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
This commit is contained in:
Linus Torvalds
commit
c91d7d54ea
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@ -117,7 +117,7 @@ $(obj)/config_data.gz: .config FORCE
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$(call if_changed,gzip)
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quiet_cmd_ikconfiggz = IKCFG $@
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cmd_ikconfiggz = (echo "static const char kernel_config_data[] = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") > $@
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cmd_ikconfiggz = (echo "static const char kernel_config_data[] __used = MAGIC_START"; cat $< | scripts/bin2c; echo "MAGIC_END;") > $@
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targets += config_data.h
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$(obj)/config_data.h: $(obj)/config_data.gz FORCE
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$(call if_changed,ikconfiggz)
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@ -17,6 +17,10 @@ dump_config() {
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return
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fi
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end=`$binoffset $file $IKCFG_ED 2>/dev/null`
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[ "$?" != "0" ] && end="-1"
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if [ "$end" -eq "-1" ]; then
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return
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fi
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start=`expr $start + 8`
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size=`expr $end - $start`
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@ -55,6 +59,8 @@ dump_config "$image"
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GZHDR1="0x1f 0x8b 0x08 0x00"
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GZHDR2="0x1f 0x8b 0x08 0x08"
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ELFHDR="0x7f 0x45 0x4c 0x46"
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# vmlinux.gz: Check for a compressed images
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off=`$binoffset "$image" $GZHDR1 2>/dev/null`
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[ "$?" != "0" ] && off="-1"
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@ -69,6 +75,14 @@ elif [ "$off" -ne "-1" ]; then
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(dd ibs="$off" skip=1 count=0 && dd bs=512k) <"$image" 2>/dev/null | \
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zcat >"$TMPFILE"
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dump_config "$TMPFILE"
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# check if this is simply an ELF file
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else
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off=`$binoffset "$image" $ELFHDR 2>/dev/null`
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[ "$?" != "0" ] && off="-1"
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if [ "$off" -eq "0" ]; then
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dump_config "$image"
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fi
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fi
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echo "ERROR: Unable to extract kernel configuration information."
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@ -2,7 +2,8 @@
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# Kernel configuration targets
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# These targets are used from top-level makefile
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PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config
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PHONY += oldconfig xconfig gconfig menuconfig config silentoldconfig update-po-config \
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localmodconfig localyesconfig
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ifdef KBUILD_KCONFIG
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Kconfig := $(KBUILD_KCONFIG)
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@ -28,6 +29,35 @@ oldconfig: $(obj)/conf
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silentoldconfig: $(obj)/conf
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$< -s $(Kconfig)
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localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
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$(Q)perl $< $(Kconfig) > .tmp.config
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$(Q)if [ -f .config ]; then \
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cmp -s .tmp.config .config || \
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(mv -f .config .config.old.1; \
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mv -f .tmp.config .config; \
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$(obj)/conf -s $(Kconfig); \
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mv -f .config.old.1 .config.old) \
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else \
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mv -f .tmp.config .config; \
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$(obj)/conf -s $(Kconfig); \
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fi
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$(Q)rm -f .tmp.config
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localyesconfig: $(obj)/streamline_config.pl $(obj)/conf
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$(Q)perl $< $(Kconfig) > .tmp.config
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$(Q)sed -i s/=m/=y/ .tmp.config
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$(Q)if [ -f .config ]; then \
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cmp -s .tmp.config .config || \
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(mv -f .config .config.old.1; \
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mv -f .tmp.config .config; \
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$(obj)/conf -s $(Kconfig); \
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mv -f .config.old.1 .config.old) \
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else \
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mv -f .tmp.config .config; \
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$(obj)/conf -s $(Kconfig); \
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fi
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$(Q)rm -f .tmp.config
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# Create new linux.pot file
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# Adjust charset to UTF-8 in .po file to accept UTF-8 in Kconfig files
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# The symlink is used to repair a deficiency in arch/um
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@ -83,6 +113,8 @@ help:
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@echo ' xconfig - Update current config utilising a QT based front-end'
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@echo ' gconfig - Update current config utilising a GTK based front-end'
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@echo ' oldconfig - Update current config utilising a provided .config as base'
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@echo ' localmodconfig - Update current config disabling modules not loaded'
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@echo ' localyesconfig - Update current config converting local mods to core'
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@echo ' silentoldconfig - Same as oldconfig, but quietly, additionally update deps'
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@echo ' randconfig - New config with random answer to all options'
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@echo ' defconfig - New config with default answer to all options'
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@ -0,0 +1,366 @@
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#!/usr/bin/perl -w
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#
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# Copywrite 2005-2009 - Steven Rostedt
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# Licensed under the terms of the GNU GPL License version 2
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#
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# It's simple enough to figure out how this works.
