On 03/14/2016 08:16 AM, Geert Uytterhoeven wrote: > Signed-off-by: Geert Uytterhoeven <geert+rene...@glider.be> > --- > Documentation/serial/driver | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/Documentation/serial/driver b/Documentation/serial/driver > index 61d520dea4c6e13a..50f3d94ed50b341e 100644 > --- a/Documentation/serial/driver > +++ b/Documentation/serial/driver > @@ -126,6 +126,13 @@ hardware. > Interrupts: locally disabled. > This call must not sleep > > + throttle(port) > + Notify the serial driver that input buffers for the line discipline are > + close to full, and it should somehow signal that no more characters > + should be sent to the serial port. > + > + Locking: none.
While it's true that no _serial_ locking is performed, the tty core serializes throttle() and unthrottle(), and further guarantees termios values will not be modified concurrently with throttle()/unthrottle(). > + > send_xchar(port,ch) > Transmit a high priority character, even if the port is stopped. > This is used to implement XON/XOFF flow control and tcflow(). If > -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
