linux-toradex.git/include/linux/vt_kern.h, branch v3.0.16

tty,vcs removing con_buf/conf_buf_mtx

2011-02-17T19:13:19+00:00

seems there's no longer need for using con_buf/conf_buf_mtx
as vcs_read/vcs_write buffer for user's data.

The do_con_write function, that was the other user of this,
is currently using its own kmalloc-ed buffer.

Not sure when this got changed, as I was able to find this code
in 2.6.9, but it's already gone as far as current git history
goes - 2.6.12-rc2.

AFAICS there's a behaviour change with the current change.
The lseek is not completely mutually exclusive with the
vcs_read/vcs_write - the file->f_pos might get updated
via lseek callback during the vcs_read/vcs_write processing.

I tried to find out if the prefered behaviour is to keep
this in sync within read/write/lseek functions, but I did
not find any pattern on different places.

I guess if user end up calling write/lseek from different
threads she should know what she's doing. If needed we
could use dedicated fd mutex/buffer.

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

vt: Fix warning: statement with no effect due to vt_kern.h

2010-08-10T20:47:44+00:00

Using:

	gcc (GCC) 4.5.0 20100610 (prerelease)

with CONFIG_CONSOLE_TRANSLATIONS=n, the following warnings are seen:

	drivers/char/vt_ioctl.c: In function ‘vt_ioctl’:
	drivers/char/vt_ioctl.c:1309:4: warning: statement with no effect
	drivers/char/vt.c: In function ‘vc_allocate’:
	drivers/char/vt.c:774:3: warning: statement with no effect
	drivers/video/console/vgacon.c: In function ‘vgacon_init’:
	drivers/video/console/vgacon.c:587:3: warning: statement with no effect
	drivers/video/console/vgacon.c: In function ‘vgacon_deinit’:
	drivers/video/console/vgacon.c:606:2: warning: statement with no effect
	drivers/video/console/fbcon.c: In function ‘fbcon_init’:
	drivers/video/console/fbcon.c:1087:3: warning: statement with no effect
	drivers/video/console/fbcon.c:1089:3: warning: statement with no effect
	drivers/video/console/fbcon.c: In function ‘fbcon_set_disp’:
	drivers/video/console/fbcon.c:1369:3: warning: statement with no effect
	drivers/video/console/fbcon.c:1371:3: warning: statement with no effect

This is because several functions in include/linux/vt_kern.h are
defined to (0).  Convert them to static inline functions to
silence the warnings and gain a bit of type safety.

Signed-off-by: Kevin Winchester 
Signed-off-by: Greg Kroah-Hartman

vt/console: try harder to print output when panicing

2010-08-10T20:47:40+00:00

Jesse's initial patch commit said:

"At panic time (i.e.  when oops_in_progress is set) we should try a bit
harder to update the screen and make sure output gets to the VT, since
some drivers are capable of flipping back to it.

So make sure we try to unblank and update the display if called from a
panic context."

I've enhanced this to add a flag to the vc that console layer can set to
indicate they want this behaviour to occur.  This also adds support to
fbcon for that flag and adds an fb flag for drivers to indicate they want
to use the support.  It enables this for KMS drivers.

Signed-off-by: Dave Airlie 
Signed-off-by: Jesse Barnes 
Acked-by: James Simmons 
Cc: Alan Cox 
Signed-off-by: Andrew Morton 
Signed-off-by: Greg Kroah-Hartman

vc: Add support for hiding the cursor when creating VTs

2009-11-13T23:54:27+00:00

Add support for setting a global default for whether or not a visible
cursor should be enabled when creating VCs. The default will be to do so,
unless overridden by the user at boot time or by a driver.

Signed-off-by: Matthew Garrett 
LKML-Reference: <1258143251-5818-1-git-send-email-mjg@redhat.com>
Signed-off-by: H. Peter Anvin

vt: move kernel stuff out of vt.h

2009-09-19T20:13:25+00:00

We have vt_kern.h for this


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

vt: remove power stuff from kernel/power

2009-09-19T20:13:25+00:00

In the past someone gratuitiously borrowed chunks of kernel internal vt
code and dumped them in kernel/power. They have all sorts of deep relations
with the vt code so put them in the vt tree instead

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

vt: add an event interface

2009-09-19T20:13:24+00:00

This is needed and requested in various forms for ConsoleKit, screenblank
handling and the like so do the job with a single interface. Also build the
interface so that unlike VT_WAITACTIVE and friends it won't miss events.

FIXME: Should this be a waitactive ioctl or a new device file you can poll
and read events from. We need the code anyway to fix up the existing broken
wait for console switch logic but the ConsoleKit people would prefer the
new device to the ioctl we have here

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

tty: Remove more special casing and out of place code

2008-10-13T16:51:42+00:00

Carry on pushing code out of tty_io when it belongs to other drivers. I'm
not 100% happy with some of this and it will be worth revisiting some of the
exports later when the restructuring work is done.

Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

tty: remove resize window special case

2008-08-15T17:34:07+00:00

This moves it to being a tty operation. That removes special cases and now
also means that resize can be picked up by um and other non vt consoles
which may have a resize operation.

Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

drivers/video/console/promcon.c: fix build error

2008-08-03T08:51:30+00:00

drivers/video/console/promcon.c:158: error: implicit declaration of
function 'con_protect_unimap'

Introduced by commit a29ccf6f823a84d89e1c7aaaf221cf7282022024
("embedded: fix vc_translate operator precedence").

Signed-off-by: Alexander Beregalov 
Cc: Tim Bird 
Signed-off-by: David Woodhouse