ACPI: fix acpi_find_child_device() invocation in acpi_preset_companion()

[mirror_ubuntu-bionic-kernel.git] / include / linux / tty.h

diff --git a/include/linux/tty.h b/include/linux/tty.h
index 7ac8ba208b1fe27570ba3fa6e2576b90bab64927..6e44483028189ea5d9ba744d1bb74aed37f91103 100644 (file)
--- a/include/linux/tty.h
+++ b/include/linux/tty.h
@@ -364,6 +364,8 @@ struct tty_file_private {
 #define TTY_PTY_LOCK           16      /* pty private */
 #define TTY_NO_WRITE_SPLIT     17      /* Preserve write boundaries to driver */
 #define TTY_HUPPED             18      /* Post driver->hangup() */
+#define TTY_HUPPING            19      /* Hangup in progress */
+#define TTY_LDISC_CHANGING     20      /* Change pending - non-block IO */
 #define TTY_LDISC_HALTED       22      /* Line discipline is halted */
 
 /* Values for tty->flow_change */
@@ -381,6 +383,12 @@ static inline void tty_set_flow_change(struct tty_struct *tty, int val)
        smp_mb();
 }
 
+static inline bool tty_io_nonblock(struct tty_struct *tty, struct file *file)
+{
+       return file->f_flags & O_NONBLOCK ||
+               test_bit(TTY_LDISC_CHANGING, &tty->flags);
+}
+
 static inline bool tty_io_error(struct tty_struct *tty)
 {
        return test_bit(TTY_IO_ERROR, &tty->flags);
@@ -405,6 +413,8 @@ extern const char *tty_name(const struct tty_struct *tty);
 extern struct tty_struct *tty_kopen(dev_t device);
 extern void tty_kclose(struct tty_struct *tty);
 extern int tty_dev_name_to_number(const char *name, dev_t *number);
+extern int tty_ldisc_lock(struct tty_struct *tty, unsigned long timeout);
+extern void tty_ldisc_unlock(struct tty_struct *tty);
 #else
 static inline void tty_kref_put(struct tty_struct *tty)
 { }
@@ -552,6 +562,7 @@ extern struct tty_struct *tty_init_dev(struct tty_driver *driver, int idx);
 extern void tty_release_struct(struct tty_struct *tty, int idx);
 extern int tty_release(struct inode *inode, struct file *filp);
 extern void tty_init_termios(struct tty_struct *tty);
+extern void tty_save_termios(struct tty_struct *tty);
 extern int tty_standard_install(struct tty_driver *driver,
                struct tty_struct *tty);
 
@@ -698,7 +709,7 @@ extern int tty_unregister_ldisc(int disc);
 extern int tty_set_ldisc(struct tty_struct *tty, int disc);
 extern int tty_ldisc_setup(struct tty_struct *tty, struct tty_struct *o_tty);
 extern void tty_ldisc_release(struct tty_struct *tty);
-extern void tty_ldisc_init(struct tty_struct *tty);
+extern int __must_check tty_ldisc_init(struct tty_struct *tty);
 extern void tty_ldisc_deinit(struct tty_struct *tty);
 extern int tty_ldisc_receive_buf(struct tty_ldisc *ld, const unsigned char *p,
                                 char *f, int count);