OK, the copyright allows you to write a copy, still I think the lawyers
prefer the correct spelling.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
LKML-Reference: <1295899921-11333-1-git-send-email-u.kleine-koenig@pengutronix.de>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Some menuconfigs in the Kconfig files have prompts and dependencies.
Currently, streamline_config misses these, and this can cause
streamline_config to keep modules enabled that should not be, and
even worse, not enable those that should.

This patch makes streamline_config process menuconfigs just like it
would process a config.
Reported-by: Nmember graysky <graysky@archlinux.us>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

I noticed that some Kconfig files have multi line dependencies
that continue with a backslash. Those dependencies on the next
line will be missed by streamline_config.

For example:

config CS89x0
	tristate "CS89x0 support"
	depends on NET_ETHERNET && (ISA || EISA || MACH_IXDP2351 \
		|| ARCH_IXDP2X01 || MACH_MX31ADS)

The "|| ARCH_IXDP2X01 || MACH_MX31ADS)" will not be processed.

This patch adds code to handle this case.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

On Fri, Aug 17, 2010 at 01:43PM +0800, Américo Wang wrote:
> Acked-by: WANG Cong <xiyou.wangcong@gmail.com>
>
> BTW, I think we should add "use strict;" too.

Then I added "use strict;" to streamline_config.pl, I saw another
warning.

> Global symbol "$dir" requires explicit package name at
scripts/kconfig/streamline_config.pl line 286.
> Global symbol "$dir" requires explicit package name at
scripts/kconfig/streamline_config.pl line 287.
> Global symbol "$dir" requires explicit package name at
scripts/kconfig/streamline_config.pl line 288.

Then I added "my $dir;" to line 285.

Cc: Américo Wang <xiyou.wangcong@gmail.com>
Cc: Toralf Foerster <toralf.foerster@gmx.de>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: NHiromu Yakura <hiromu1996@gmail.com>
LKML-Reference: <1282042158.7160.9.camel@hiromu-Macbook>

[ changed to just add my in front of $dir instead of new line ]
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

When I added "use strict;" to streamline_config.pl, I saw the following
warnings:

> Global symbol "%prompt" requires explicit package name at
scripts/kconfig/streamline_config.pl line 183.
> Global symbol "%prompt" requires explicit package name at
scripts/kconfig/streamline_config.pl line 368.

The declaration of %prompt was incorrect, and should have been %prompts.

Cc: Toralf Foerster <toralf.foerster@gmx.de>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: NHiromu Yakura <hiromu1996@gmail.com>
LKML-Reference: <1281845597.11566.5.camel@camp10-laptop>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The commit 838a2e55
 kbuild: migrate all arch to the kconfig mainmenu upgrade

Broke make localmodconfig. The reason was that it added a
environment variable to the kconfig source, which the
streamline_config.pl could not handle.

This patch changes streamline_config.pl to handle kconfig sources
using environment variables in their names.

Cc: Arnaud Lacombe <lacombar@gmail.com>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Michal Marek <mmarek@suse.cz>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Finding the list of Makefiles in streamline-config should not report errors.

Also move the "chomp" to the @makefiles array instead of doing it in the
for loop. This is more efficient, and does not make it any less readable
by C programmers.
Signed-off-by: NToralf Foerster <toralf.foerster@gmx.de>
LKML-Reference: <201005262022.02928.toralf.foerster@gmx.de>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Signed-off-by: NToralf Foerster <toralf.foerster@gmx.de>
LKML-Reference: <201005281025.52753.toralf.foerster@gmx.de>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Proper perl requires that local variables should be declared with 'my',
otherwise this may produce errors.
Signed-off-by: NToralf Foerster <toralf.foerster@gmx.de>
LKML-Reference: <201005281025.00358.toralf.foerster@gmx.de>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Doing the following:

	make LSMOD=file localmodconfig

Will make the streamline-config code use the given file instead of
lsmod. If the file is an executable, it will execute it, otherwise
it will read it as text.

	make LSMOD=/my/local/path/lsmod localmodconfig

The above will execute the lsmod in /my/local/path instead of the
lsmods that may be located elsewhere.

	make LSMOD=embedded_board_lsmod localmodconfig

The above will read the "embedded_board_lsmod" as a text file. This
is useful if you are doing a cross compile and need to run the
config against modules that exist on an embedded device.