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# If not, then you can ask me at stripconfig@goodmis.org
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#
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# What it does?
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#
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# If you have installed a Linux kernel from a distribution
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# that turns on way too many modules than you need, and
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# you only want the modules you use, then this program
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# is perfect for you.
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#
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# It gives you the ability to turn off all the modules that are
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# not loaded on your system.
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#
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# Howto:
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#
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# 1. Boot up the kernel that you want to stream line the config on.
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# 2. Change directory to the directory holding the source of the
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# kernel that you just booted.
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# 3. Copy the configuraton file to this directory as .config
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# 4. Have all your devices that you need modules for connected and
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# operational (make sure that their corresponding modules are loaded)
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# 5. Run this script redirecting the output to some other file
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# like config_strip.
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# 6. Back up your old config (if you want too).
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# 7. copy the config_strip file to .config
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# 8. Run "make oldconfig"
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#
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# Now your kernel is ready to be built with only the modules that
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# are loaded.
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#
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# Here's what I did with my Debian distribution.
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#
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# cd /usr/src/linux-2.6.10
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# cp /boot/config-2.6.10-1-686-smp .config
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# ~/bin/streamline_config > config_strip
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# mv .config config_sav
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# mv config_strip .config
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# make oldconfig
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#
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my $config = ".config";
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my $linuxpath = ".";
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my $uname = `uname -r`;
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chomp $uname;
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my @searchconfigs = (
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{
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"file" => ".config",
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"exec" => "cat",
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},
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{
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"file" => "/proc/config.gz",
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"exec" => "zcat",
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},
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{
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"file" => "/boot/config-$uname",
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"exec" => "cat",
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},
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{
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"file" => "/boot/vmlinuz-$uname",
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"exec" => "scripts/extract-ikconfig",
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"test" => "scripts/extract-ikconfig",
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},
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{
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"file" => "vmlinux",
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"exec" => "scripts/extract-ikconfig",
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"test" => "scripts/extract-ikconfig",
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},
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{
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"file" => "/lib/modules/$uname/kernel/kernel/configs.ko",
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"exec" => "scripts/extract-ikconfig",
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"test" => "scripts/extract-ikconfig",
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},
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{
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"file" => "kernel/configs.ko",
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"exec" => "scripts/extract-ikconfig",
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"test" => "scripts/extract-ikconfig",
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},
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{
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"file" => "kernel/configs.o",
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"exec" => "scripts/extract-ikconfig",
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"test" => "scripts/extract-ikconfig",
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},
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);
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sub find_config {
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foreach my $conf (@searchconfigs) {
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my $file = $conf->{"file"};
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next if ( ! -f "$file");
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if (defined($conf->{"test"})) {
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`$conf->{"test"} $conf->{"file"} 2>/dev/null`;
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next if ($?);
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}
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my $exec = $conf->{"exec"};
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print STDERR "using config: '$file'\n";
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open(CIN, "$exec $file |") || die "Failed to run $exec $file";
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return;
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}
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die "No config file found";
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}
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find_config;
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my @makefiles = `find $linuxpath -name Makefile`;
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my %depends;
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my %selects;
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my %prompts;
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my %objects;
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my $var;
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my $cont = 0;
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# Get the top level Kconfig file (passed in)
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my $kconfig = $ARGV[0];
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# prevent recursion
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my %read_kconfigs;
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sub read_kconfig {
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my ($kconfig) = @_;
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my $state = "NONE";
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my $config;
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my @kconfigs;
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open(KIN, $kconfig) || die "Can't open $kconfig";
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while (<KIN>) {
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chomp;
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# collect any Kconfig sources
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if (/^source\s*"(.*)"/) {
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$kconfigs[$#kconfigs+1] = $1;
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}
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# configs found
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if (/^\s*config\s+(\S+)\s*$/) {
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$state = "NEW";
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$config = $1;
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# collect the depends for the config
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} elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
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$state = "DEP";
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$depends{$config} = $1;
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} elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
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$depends{$config} .= " " . $1;
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# Get the configs that select this config
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} elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {
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if (defined($selects{$1})) {
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$selects{$1} .= " " . $config;
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} else {
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$selects{$1} = $config;
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}
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# configs without prompts must be selected
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} elsif ($state ne "NONE" && /^\s*tristate\s\S/) {
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# note if the config has a prompt
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$prompt{$config} = 1;
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# stop on "help"
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} elsif (/^\s*help\s*$/) {
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$state = "NONE";
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}
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}
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close(KIN);
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# read in any configs that were found.
