1619,7 @@ static void release_dev(struct file *filp)
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#endif
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#ifdef TTY_DEBUG_HANGUP
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printk(KERN_DEBUG "release_dev of %s (tty count=%d)...",
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printk(KERN_DEBUG "tty_release_dev of %s (tty count=%d)...",
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tty_name(tty, buf), tty->count);
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#endif
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@ -1646,26 +1627,26 @@ static void release_dev(struct file *filp)
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if (tty->driver->other &&
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!(tty->driver->flags & TTY_DRIVER_DEVPTS_MEM)) {
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if (o_tty != tty->driver->other->ttys[idx]) {
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printk(KERN_DEBUG "release_dev: other->table[%d] "
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printk(KERN_DEBUG "tty_release_dev: other->table[%d] "
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"not o_tty for (%s)\n",
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idx, tty->name);
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return;
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}
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if (o_tty->termios != tty->driver->other->termios[idx]) {
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printk(KERN_DEBUG "release_dev: other->termios[%d] "
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printk(KERN_DEBUG "tty_release_dev: other->termios[%d] "
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"not o_termios for (%s)\n",
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idx, tty->name);
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return;
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}
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if (o_tty->termios_locked !=
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tty->driver->other->termios_locked[idx]) {
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printk(KERN_DEBUG "release_dev: other->termios_locked["
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printk(KERN_DEBUG "tty_release_dev: other->termios_locked["
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"%d] not o_termios_locked for (%s)\n",
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idx, tty->name);
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return;
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}
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if (o_tty->link != tty) {
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printk(KERN_DEBUG "release_dev: bad pty pointers\n");
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printk(KERN_DEBUG "tty_release_dev: bad pty pointers\n");
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return;
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}
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}
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@ -1723,7 +1704,7 @@ static void release_dev(struct file *filp)
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if (!do_sleep)
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break;
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printk(KERN_WARNING "release_dev: %s: read/write wait queue "
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printk(KERN_WARNING "tty_release_dev: %s: read/write wait queue "
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"active!\n", tty_name(tty, buf));
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mutex_unlock(&tty_mutex);
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schedule();
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@ -1736,14 +1717,14 @@ static void release_dev(struct file *filp)
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*/
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if (pty_master) {
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if (--o_tty->count < 0) {
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printk(KERN_WARNING "release_dev: bad pty slave count "
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printk(KERN_WARNING "tty_release_dev: bad pty slave count "
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"(%d) for %s\n",
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o_tty->count, tty_name(o_tty, buf));
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o_tty->count = 0;
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}
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}
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if (--tty->count < 0) {
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printk(KERN_WARNING "release_dev: bad tty->count (%d) for %s\n",
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printk(KERN_WARNING "tty_release_dev: bad tty->count (%d) for %s\n",
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tty->count, tty_name(tty, buf));
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tty->count = 0;
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}
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@ -1825,7 +1806,7 @@ static void release_dev(struct file *filp)
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* The termios state of a pty is reset on first open so that
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* settings don't persist across reuse.
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*
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* Locking: tty_mutex protects tty, get_tty_driver and init_dev work.
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* Locking: tty_mutex protects tty, get_tty_driver and tty_init_dev work.
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* tty->count should protect the rest.
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* ->siglock protects ->signal/->sighand
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*/
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@ -1889,7 +1870,7 @@ retry_open:
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return -ENODEV;
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}
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got_driver:
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retval = init_dev(driver, index, &tty, 0);
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retval = tty_init_dev(driver, index, &tty, 0);
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mutex_unlock(&tty_mutex);
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if (retval)
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return retval;
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@ -1920,7 +1901,7 @@ got_driver:
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printk(KERN_DEBUG "error %d in opening %s...", retval,
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tty->name);
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#endif
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release_dev(filp);
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tty_release_dev(filp);
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if (retval != -ERESTARTSYS)
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return retval;
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if (signal_pending(current))
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@ -1959,69 +1940,6 @@ static int tty_open(struct inode *inode, struct file *filp)
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#ifdef CONFIG_UNIX98_PTYS
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/**
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* ptmx_open - open a unix 98 pty master
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* @inode: inode of device file
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* @filp: file pointer to tty
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*
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* Allocate a unix98 pty master device from the ptmx driver.
