zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/scripts/kconfig/streamline_config.pl b/ap/os/linux/linux-3.4.x/scripts/kconfig/streamline_config.pl
new file mode 100644
index 0000000..3346f42
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/scripts/kconfig/streamline_config.pl
@@ -0,0 +1,497 @@
+#!/usr/bin/perl -w
+#
+# Copyright 2005-2009 - Steven Rostedt
+# Licensed under the terms of the GNU GPL License version 2
+#
+# It's simple enough to figure out how this works.
+# If not, then you can ask me at stripconfig@goodmis.org
+#
+# What it does?
+#
+# If you have installed a Linux kernel from a distribution
+# that turns on way too many modules than you need, and
+# you only want the modules you use, then this program
+# is perfect for you.
+#
+# It gives you the ability to turn off all the modules that are
+# not loaded on your system.
+#
+# Howto:
+#
+# 1. Boot up the kernel that you want to stream line the config on.
+# 2. Change directory to the directory holding the source of the
+# kernel that you just booted.
+# 3. Copy the configuraton file to this directory as .config
+# 4. Have all your devices that you need modules for connected and
+# operational (make sure that their corresponding modules are loaded)
+# 5. Run this script redirecting the output to some other file
+# like config_strip.
+# 6. Back up your old config (if you want too).
+# 7. copy the config_strip file to .config
+# 8. Run "make oldconfig"
+#
+# Now your kernel is ready to be built with only the modules that
+# are loaded.
+#
+# Here's what I did with my Debian distribution.
+#
+# cd /usr/src/linux-2.6.10
+# cp /boot/config-2.6.10-1-686-smp .config
+# ~/bin/streamline_config > config_strip
+# mv .config config_sav
+# mv config_strip .config
+# make oldconfig
+#
+use strict;
+use Getopt::Long;
+
+my $config = ".config";
+
+my $uname = `uname -r`;
+chomp $uname;
+
+my @searchconfigs = (
+ {
+ "file" => ".config",
+ "exec" => "cat",
+ },
+ {
+ "file" => "/proc/config.gz",
+ "exec" => "zcat",
+ },
+ {
+ "file" => "/boot/config-$uname",
+ "exec" => "cat",
+ },
+ {
+ "file" => "/boot/vmlinuz-$uname",
+ "exec" => "scripts/extract-ikconfig",
+ "test" => "scripts/extract-ikconfig",
+ },
+ {
+ "file" => "vmlinux",
+ "exec" => "scripts/extract-ikconfig",
+ "test" => "scripts/extract-ikconfig",
+ },
+ {
+ "file" => "/lib/modules/$uname/kernel/kernel/configs.ko",
+ "exec" => "scripts/extract-ikconfig",
+ "test" => "scripts/extract-ikconfig",
+ },
+ {
+ "file" => "kernel/configs.ko",
+ "exec" => "scripts/extract-ikconfig",
+ "test" => "scripts/extract-ikconfig",
+ },
+ {
+ "file" => "kernel/configs.o",
+ "exec" => "scripts/extract-ikconfig",
+ "test" => "scripts/extract-ikconfig",
+ },
+);
+
+sub find_config {
+ foreach my $conf (@searchconfigs) {
+ my $file = $conf->{"file"};
+
+ next if ( ! -f "$file");
+
+ if (defined($conf->{"test"})) {
+ `$conf->{"test"} $conf->{"file"} 2>/dev/null`;
+ next if ($?);
+ }
+
+ my $exec = $conf->{"exec"};
+
+ print STDERR "using config: '$file'\n";
+
+ open(CIN, "$exec $file |") || die "Failed to run $exec $file";
+ return;
+ }
+ die "No config file found";
+}
+
+find_config;
+
+# Parse options
+my $localmodconfig = 0;
+my $localyesconfig = 0;
+
+GetOptions("localmodconfig" => \$localmodconfig,
+ "localyesconfig" => \$localyesconfig);
+
+# Get the build source and top level Kconfig file (passed in)
+my $ksource = $ARGV[0];
+my $kconfig = $ARGV[1];
+my $lsmod_file = $ENV{'LSMOD'};
+
+my @makefiles = `find $ksource -name Makefile 2>/dev/null`;
+chomp @makefiles;
+
+my %depends;
+my %selects;
+my %prompts;
+my %objects;
+my $var;
+my $iflevel = 0;
+my @ifdeps;
+
