user/sven/linux.git/include/linux/kbd_kern.h, branch v3.2.31

tty: stop using "delayed_work" in the tty layer

2011-03-22T23:17:32Z

Using delayed-work for tty flip buffers ends up causing us to wait for the next tick to complete some actions. That's usually not all that noticeable, but for certain latency-critical workloads it ends up being totally unacceptable. As an extreme case of this, passing a token back-and-forth over a pty will take two ticks per iteration, so even just a thousand iterations will take 8 seconds assuming a common 250Hz configuration. Avoiding the whole delayed work issue brings that ping-pong test-case down to 0.009s on my machine. In more practical terms, this latency has been a performance problem for things like dive computer simulators (simulating the serial interface using the ptys) and for other environments (Alan mentions a CP/M emulator). Reported-by: Jef Driesen Acked-by: Greg KH Acked-by: Alan Cox Signed-off-by: Linus Torvalds

vt: Add virtual console keyboard mode OFF

2011-02-17T19:12:40Z

virtual console: add keyboard mode OFF Add a new mode for the virtual console keyboard OFF in which all input other than shift keys is ignored. Prevents vt input buffers from overflowing when a program opens but doesn't read from a tty, like X11 using evdev for input. Signed-off-by: Arthur Taylor Signed-off-by: Greg Kroah-Hartman

Input: Mac button emulation - implement as an input filter

2010-01-30T09:47:49Z

Current implementation of Mac mouse button emulation plugs into legacy keyboard driver, converts certain keys into button events on a separate device, and suppresses the real events from reaching tty. This worked well enough until user space started using evdev which was completely unaware of this arrangement and kept sending original key presses to its users. Change the implementation to use newly added input filter framework so that original key presses are not transmitted to any handlers. As a bonus remove SYSCTL dependencies from the code and use Kconfig instead; also do not create the emulated mouse device until user activates emulation. Signed-off-by: Dmitry Torokhov

m68k/mac: Make mac_hid_mouse_emulate_buttons() declaration visible

2007-08-23T02:52:45Z

m68k/mac: Make mac_hid_mouse_emulate_buttons() declaration visible drivers/char/keyboard.c: In function 'kbd_keycode': drivers/char/keyboard.c:1142: error: implicit declaration of function 'mac_hid_mouse_emulate_buttons' The forward declaration of mac_hid_mouse_emulate_buttons() is not visible on m68k because it's hidden in the middle of a big #ifdef block. Move it to , correct the type of the second parameter, and include where needed. Signed-off-by: Geert Uytterhoeven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] swsusp: fix suspend when console is in VT_AUTO+KD_GRAPHICS mode

2007-03-17T02:25:05Z

When the console is in VT_AUTO+KD_GRAPHICS mode, switching to the SUSPEND_CONSOLE fails, resulting in vt_waitactive() waiting indefinitely or until the task is interrupted. This patch tests if a console switch can occur in set_console() and returns early if a console switch is not possible. [akpm@linux-foundation.org: cleanup] Signed-off-by: Andrew Johnson Acked-by: Pavel Machek Cc: "Antonino A. Daplas" Cc: "Rafael J. Wysocki" Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

WorkStruct: Separate delayable and non-delayable events.

2006-11-22T14:54:01Z

Separate delayable work items from non-delayable work items be splitting them into a separate structure (delayed_work), which incorporates a work_struct and the timer_list removed from work_struct. The work_struct struct is huge, and this limits it's usefulness. On a 64-bit architecture it's nearly 100 bytes in size. This reduces that by half for the non-delayable type of event. Signed-Off-By: David Howells

[PATCH] remove active field from tty buffer structure

2006-06-28T21:59:05Z

Remove 'active' field from tty buffer structure. This was added in 2.6.16 as part of a patch to make the new tty buffering SMP safe. This field is unnecessary with the more intelligently written flush_to_ldisc that adds receive_room handling. Removing this field reverts to simpler logic where the tail buffer is always the 'active' buffer, which should not be freed by flush_to_ldisc. (active == buffer being filled with new data) The result is simpler, smaller, and faster tty buffer code. Signed-off-by: Paul Fulghum Cc: Alan Cox Cc: Theodore Ts'o Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

Input: add support for Braille devices

2006-04-02T05:10:28Z

- Add KEY_BRL_* input keys and K_BRL_* keycodes; - Add emulation of how braille keyboards usually combine braille dots to the console keyboard driver; - Add handling of unicode U+28xy diacritics. Signed-off-by: Samuel Thibault Signed-off-by: Dmitry Torokhov

[PATCH] tty buffering stall fix

2006-02-10T16:13:12Z

Prevent stalled processing of received data when a driver allocates tty buffer space but does not immediately follow the allocation with more data and a call to schedule receive tty processing. (example: hvc_console) This bug was introduced by the first locking patch for the new tty buffering. Signed-off-by: Paul Fulghum Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

[PATCH] new tty buffering locking fix

2006-02-03T16:32:09Z

Change locking in the new tty buffering facility from using tty->read_lock, which is currently ignored by drivers and thus ineffective. New locking uses a new tty buffering specific lock enforced centrally in the tty buffering code. Two drivers (esp and cyclades) are updated to use the tty buffering functions instead of accessing tty buffering internals directly. This is required for the new locking to work. Minor checks for NULL buffers added to tty_prepare_flip_string/tty_prepare_flip_string_flags Signed-off-by: Paul Fulghum Cc: Alan Cox Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds