[PATCH] linux: Use K_OFF VT KB mode over K_RAW if available.

[Adam Jackson]

On 1/6/12 2:21 AM, Arthur Taylor wrote:
> Linux kernels since 2.6.38 (March 2011) have an VT KB mode K_OFF in
> which special keys (like Ctrl+C) are not interpreted and input is not
> buffered. Use of this mode over K_RAW removes the need for a
> xf86ConsoleHandler to drain the VT input buffer, removing the grief it
> causes when it goes wrong or is (de)initialized out-of-order. (This
> also saves a few needless context switches per key event.)
>
> If K_OFF is not defined or not understood by the kernel, K_RAW and the
> previous method is used as a fall-back.
>
> Signed-off-by: Arthur Taylor<art at ified.ca>

Reviewed-by: Adam Jackson <ajax at redhat.com>

Merged in my 1.12 tree.

- ajax