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authorLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 19:59:37 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-09-14 19:59:37 -0700
commitc91d7d54ea9e75ec18c733969ba16dd7ab94fc99 (patch)
tree5b93c6931adf9908f9f207eaa7a0f91d8207ad08 /scripts
parent133309a89e7430f907ebe85e78906ee12c311727 (diff)
parent48586218b6515b9bd70694e3cd8c901a6a6ee69c (diff)
downloadlinux-linaro-stable-c91d7d54ea9e75ec18c733969ba16dd7ab94fc99.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-kconfig: kconfig: add missing dependency of conf to localyesconfig kconfig: test if a .config already exists kconfig: make local .config default for streamline_config kconfig: test for /boot/config-uname after /proc/config.gz in localconfig kconfig: unset IKCONFIG_PROC and clean up nesting kconfig: search for a config to base the local(mod|yes)config on kconfig: keep config.gz around even if CONFIG_IKCONFIG_PROC is not set kconfig: have extract-ikconfig read ELF files kconfig: add check if end exists in extract-ikconfig kconfig: enable CONFIG_IKCONFIG from streamline_config.pl kconfig: do not warn about modules built in kconfig: streamline_config.pl do not stop with no depends kconfig: add make localyesconfig option kconfig: make localmodconfig to run streamline_config.pl kconfig: add streamline_config.pl to scripts
Diffstat (limited to 'scripts')
-rwxr-xr-xscripts/extract-ikconfig14
-rw-r--r--scripts/kconfig/Makefile34
-rw-r--r--scripts/kconfig/streamline_config.pl366
3 files changed, 413 insertions, 1 deletions
diff --git a/scripts/extract-ikconfig b/scripts/extract-ikconfig
index 72997c353cb3..de233ff43c1c 100755
--- a/scripts/extract-ikconfig
+++ b/scripts/extract-ikconfig
@@ -17,6 +17,10 @@ dump_config() {
return
fi
end=`$binoffset $file $IKCFG_ED 2>/dev/null`
+ [ "$?" != "0" ] && end="-1"
+ if [ "$end" -eq "-1" ]; then
+ return
+ fi
start=`expr $start + 8`
size=`expr $end - $start`
@@ -55,6 +59,8 @@ dump_config "$image"
GZHDR1="0x1f 0x8b 0x08 0x00"
GZHDR2="0x1f 0x8b 0x08 0x08"
+ELFHDR="0x7f 0x45 0x4c 0x46"
+
# vmlinux.gz: Check for a compressed images
off=`$binoffset "$image" $GZHDR1 2>/dev/null`
[ "$?" != "0" ] && off="-1"
@@ -69,6 +75,14 @@ elif [ "$off" -ne "-1" ]; then
(dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null | \
zcat >"$TMPFILE"
dump_config "$TMPFILE"
+
+# check if this is simply an ELF file
+else
+ off=`$binoffset "$image" $ELFHDR 2>/dev/null`
+ [ "$?" != "0" ] && off="-1"
+ if [ "$off" -eq "0" ]; then
+ dump_config "$image"
+ fi
fi
echo "ERROR: Unable to extract kernel configuration information."
