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authorAlan Cox <alan@redhat.com>2008-10-13 13:39:23 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-13 20:51:41 +0400
commit95f9bfc6b76e862265a2d70ae061eec18fe14140 (patch)
tree88e72e0d31b9f368d5c9dcb3e0d92994effe5edc /drivers
parent452a00d2ee288f2cbc36f676edd06cb14d2878c1 (diff)
downloadlinux-95f9bfc6b76e862265a2d70ae061eec18fe14140.tar.xz
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>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/char/tty_io.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/char/tty_io.c b/drivers/char/tty_io.c
index 4c0e4ed31a48..913b50258f90 100644
--- 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