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foreach $kconfig (@kconfigs) {
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if (!defined($read_kconfigs{$kconfig})) {
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$read_kconfigs{$kconfig} = 1;
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read_kconfig($kconfig);
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}
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}
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}
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if ($kconfig) {
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read_kconfig($kconfig);
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}
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# Read all Makefiles to map the configs to the objects
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foreach my $makefile (@makefiles) {
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chomp $makefile;
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open(MIN,$makefile) || die "Can't open $makefile";
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while (<MIN>) {
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my $objs;
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# is this a line after a line with a backslash?
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if ($cont && /(\S.*)$/) {
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$objs = $1;
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}
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$cont = 0;
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# collect objects after obj-$(CONFIG_FOO_BAR)
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if (/obj-\$\((CONFIG_[^\)]*)\)\s*[+:]?=\s*(.*)/) {
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$var = $1;
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$objs = $2;
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}
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if (defined($objs)) {
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# test if the line ends with a backslash
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if ($objs =~ m,(.*)\\$,) {
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$objs = $1;
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$cont = 1;
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}
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foreach my $obj (split /\s+/,$objs) {
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$obj =~ s/-/_/g;
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if ($obj =~ /(.*)\.o$/) {
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# Objects may bes enabled by more than one config.
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# Store configs in an array.
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my @arr;
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if (defined($objects{$1})) {
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@arr = @{$objects{$1}};
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}
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$arr[$#arr+1] = $var;
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# The objects have a hash mapping to a reference
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# of an array of configs.
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$objects{$1} = \@arr;
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}
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}
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}
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}
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close(MIN);
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}
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my %modules;
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# see what modules are loaded on this system
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open(LIN,"/sbin/lsmod|") || die "Cant lsmod";
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while (<LIN>) {
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next if (/^Module/); # Skip the first line.
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if (/^(\S+)/) {
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$modules{$1} = 1;
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}
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}
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close (LIN);
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# add to the configs hash all configs that are needed to enable
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# a loaded module.
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my %configs;
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foreach my $module (keys(%modules)) {
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if (defined($objects{$module})) {
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@arr = @{$objects{$module}};
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foreach my $conf (@arr) {
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$configs{$conf} = $module;
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}
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} else {
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# Most likely, someone has a custom (binary?) module loaded.
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print STDERR "$module config not found!!\n";
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}
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}
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my $valid = "A-Za-z_0-9";
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my $repeat = 1;
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#
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# Note, we do not care about operands (like: &&, ||, !) we want to add any
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# config that is in the depend list of another config. This script does
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# not enable configs that are not already enabled. If we come across a
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# config A that depends on !B, we can still add B to the list of depends
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# to keep on. If A was on in the original config, B would not have been
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# and B would not be turned on by this script.
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#
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sub parse_config_dep_select
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{
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my ($p) = @_;
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while ($p =~ /[$valid]/) {
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if ($p =~ /^[^$valid]*([$valid]+)/) {
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my $conf = "CONFIG_" . $1;
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$p =~ s/^[^$valid]*[$valid]+//;
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if (!defined($configs{$conf})) {
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# We must make sure that this config has its
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# dependencies met.
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$repeat = 1; # do again
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$configs{$conf} = 1;
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}
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} else {
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die "this should never happen";
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}
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}
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}
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while ($repeat) {
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$repeat = 0;
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foreach my $config (keys %configs) {
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$config =~ s/^CONFIG_//;
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||||
if (defined($depends{$config})) {
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# This config has dependencies. Make sure they are also included
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parse_config_dep_select $depends{$config};
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}
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||||
if (defined($prompt{$config}) || !defined($selects{$config})) {
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next;
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||||
}
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|
||||
# config has no prompt and must be selected.
|
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parse_config_dep_select $selects{$config};
|
||||
}
|
||||
}
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||||
|
||||
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>) {
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||||
|
||||
if (/CONFIG_IKCONFIG/) {
|
||||
if (/# CONFIG_IKCONFIG is not set/) {
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# enable IKCONFIG at least as a module
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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") {
|
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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";
|
||||
}
|
||||
}
|
||||
Reference in New Issue