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*
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* Locking: tty_mutex protects theinit_dev work. tty->count should
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* protect the rest.
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* allocated_ptys_lock handles the list of free pty numbers
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*/
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static int __ptmx_open(struct inode *inode, struct file *filp)
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{
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struct tty_struct *tty;
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int retval;
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int index;
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nonseekable_open(inode, filp);
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/* find a device that is not in use. */
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index = devpts_new_index();
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if (index < 0)
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return index;
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mutex_lock(&tty_mutex);
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retval = init_dev(ptm_driver, index, &tty, 1);
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mutex_unlock(&tty_mutex);
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if (retval)
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goto out;
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set_bit(TTY_PTY_LOCK, &tty->flags); /* LOCK THE SLAVE */
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filp->private_data = tty;
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file_move(filp, &tty->tty_files);
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retval = devpts_pty_new(tty->link);
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if (retval)
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goto out1;
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check_tty_count(tty, "ptmx_open");
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retval = ptm_driver->ops->open(tty, filp);
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if (!retval)
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return 0;
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out1:
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release_dev(filp);
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return retval;
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out:
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devpts_kill_index(index);
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return retval;
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}
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static int ptmx_open(struct inode *inode, struct file *filp)
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{
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int ret;
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lock_kernel();
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ret = __ptmx_open(inode, filp);
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unlock_kernel();
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return ret;
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}
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#endif
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/**
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* tty_release - vfs callback for close
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@ -2032,13 +1950,13 @@ static int ptmx_open(struct inode *inode, struct file *filp)
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* this tty. There may however be several such references.
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*
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* Locking:
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* Takes bkl. See release_dev
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* Takes bkl. See tty_release_dev
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*/
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static int tty_release(struct inode *inode, struct file *filp)
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{
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lock_kernel();
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release_dev(filp);
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tty_release_dev(filp);
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unlock_kernel();
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return 0;
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}
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@ -2932,7 +2850,7 @@ int tty_put_char(struct tty_struct *tty, unsigned char ch)
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EXPORT_SYMBOL_GPL(tty_put_char);
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static struct class *tty_class;
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struct class *tty_class;
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/**
