linux-toradex.git/include/linux/kbd_kern.h, branch v4.6-rc3

tty: Remove dead code

2013-07-26T23:19:48+00:00

-> The ledptrs[] array is never initialized.
-> There is no place where kbd->ledmode is set to LED_SHOW_MEM therefore the if
   statement does not make much sense.
-> Since LED_SHOW_MEM is not used, it can be removed from the header file as well.

Signed-off-by: Andreas Platschek 
Signed-off-by: Greg Kroah-Hartman

vt: fix the keyboard/led locking

2012-07-17T16:13:37+00:00

We touch the LED from both keyboard callback and direct paths. In
one case we've got the lock held way up the call chain and in the
other we haven't. This leads to complete insanity so fix it by giving
the LED bits their own lock.

Signed-off-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

TTY: vt, remove con_schedule_flip

2012-06-14T00:30:53+00:00

This is identical to tty_schedule_flip. So let us use that instead.

Signed-off-by: Jiri Slaby 
Signed-off-by: Greg Kroah-Hartman

vt:tackle kbd_table

2012-03-08T18:50:35+00:00

Keyboard struct lifetime is easy, but the locking is not and is completely
ignored by the existing code. Tackle this one head on

- Make the kbd_table private so we can run down all direct users
- Hoick the relevant ioctl handlers into the keyboard layer
- Lock them with the keyboard lock so they don't change mid keypress
- Add helpers for things like console stop/start so we isolate the poking
  around properly
- Tweak the braille console so it still builds

There are a couple of FIXME locking cases left for ioctls that are so hideous
they should be addressed in a later patch. After this patch the kbd_table is
private and all the keyboard jiggery pokery is in one place.

This update fixes speakup and also a memory leak in the original.

Signed-off-by: Alan Cox 
Signed-off-by: Greg Kroah-Hartman

tty: stop using "delayed_work" in the tty layer

2011-03-22T23:17:32+00:00

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

2011-02-17T19:12:40+00:00

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

2010-01-30T09:47:49+00:00

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

2007-08-23T02:52:45+00:00

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

2007-03-17T02:25:05+00:00

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.

2006-11-22T14:54:01+00:00

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