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author | Changbin Du <changbin.du@gmail.com> | 2020-05-12 23:36:07 +0800 |
---|---|---|
committer | Masahiro Yamada <masahiroy@kernel.org> | 2020-05-13 10:33:54 +0900 |
commit | c027b02d89fd42ecee911c39e9098b9609a5ca0b (patch) | |
tree | 3c9776a367ea7d52496aa9f32ce161686192121f /scripts | |
parent | 09d5873e4d1f70202314b5fe40160f9b14b9d2d0 (diff) | |
download | linux-stable-c027b02d89fd42ecee911c39e9098b9609a5ca0b.tar.gz linux-stable-c027b02d89fd42ecee911c39e9098b9609a5ca0b.tar.bz2 linux-stable-c027b02d89fd42ecee911c39e9098b9609a5ca0b.zip |
streamline_config.pl: add LMC_KEEP to preserve some kconfigs
Sometimes it is useful to preserve batches of configs when making
localmodconfig. For example, I usually don't want any usb and fs
modules to be disabled. Now we can do it by:
$ make LMC_KEEP="drivers/usb:fs" localmodconfig
Signed-off-by: Changbin Du <changbin.du@gmail.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts')
-rw-r--r-- | scripts/kconfig/Makefile | 2 | ||||
-rwxr-xr-x | scripts/kconfig/streamline_config.pl | 21 |
2 files changed, 23 insertions, 0 deletions
diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile index c9d0a4a8efb3..f3355bd86aa5 100644 --- a/scripts/kconfig/Makefile +++ b/scripts/kconfig/Makefile @@ -123,7 +123,9 @@ help: @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 ' except those preserved by LMC_KEEP environment variable' @echo ' localyesconfig - Update current config converting local mods to core' + @echo ' except those preserved by LMC_KEEP environment variable' @echo ' defconfig - New config with default from ARCH supplied defconfig' @echo ' savedefconfig - Save current config as ./defconfig (minimal config)' @echo ' allnoconfig - New config where all options are answered with no' diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl index e2f8504f5a2d..19857d18d814 100755 --- a/scripts/kconfig/streamline_config.pl +++ b/scripts/kconfig/streamline_config.pl @@ -143,6 +143,7 @@ my %depends; my %selects; my %prompts; my %objects; +my %config2kfile; my $var; my $iflevel = 0; my @ifdeps; @@ -201,6 +202,7 @@ sub read_kconfig { if (/^\s*(menu)?config\s+(\S+)\s*$/) { $state = "NEW"; $config = $2; + $config2kfile{"CONFIG_$config"} = $kconfig; # Add depends for 'if' nesting for (my $i = 0; $i < $iflevel; $i++) { @@ -591,6 +593,20 @@ while ($repeat) { } my %setconfigs; +my @preserved_kconfigs = split(/:/,$ENV{LMC_KEEP}); + +sub in_preserved_kconfigs { + my $kconfig = $config2kfile{$_[0]}; + if (!defined($kconfig)) { + return 0; + } + foreach my $excl (@preserved_kconfigs) { + if($kconfig =~ /^$excl/) { + return 1; + } + } + return 0; +} # Finally, read the .config file and turn off any module enabled that # we could not find a reason to keep enabled. @@ -644,6 +660,11 @@ foreach my $line (@config_file) { } if (/^(CONFIG.*)=(m|y)/) { + if (in_preserved_kconfigs($1)) { + dprint "Preserve config $1"; + print; + next; + } if (defined($configs{$1})) { if ($localyesconfig) { $setconfigs{$1} = 'y'; |