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* tty_register_device - register a tty device
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@ -3197,6 +3115,11 @@ struct tty_struct *get_current_tty(void)
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}
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EXPORT_SYMBOL_GPL(get_current_tty);
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void tty_default_fops(struct file_operations *fops)
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{
|
||||
*fops = tty_fops;
|
||||
}
|
||||
|
||||
/*
|
||||
* Initialize the console device. This is called *early*, so
|
||||
* we can't necessarily depend on lots of kernel help here.
|
||||
@ -3234,12 +3157,6 @@ postcore_initcall(tty_class_init);
|
||||
/* 3/2004 jmc: why do these devices exist? */
|
||||
|
||||
static struct cdev tty_cdev, console_cdev;
|
||||
#ifdef CONFIG_UNIX98_PTYS
|
||||
static struct cdev ptmx_cdev;
|
||||
#endif
|
||||
#ifdef CONFIG_VT
|
||||
static struct cdev vc0_cdev;
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Ok, now we can initialize the rest of the tty devices and can count
|
||||
@ -3251,32 +3168,18 @@ static int __init tty_init(void)
|
||||
if (cdev_add(&tty_cdev, MKDEV(TTYAUX_MAJOR, 0), 1) ||
|
||||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 0), 1, "/dev/tty") < 0)
|
||||
panic("Couldn't register /dev/tty driver\n");
|
||||
device_create_drvdata(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL,
|
||||
device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 0), NULL,
|
||||
"tty");
|
||||
|
||||
cdev_init(&console_cdev, &console_fops);
|
||||
if (cdev_add(&console_cdev, MKDEV(TTYAUX_MAJOR, 1), 1) ||
|
||||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 1), 1, "/dev/console") < 0)
|
||||
panic("Couldn't register /dev/console driver\n");
|
||||
device_create_drvdata(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL,
|
||||
device_create(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 1), NULL,
|
||||
"console");
|
||||
|
||||
#ifdef CONFIG_UNIX98_PTYS
|
||||
cdev_init(&ptmx_cdev, &ptmx_fops);
|
||||
if (cdev_add(&ptmx_cdev, MKDEV(TTYAUX_MAJOR, 2), 1) ||
|
||||
register_chrdev_region(MKDEV(TTYAUX_MAJOR, 2), 1, "/dev/ptmx") < 0)
|
||||
panic("Couldn't register /dev/ptmx driver\n");
|
||||
device_create_drvdata(tty_class, NULL, MKDEV(TTYAUX_MAJOR, 2), NULL, "ptmx");
|
||||
#endif
|
||||
|
||||
#ifdef CONFIG_VT
|
||||
cdev_init(&vc0_cdev, &console_fops);
|
||||
if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
|
||||
register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
|
||||
panic("Couldn't register /dev/tty0 driver\n");
|
||||
device_create_drvdata(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
|
||||
|
||||
vty_init();
|
||||
vty_init(&console_fops);
|
||||
#endif
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -40,6 +40,15 @@
|
||||
#define TERMIOS_OLD 8
|
||||
|
||||
|
||||
/**
|
||||
* tty_chars_in_buffer - characters pending
|
||||
* @tty: terminal
|
||||
*
|
||||
* Return the number of bytes of data in the device private
|
||||
* output queue. If no private method is supplied there is assumed
|
||||
* to be no queue on the device.
|
||||
*/
|
||||
|
||||
int tty_chars_in_buffer(struct tty_struct *tty)
|
||||
{
|
||||
if (tty->ops->chars_in_buffer)
|
||||
@ -47,26 +56,49 @@ int tty_chars_in_buffer(struct tty_struct *tty)
|
||||
else
|
||||
return 0;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(tty_chars_in_buffer);
|
||||
|
||||
/**
|
||||
* tty_write_room - write queue space
|
||||
* @tty: terminal
|
||||
*
|
||||
* Return the number of bytes that can be queued to this device
|
||||
* at the present time. The result should be treated as a guarantee
|
||||
* and the driver cannot offer a value it later shrinks by more than
|
||||
* the number of bytes written. If no method is provided 2K is always
|
||||
* returned and data may be lost as there will be no flow control.
|
||||
*/
|
||||
|
||||
int tty_write_room(struct tty_struct *tty)
|
||||
{
|
||||
if (tty->ops->write_room)
|
||||
return tty->ops->write_room(tty);
|
||||
return 2048;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(tty_write_room);
|
||||
|
||||
/**
|
||||
* tty_driver_flush_buffer - discard internal buffer
|
||||
* @tty: terminal
|
||||
*
|
||||
* Discard the internal output buffer for this device. If no method
|
||||
* is provided then either the buffer cannot be hardware flushed or
|
||||
* there is no buffer driver side.
|
||||
*/
|
||||
void tty_driver_flush_buffer(struct tty_struct *tty)
|
||||
{
|
||||
if (tty->ops->flush_buffer)
|
||||
tty->ops->flush_buffer(tty);
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(tty_driver_flush_buffer);
|
||||
|
||||
/**
|
||||
* tty_throttle - flow control
|
||||
* @tty: terminal
|
||||
*
|
||||
* Indicate that a tty should stop transmitting data down the stack.
|
||||
*/
|
||||
|
||||
void tty_throttle(struct tty_struct *tty)
|
||||
{
|
||||
/* check TTY_THROTTLED first so it indicates our state */
|
||||
@ -76,6 +108,13 @@ void tty_throttle(struct tty_struct *tty)
|
||||
}
|
||||
EXPORT_SYMBOL(tty_throttle);
|
||||
|
||||
/**
|
||||
* tty_unthrottle - flow control
|
||||
* @tty: terminal
|
||||
*
|
||||
* Indicate that a tty may continue transmitting data down the stack.