+# prevent recursion
+my %read_kconfigs;
+
+sub read_kconfig {
+ my ($kconfig) = @_;
+
+ my $state = "NONE";
+ my $config;
+ my @kconfigs;
+
+ my $cont = 0;
+ my $line;
+
+ my $source = "$ksource/$kconfig";
+ my $last_source = "";
+
+ # Check for any environment variables used
+ while ($source =~ /\$(\w+)/ && $last_source ne $source) {
+ my $env = $1;
+ $last_source = $source;
+ $source =~ s/\$$env/$ENV{$env}/;
+ }
+
+ open(KIN, "$source") || die "Can't open $kconfig";
+ while (<KIN>) {
+ chomp;
+
+ # Make sure that lines ending with \ continue
+ if ($cont) {
+ $_ = $line . " " . $_;
+ }
+
+ if (s/\\$//) {
+ $cont = 1;
+ $line = $_;
+ next;
+ }
+
+ $cont = 0;
+
+ # collect any Kconfig sources
+ if (/^source\s*"(.*)"/) {
+ $kconfigs[$#kconfigs+1] = $1;
+ }
+
+ # configs found
+ if (/^\s*(menu)?config\s+(\S+)\s*$/) {
+ $state = "NEW";
+ $config = $2;
+
+ for (my $i = 0; $i < $iflevel; $i++) {
+ if ($i) {
+ $depends{$config} .= " " . $ifdeps[$i];
+ } else {
+ $depends{$config} = $ifdeps[$i];
+ }
+ $state = "DEP";
+ }
+
+ # collect the depends for the config
+ } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
+ $state = "DEP";
+ $depends{$config} = $1;
+ } elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
+ $depends{$config} .= " " . $1;
+
+ # Get the configs that select this config
+ } elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
+ if (defined($selects{$1})) {
+ $selects{$1} .= " " . $config;
+ } else {
+ $selects{$1} = $config;
+ }
+
+ # configs without prompts must be selected
+ } elsif ($state ne "NONE" && /^\s*tristate\s\S/) {
+ # note if the config has a prompt
+ $prompts{$config} = 1;
+
+ # Check for if statements
+ } elsif (/^if\s+(.*\S)\s*$/) {
+ my $deps = $1;
+ # remove beginning and ending non text
+ $deps =~ s/^[^a-zA-Z0-9_]*//;
+ $deps =~ s/[^a-zA-Z0-9_]*$//;
+
+ my @deps = split /[^a-zA-Z0-9_]+/, $deps;
+
+ $ifdeps[$iflevel++] = join ':', @deps;
+
+ } elsif (/^endif/) {
+
+ $iflevel-- if ($iflevel);
+
+ # stop on "help"
+ } elsif (/^\s*help\s*$/) {
+ $state = "NONE";
+ }
+ }
+ close(KIN);
+
+ # read in any configs that were found.
+ foreach $kconfig (@kconfigs) {
+ if (!defined($read_kconfigs{$kconfig})) {
+ $read_kconfigs{$kconfig} = 1;
+ read_kconfig($kconfig);
+ }
+ }
+}
+
+if ($kconfig) {
+ read_kconfig($kconfig);
+}
+
+sub convert_vars {
+ my ($line, %vars) = @_;
+
+ my $process = "";
+
+ while ($line =~ s/^(.*?)(\$\((.*?)\))//) {
+ my $start = $1;
+ my $variable = $2;
+ my $var = $3;
+
+ if (defined($vars{$var})) {
+ $process .= $start . $vars{$var};
+ } else {
+ $process .= $start . $variable;
+ }
+ }
+
+ $process .= $line;
+
+ return $process;
+}
+
+# Read all Makefiles to map the configs to the objects
+foreach my $makefile (@makefiles) {
+
+ my $line = "";
+ my %make_vars;
+
+ open(MIN,$makefile) || die "Can't open $makefile";
+ while (<MIN>) {
+ # if this line ends with a backslash, continue
+ chomp;
+ if (/^(.*)\\$/) {
+ $line .= $1;
+ next;
+ }
+
+ $line .= $_;
+ $_ = $line;
+ $line = "";
+
+ my $objs;
+
+ $_ = convert_vars($_, %make_vars);
+
+ # collect objects after obj-$(CONFIG_FOO_BAR)
+ if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
+ $var = $1;
+ $objs = $2;
+
+ # check if variables are set
+ } elsif (/^\s*(\S+)\s*[:]?=\s*(.*\S)/) {
+ $make_vars{$1} = $2;
+ }
+ if (defined($objs)) {
+ foreach my $obj (split /\s+/,$objs) {
+ $obj =~ s/-/_/g;
+ if ($obj =~ /(.*)\.o$/) {
+ # Objects may be enabled by more than one config.
+ # Store configs in an array.
+ my @arr;
+
+ if (defined($objects{$1})) {
+ @arr = @{$objects{$1}};
+ }
+
+ $arr[$#arr+1] = $var;
+
+ # The objects have a hash mapping to a reference
+ # of an array of configs.
