linux-toradex.git/scripts/kconfig/conf.c, branch v2.6.32.41

kconfig: Avoid buffer underrun in choice input

2011-05-09T22:54:49+00:00

commit 3ba41621156681afcdbcd624e3191cbc65eb94f4 upstream.

Commit 40aee729b350 ('kconfig: fix default value for choice input')
fixed some cases where kconfig would select the wrong option from a
choice with a single valid option and thus enter an infinite loop.

However, this broke the test for user input of the form 'N?', because
when kconfig selects the single valid option the input is zero-length
and the test will read the byte before the input buffer.  If this
happens to contain '?' (as it will in a mips build on Debian unstable
today) then kconfig again enters an infinite loop.

Signed-off-by: Ben Hutchings 
Signed-off-by: Linus Torvalds 
Signed-off-by: Greg Kroah-Hartman

kbuild: add static to prototypes

2009-09-20T10:27:44+00:00

Warnings found via gcc -Wmissing-prototypes.

Signed-off-by: Trevor Keith 
Acked-by: WANG Cong 
Signed-off-by: Andrew Morton 
Signed-off-by: Sam Ravnborg

kconfig: make use of menu_get_ext_help in "make config"

2009-09-20T10:27:42+00:00

Signed-off-by: Cheng Renquan 
Cc: Roman Zippel 
Signed-off-by: Sam Ravnborg

kconfig: do not hardcode ".config" filename

2009-06-09T20:37:51+00:00

Rather than hardcoding ".config" use conf_get_configname(), which also
respects the environment variable KCONFIG_CONFIG.

This fixes "make silentoldconfig" when KCONFIG_CONFIG is used and also
suggests the given filename for "Load" and "Save as" in qconf.

Signed-off-by: Markus Heidelberg 
Signed-off-by: Sam Ravnborg

kconfig: improve seed in randconfig

2009-03-15T22:02:07+00:00

'make randconfig' uses glibc's rand function, and the seed of
that PRNG is set via:

			srand(time(NULL));

But 'time()' only increases once every second - freezing the
randconfig result within a single second.

My Nehalem testbox does randconfig much faster than 1 second
 and i have a few scripts that do 'randconfig until condition X'
loops.

Those scripts currently waste a lot of CPU time due to randconfig
changing its seed only once per second currently.

Change the seed to be micrseconds based. (I checked the statistical
spread of the seed - the now.tv_sec*now.tv_usec multiplication
there further improves it.)

Signed-off-by: Ingo Molnar 
Cc: Roman Zippel 
[sam: fix for systems where usec is zero - noticed by Geert Uytterhoeven]
Signed-off-by: Sam Ravnborg

kconfig: fix silentoldconfig

2008-09-29T15:03:01+00:00

Recent changes to oldconfig have mixed up the silentoldconfig handling,
so this fixes that by clearly separating that special mode, e.g.
KCONFIG_NOSILENTUPDATE is only relevant here, the .config is written as
needed.

This will also properly close Bug 11230.

Signed-off-by: Roman Zippel 
Signed-off-by: Linus Torvalds

kconfig: always write out .config

2008-08-04T20:18:07+00:00

Always write out .config also in the case where config
did not change.
This fixes: http://bugzilla.kernel.org/show_bug.cgi?id=11230

Signed-off-by: Sam Ravnborg 
Cc: Josh Boyer 
Cc: Adrian Bunk

kconfig: make defconfig is no longer chatty

2008-07-25T20:12:51+00:00

make defconfig generated a lot of output
then noone actually read.
Use conf_set_all_new_symbols() to generate the default
configuration and avoid the chatty output.

A typical run now looks like this:
$ make  defconfig
*** Default configuration is based on 'i386_defconfig'
arch/x86/configs/i386_defconfig:13:warning: trying to assign nonexistent symbol SEMAPHORE_SLEEPERS
arch/x86/configs/i386_defconfig:176:warning: trying to assign nonexistent symbol PREEMPT_BKL
...
arch/x86/configs/i386_defconfig:1386:warning: trying to assign nonexistent symbol INSTRUMENTATION
$

As an added benefit we now clearly see the warnings generated
in the start of the process.

Signed-off-by: Sam Ravnborg 
Cc: Roman Zippel

kconfig: make oldconfig is now less chatty

2008-07-25T20:12:50+00:00

Previously when running "make oldconfig" we saw all the propmt lines
from kconfig and noone actully read this.

With this patch the user will only see output if there is new symbols.
This will be seen as "make oldconfig" runs which does not generate any output.

A typical run now looks like this:

$ make oldconfig
scripts/kconfig/conf -o arch/x86/Kconfig
$

If a new symbol is found then we restart the config process like this:
$ make oldconfig
scripts/kconfig/conf -o arch/x86/Kconfig
*
* Restart config...
*
*
* General setup
*
Prompt for development and/or incomplete code/drivers (EXPERIMENTAL) [Y/n/?] y
Local version - append to kernel release (LOCALVERSION) []
...

The bahaviour is similar to what we know when running the implicit
oldconfig target "make silentoldconfig".
"make silentoldconfig" are run as part of the kernel build process
if the configuration has changed.

Signed-off-by: Sam Ravnborg 
Cc: Roman Zippel

kconfig: speed up all*config + randconfig

2008-07-25T20:12:49+00:00

Drop the chatty mode when we generate the all*config, randconfig
configurations.
Ths speeds up the process considerably and noone looked
at the output anyway.
This patch uses the conf_set_all_new_symbols() function
just added to kconfig.

Signed-off-by: Sam Ravnborg 
Cc: Roman Zippel