|
||||
*/
|
||||
|
||||
void tty_unthrottle(struct tty_struct *tty)
|
||||
{
|
||||
if (test_and_clear_bit(TTY_THROTTLED, &tty->flags) &&
|
||||
@ -112,6 +151,11 @@ void tty_wait_until_sent(struct tty_struct *tty, long timeout)
|
||||
}
|
||||
EXPORT_SYMBOL(tty_wait_until_sent);
|
||||
|
||||
|
||||
/*
|
||||
* Termios Helper Methods
|
||||
*/
|
||||
|
||||
static void unset_locked_termios(struct ktermios *termios,
|
||||
struct ktermios *old,
|
||||
struct ktermios *locked)
|
||||
@ -346,6 +390,16 @@ void tty_termios_encode_baud_rate(struct ktermios *termios,
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(tty_termios_encode_baud_rate);
|
||||
|
||||
/**
|
||||
* tty_encode_baud_rate - set baud rate of the tty
|
||||
* @ibaud: input baud rate
|
||||
* @obad: output baud rate
|
||||
*
|
||||
* Update the current termios data for the tty with the new speed
|
||||
* settings. The caller must hold the termios_mutex for the tty in
|
||||
* question.
|
||||
*/
|
||||
|
||||
void tty_encode_baud_rate(struct tty_struct *tty, speed_t ibaud, speed_t obaud)
|
||||
{
|
||||
tty_termios_encode_baud_rate(tty->termios, ibaud, obaud);
|
||||
@ -430,7 +484,7 @@ EXPORT_SYMBOL(tty_termios_hw_change);
|
||||
* is a bit of layering violation here with n_tty in terms of the
|
||||
* internal knowledge of this function.
|
||||
*
|
||||
* Locking: termios_sem
|
||||
* Locking: termios_mutex
|
||||
*/
|
||||
|
||||
static void change_termios(struct tty_struct *tty, struct ktermios *new_termios)
|
||||
@ -508,7 +562,7 @@ static void change_termios(struct tty_struct *tty, struct ktermios *new_termios)
|
||||
* functions before using change_termios to do the actual changes.
|
||||
*
|
||||
* Locking:
|
||||
* Called functions take ldisc and termios_sem locks
|
||||
* Called functions take ldisc and termios_mutex locks
|
||||
*/
|
||||
|
||||
static int set_termios(struct tty_struct *tty, void __user *arg, int opt)
|
||||
@ -715,7 +769,7 @@ static void set_sgflags(struct ktermios *termios, int flags)
|
||||
* Updates a terminal from the legacy BSD style terminal information
|
||||
* structure.
|
||||
*
|
||||
* Locking: termios_sem
|
||||
* Locking: termios_mutex
|
||||
*/
|
||||
|
||||
static int set_sgttyb(struct tty_struct *tty, struct sgttyb __user *sgttyb)
|
||||
|
||||
@ -100,10 +100,10 @@
|
||||
#include <linux/font.h>
|
||||
#include <linux/bitops.h>
|
||||
#include <linux/notifier.h>
|
||||
|
||||
#include <asm/io.h>
|
||||
#include <linux/device.h>
|
||||
#include <linux/io.h>
|
||||
#include <asm/system.h>
|
||||
#include <asm/uaccess.h>
|
||||
#include <linux/uaccess.h>
|
||||
|
||||
#define MAX_NR_CON_DRIVER 16
|
||||
|
||||
@ -2352,8 +2352,6 @@ rescan_last_byte:
|
||||
FLUSH
|
||||
console_conditional_schedule();
|
||||
release_console_sem();
|
||||
|
||||
out:
|
||||
notify_update(vc);
|
||||
return n;
|
||||
#undef FLUSH
|
||||
@ -2784,13 +2782,6 @@ static int con_open(struct tty_struct *tty, struct file *filp)
|
||||
return ret;
|
||||
}
|
||||
|
||||
/*
|
||||
* We take tty_mutex in here to prevent another thread from coming in via init_dev
|
||||
* and taking a ref against the tty while we're in the process of forgetting
|
||||
* about it and cleaning things up.
|
||||
*
|
||||
* This is because vcs_remove_sysfs() can sleep and will drop the BKL.