+ $objects{$1} = \@arr;
+ }
+ }
+ }
+ }
+ close(MIN);
+}
+
+my %modules;
+
+if (defined($lsmod_file)) {
+ if ( ! -f $lsmod_file) {
+ if ( -f $ENV{'objtree'}."/".$lsmod_file) {
+ $lsmod_file = $ENV{'objtree'}."/".$lsmod_file;
+ } else {
+ die "$lsmod_file not found";
+ }
+ }
+ if ( -x $lsmod_file) {
+ # the file is executable, run it
+ open(LIN, "$lsmod_file|");
+ } else {
+ # Just read the contents
+ open(LIN, "$lsmod_file");
+ }
+} else {
+
+ # see what modules are loaded on this system
+ my $lsmod;
+
+ foreach my $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) {
+ if ( -x "$dir/lsmod" ) {
+ $lsmod = "$dir/lsmod";
+ last;
+ }
+}
+ if (!defined($lsmod)) {
+ # try just the path
+ $lsmod = "lsmod";
+ }
+
+ open(LIN,"$lsmod|") || die "Can not call lsmod with $lsmod";
+}
+
+while (<LIN>) {
+ next if (/^Module/); # Skip the first line.
+ if (/^(\S+)/) {
+ $modules{$1} = 1;
+ }
+}
+close (LIN);
+
+# add to the configs hash all configs that are needed to enable
+# a loaded module.
+my %configs;
+foreach my $module (keys(%modules)) {
+ if (defined($objects{$module})) {
+ my @arr = @{$objects{$module}};
+ foreach my $conf (@arr) {
+ $configs{$conf} = $module;
+ }
+ } else {
+ # Most likely, someone has a custom (binary?) module loaded.
+ print STDERR "$module config not found!!\n";
+ }
+}
+
+my $valid = "A-Za-z_0-9";
+my $repeat = 1;
+
+#
+# Note, we do not care about operands (like: &&, ||, !) we want to add any
+# config that is in the depend list of another config. This script does
+# not enable configs that are not already enabled. If we come across a
+# config A that depends on !B, we can still add B to the list of depends
+# to keep on. If A was on in the original config, B would not have been
+# and B would not be turned on by this script.
+#
+sub parse_config_dep_select
+{
+ my ($p) = @_;
+
+ while ($p =~ /[$valid]/) {
+
+ if ($p =~ /^[^$valid]*([$valid]+)/) {
+ my $conf = "CONFIG_" . $1;
+
+ $p =~ s/^[^$valid]*[$valid]+//;
+
+ if (!defined($configs{$conf})) {
+ # We must make sure that this config has its
+ # dependencies met.
+ $repeat = 1; # do again
+ $configs{$conf} = 1;
+ }
+ } else {
+ die "this should never happen";
+ }
+ }
+}
+
+while ($repeat) {
+ $repeat = 0;
+
+ foreach my $config (keys %configs) {
+ $config =~ s/^CONFIG_//;
+
+ if (defined($depends{$config})) {
+ # This config has dependencies. Make sure they are also included
+ parse_config_dep_select $depends{$config};
+ }
+
+ if (defined($prompts{$config}) || !defined($selects{$config})) {
+ next;
+ }
+
+ # config has no prompt and must be selected.
+ parse_config_dep_select $selects{$config};
+ }
+}
+
+my %setconfigs;
+
+# Finally, read the .config file and turn off any module enabled that
+# we could not find a reason to keep enabled.
+while(<CIN>) {
+
+ if (/CONFIG_IKCONFIG/) {
+ if (/# CONFIG_IKCONFIG is not set/) {
+ # enable IKCONFIG at least as a module
+ print "CONFIG_IKCONFIG=m\n";
+ # don't ask about PROC
+ print "# CONFIG_IKCONFIG_PROC is not set\n";
+ } else {
+ print;
+ }
+ next;
+ }
+
+ if (/^(CONFIG.*)=(m|y)/) {
+ if (defined($configs{$1})) {
+ if ($localyesconfig) {
+ $setconfigs{$1} = 'y';
+ print "$1=y\n";
+ next;
+ } else {
+ $setconfigs{$1} = $2;
+ }
+ } elsif ($2 eq "m") {
+ print "# $1 is not set\n";
+ next;
+ }
+ }
+ print;
+}
+close(CIN);
+
+# Integrity check, make sure all modules that we want enabled do
+# indeed have their configs set.
+loop:
+foreach my $module (keys(%modules)) {
+ if (defined($objects{$module})) {
+ my @arr = @{$objects{$module}};
+ foreach my $conf (@arr) {
+ if (defined($setconfigs{$conf})) {
+ next loop;
+ }
+ }
+ print STDERR "module $module did not have configs";
+ foreach my $conf (@arr) {
+ print STDERR " " , $conf;
+ }
+ print STDERR "\n";
+ }
+}