tty: Move tty_write_message out of kernel/printk

This is pure tty code so put it in the tty layer where it can be with the
locking relevant material it uses

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

diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 4c0e4ed31a4822ae56906bd44c7f1c46019cb77d..913b50258f903f74367f475cb69f1747492c0bfc 100644 (file)
--- a/drivers/char/tty_io.c
+++ b/drivers/char/tty_io.c
@@ -1081,6 +1081,31 @@ out:
        return ret;
 }
 
+/**
+ * tty_write_message - write a message to a certain tty, not just the console.
+ * @tty: the destination tty_struct
+ * @msg: the message to write
+ *
+ * This is used for messages that need to be redirected to a specific tty.
+ * We don't put it into the syslog queue right now maybe in the future if
+ * really needed.
+ *
+ * We must still hold the BKL and test the CLOSING flag for the moment.
+ */
+
+void tty_write_message(struct tty_struct *tty, char *msg)
+{
+       lock_kernel();
+       if (tty) {
+               mutex_lock(&tty->atomic_write_lock);
+               if (tty->ops->write && !test_bit(TTY_CLOSING, &tty->flags))
+                       tty->ops->write(tty, msg, strlen(msg));
+               tty_write_unlock(tty);
+       }
+       unlock_kernel();
+       return;
+}
+
 
 /**
  *     tty_write               -       write method for tty device file

diff --git a/kernel/printk.c b/kernel/printk.c
index b51b1567bb5570dfc5b4a19bffd5af865d254e77..a430fd04008b4b9565434ebefa0ee48a62dade90 100644 (file)
--- a/kernel/printk.c
+++ b/kernel/printk.c
@@ -1291,22 +1291,6 @@ static int __init disable_boot_consoles(void)
 }
 late_initcall(disable_boot_consoles);
 
-/**
- * tty_write_message - write a message to a certain tty, not just the console.
- * @tty: the destination tty_struct
- * @msg: the message to write
- *
- * This is used for messages that need to be redirected to a specific tty.
- * We don't put it into the syslog queue right now maybe in the future if
- * really needed.
- */
-void tty_write_message(struct tty_struct *tty, char *msg)
-{
-       if (tty && tty->ops->write)
-               tty->ops->write(tty, msg, strlen(msg));
-       return;
-}
-
 #if defined CONFIG_PRINTK
 
 /*