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 5ddf8becd7a2..6d69c7ccdcc7 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -2,7 +2,8 @@
# Kernel configuration targets
# These targets are used from top-level makefile
-PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config
+PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config \
+ localmodconfig localyesconfig
ifdef KBUILD_KCONFIG
Kconfig := $(KBUILD_KCONFIG)
@@ -28,6 +29,35 @@ oldconfig: $(obj)/conf
silentoldconfig: $(obj)/conf
$< -s $(Kconfig)
+localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
+ $(Q)perl $< $(Kconfig) > .tmp.config
+ $(Q)if [ -f .config ]; then \
+ cmp -s .tmp.config .config || \
+ (mv -f .config .config.old.1; \
+ mv -f .tmp.config .config; \
+ $(obj)/conf -s $(Kconfig); \
+ mv -f .config.old.1 .config.old) \
+ else \
+ mv -f .tmp.config .config; \
+ $(obj)/conf -s $(Kconfig); \
+ fi
+ $(Q)rm -f .tmp.config
+
+localyesconfig: $(obj)/streamline_config.pl $(obj)/conf
+ $(Q)perl $< $(Kconfig) > .tmp.config
+ $(Q)sed -i s/=m/=y/ .tmp.config
+ $(Q)if [ -f .config ]; then \
+ cmp -s .tmp.config .config || \
+ (mv -f .config .config.old.1; \
+ mv -f .tmp.config .config; \
+ $(obj)/conf -s $(Kconfig); \
+ mv -f .config.old.1 .config.old) \
+ else \
+ mv -f .tmp.config .config; \
+ $(obj)/conf -s $(Kconfig); \
+ fi
+ $(Q)rm -f .tmp.config
+
# Create new linux.pot file
# Adjust charset to UTF-8 in .po file to accept UTF-8 in Kconfig files
# The symlink is used to repair a deficiency in arch/um
@@ -83,6 +113,8 @@ help:
@echo ' xconfig - Update current config utilising a QT based front-end'
@echo ' gconfig - Update current config utilising a GTK based front-end'
@echo ' oldconfig - Update current config utilising a provided .config as base'
+ @echo ' localmodconfig - Update current config disabling modules not loaded'
+ @echo ' localyesconfig - Update current config converting local mods to core'
@echo ' silentoldconfig - Same as oldconfig, but quietly, additionally update deps'
@echo ' randconfig - New config with random answer to all options'
@echo ' defconfig - New config with default answer to all options'
diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
new file mode 100644
index 000000000000..95984db8e1e0
--- /dev/null
+++ b/scripts/kconfig/streamline_config.pl
@@ -0,0 +1,366 @@
+#!/usr/bin/perl -w
+#
+# Copywrite 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
+#
+my $config = ".config";
+my $linuxpath = ".";
+
+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;
+
+my @makefiles = `find $linuxpath -name Makefile`;
+my %depends;
+my %selects;
+my %prompts;
+my %objects;
+my $var;
+my $cont = 0;
+
+# Get the top level Kconfig file (passed in)
+my $kconfig = $ARGV[0];
+
+# prevent recursion
+my %read_kconfigs;
+
+sub read_kconfig {
+ my ($kconfig) = @_;
+
+ my $state = "NONE";
+ my $config;
+ my @kconfigs;
+
+ open(KIN, $kconfig) || die "Can't open $kconfig";
+ while (<KIN>) {
+ chomp;
+
+ # collect any Kconfig sources
+ if (/^source\s*"(.*)"/) {
+ $kconfigs[$#kconfigs+1] = $1;
+ }
+
+ # configs found
+ if (/^\s*config\s+(\S+)\s*$/) {
+ $state = "NEW";
+ $config = $1;
+
+ # collect the depends for the config
+ } elsif ($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
+ $prompt{$config} = 1;
+
+ # 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);
+}
+
+# Read all Makefiles to map the configs to the objects
+foreach my $makefile (@makefiles) {
+ chomp $makefile;
+
+ open(MIN,$makefile) || die "Can't open $makefile";
+ while (<MIN>) {
+ my $objs;
+
+ # is this a line after a line with a backslash?
+ if ($cont && /(\S.*)$/) {
+ $objs = $1;
+ }
+ $cont = 0;
+
+ # collect objects after obj-$(CONFIG_FOO_BAR)
+ if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
+ $var = $1;
+ $objs = $2;
+ }
+ if (defined($objs)) {
+ # test if the line ends with a backslash
+ if ($objs =~ m,(.*)\\$,) {
+ $objs = $1;
+ $cont = 1;
+ }
+
+ foreach my $obj (split /\s+/,$objs) {
+ $obj =~ s/-/_/g;
+ if ($obj =~ /(.*)\.o$/) {
+ # Objects may bes enabled by more than one config.
+ # Store configs in an array.
+ my @arr;
+
+ if (defined($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;
+
+# see what modules are loaded on this system
+open(LIN,"/sbin/lsmod|") || die "Cant 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{$module})) {
+ @arr = @{$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($prompt{$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})) {
+ $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";
+ }
+}