|
||||
*/
|
||||
static void con_close(struct tty_struct *tty, struct file *filp)
|
||||
{
|
||||
/* Nothing to do - we defer to shutdown */
|
||||
@ -2932,8 +2923,16 @@ static const struct tty_operations con_ops = {
|
||||
.shutdown = con_shutdown
|
||||
};
|
||||
|
||||
int __init vty_init(void)
|
||||
static struct cdev vc0_cdev;
|
||||
|
||||
int __init vty_init(const struct file_operations *console_fops)
|
||||
{
|
||||
cdev_init(&vc0_cdev, console_fops);
|
||||
if (cdev_add(&vc0_cdev, MKDEV(TTY_MAJOR, 0), 1) ||
|
||||
register_chrdev_region(MKDEV(TTY_MAJOR, 0), 1, "/dev/vc/0") < 0)
|
||||
panic("Couldn't register /dev/tty0 driver\n");
|
||||
device_create(tty_class, NULL, MKDEV(TTY_MAJOR, 0), NULL, "tty0");
|
||||
|
||||
vcs_init();
|
||||
|
||||
console_driver = alloc_tty_driver(MAX_NR_CONSOLES);
|
||||
@ -2952,7 +2951,6 @@ int __init vty_init(void)
|
||||
tty_set_operations(console_driver, &con_ops);
|
||||
if (tty_register_driver(console_driver))
|
||||
panic("Couldn't register console driver\n");
|
||||
|
||||
kbd_init();
|
||||
console_map_init();
|
||||
#ifdef CONFIG_PROM_CONSOLE
|
||||
@ -3446,7 +3444,7 @@ int register_con_driver(const struct consw *csw, int first, int last)
|
||||
if (retval)
|
||||
goto err;
|
||||
|
||||
con_driver->dev = device_create_drvdata(vtconsole_class, NULL,
|
||||
con_driver->dev = device_create(vtconsole_class, NULL,
|
||||
MKDEV(0, con_driver->node),
|
||||
NULL, "vtcon%i",
|
||||
con_driver->node);
|
||||
@ -3557,7 +3555,7 @@ static int __init vtconsole_class_init(void)
|
||||
struct con_driver *con = ®istered_con_driver[i];
|
||||
|
||||
if (con->con && !con->dev) {
|
||||
con->dev = device_create_drvdata(vtconsole_class, NULL,
|
||||
con->dev = device_create(vtconsole_class, NULL,
|
||||
MKDEV(0, con->node),
|
||||
NULL, "vtcon%i",
|
||||
con->node);
|
||||
|
||||
@ -314,6 +314,8 @@ extern int kmsg_redirect;
|
||||
extern void console_init(void);
|
||||
extern int vcs_init(void);
|
||||
|
||||
extern struct class *tty_class;
|
||||
|
||||
/**
|
||||
* tty_kref_get - get a tty reference
|
||||
* @tty: tty device
|
||||
@ -398,6 +400,10 @@ extern int tty_perform_flush(struct tty_struct *tty, unsigned long arg);
|
||||
extern dev_t tty_devnum(struct tty_struct *tty);
|
||||
extern void proc_clear_tty(struct task_struct *p);
|
||||
extern struct tty_struct *get_current_tty(void);
|
||||
extern void tty_default_fops(struct file_operations *fops);
|
||||
extern int tty_init_dev(struct tty_driver *driver, int idx,
|
||||
struct tty_struct **ret_tty, int first_ok);
|
||||
extern void tty_release_dev(struct file *filp);
|
||||
|
||||
extern struct mutex tty_mutex;
|
||||
|
||||
|
||||
@ -96,7 +96,7 @@ void change_console(struct vc_data *new_vc);
|
||||
void reset_vc(struct vc_data *vc);
|
||||
extern int unbind_con_driver(const struct consw *csw, int first, int last,
|
||||
int deflt);
|
||||
int vty_init(void);
|
||||
int vty_init(const struct file_operations *console_fops);
|
||||
|
||||
/*
|
||||
* vc_screen.c shares this temporary buffer with the console write code so that
|
||||
|
||||
Loading…
Reference in New Issue
Block a user