Note, if the LSMOD= file does is not a path, it will add the
path to the object directory. That is, the above example will look
for "embedded_board_lsmod" in the directory that the binary will
be built in (the O=dir directory).
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

 On branch config/linus

Distributions now have lsmod in /bin instead of /sbin. But to handle
both cases, we look for it in /sbin /bin /usr/bin and /usr/sbin.
If lsmod is not found in any of those paths, it defaults to use
just lsmod and hopes that it lies in the path of the user.
Tested-by: NXavier Chantry <shiningxc@gmail.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The streamline_config.pl misses the if conditions for checking
dependencies. For Kconfigs with the following construct:

 if MEDIA_SUPPORT

 config VIDEO_DEV

 [...]

If VIDEO_DEV was enabled, the script will miss the fact that MEDIA_SUPPORT
is also needed.

This patch changes streamline_config.pl to include if conditions into
the dependencies of configs.
Reported-by: NAnton Blanchard <anton@sambo.org>
Tested-by: NAnton Blanchard <anton@sambo.org>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

When the output directory is something other than the kernel source,
the streamline_config script gets confused. This patch passes in the
source directory to the script so that it can find the proper files.
Reported-by: NPeter Zijlstra <peterz@infradead.org>
Tested-by: NPeter Zijlstra <peterz@infradead.org>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

As Andi Kleen pointed out, most people would expect that the local .config
file to be based for a streamline config. This patch changes the order
of searching for a config file to consider the .config in the local
directory first.
Reported-by: NAndi Kleen <andi@firstfloor.org>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Many distros put their config in /boot/config-`uname -r`, add a check
for that right after /proc/config.gz
Reported-by: NAlan Jenkins <sourcejedi.lkml@googlemail.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Due to cut and paste error IKCONFIG was both set and cleared.
It was suppose to be IKCONFIG_PROC to be cleared.

Also cleaned up if nesting.
Reported-by: NAlan Jenkins <sourcejedi.lkml@googlemail.com>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Instead of using the .config in the local directory. This patch
changes streamline_config.pl to search various locations for a config.

Here's the list and order of search:

  /proc/config.gz
  /boot/vmlinuz-`uname -r`
  vmlinux  # local to the directory
  /lib/modules/`uname -r`/kernel/kernel/configs.ko
  kernel/configs.ko
  kernel/configs.o
  .config

Once it finds a file that contains a config (it checks if the binary
objects have configs first) it then uses it to create the .config
with minimum modules needed.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

Ingo Molnar suggested that the streamline_config.pl should enable
CONFIG_IKCONFIG to keep the current config in the kernel.
Then we can use scripts/extract-ikconfig to find the current
modules.

This patch changes streamline_config.pl to check if CONFIG_IKCONFIG
is not set, and if it is not, it enables it to be a module.

[ Impact: make current config options easier to find ]
Reported-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

The streamline_config.pl finds all the configs that are needed to
compile the currently loaded modules. After it creates the .config
file, it tests to make sure all the configs that are needed were
set.

It only looks at the configs that are modules, it does not look
at the builtin configs. This causes unnecessary warnings about modules
not being covered.
Reported-by: NIngo Molnar <mingo@elte.hu>
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

If a config does not have a prompt, it must be selected.
streamline_config.pl keeps track of all configs that select other configs.
If a config that does not have a prompt needs to be set to enable a
current module, it will include all configs that select it.
Note, streamline_config.pl does not enable modules that are not already
enabled. It only keeps enabled those that were enabled and might be
needed to compile the current modules.

The code to find the selects of a config is after the code that
adds the depends. But if a config needed selects but had no dependencies,
it would not be set. Because the code would stop before getting to
the select.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>

streamline_config.pl is a very powerful tool. For those that install
a kernel to a new box using the config file from the distribution know that
it can take forever to compile the kernel.

Making a custom config file that will still boot your box, but bring
down the compile time of the kernel can be quit painful, and to ask
someone that reported a bug to do this can be a large burdon since that
person may not even know how to build a kernel.

This script will perform "lsmod" to find all the modules loaded on the
current running system. It will read all the Makefiles to map which
CONFIG enables a module. It will read the Kconfig files to find the
dependencies and selects that may be needed to support a CONFIG.
Finally, it reads the .config file and removes any module "=m" that is
not needed to enable the currently loaded modules. The output goes to
standard out.

Here's a way to run the script. From the Linux directory that holds
a distribution .config.

 $ scripts/kconfig/streamline_config.pl arch/x86/Kconfig > config-sl
 $ mv .config config-save
 $ mv config-sl .config
 $ make oldconfig

Now you have a .config that will still build all your modules, but also
take much less time to build the kernel.
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>