localmodconfig: Read in orig config file to avoid extra processing

[cascardo/linux.git] / scripts / kconfig / streamline_config.pl

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 5c1ce87..ab4985f 100644 (file)
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -113,6 +113,10 @@ sub find_config {
 
 find_config;
 
+# Read in the entire config file into config_file
+my @config_file = <CIN>;
+close CIN;
+
 # Parse options
 my $localmodconfig = 0;
 my $localyesconfig = 0;
@@ -392,7 +396,20 @@ foreach my $module (keys(%modules)) {
     }
 }
 
+# Read the current config, and see what is enabled. We want to
+# ignore configs that we would not enable anyway.
+
+my %orig_configs;
 my $valid = "A-Za-z_0-9";
+
+foreach my $line (@config_file) {
+    $_ = $line;
+
+    if (/(CONFIG_[$valid]*)=(m|y)/) {
+       $orig_configs{$1} = $2;
+    }
+}
+
 my $repeat = 1;
 
 #
@@ -414,6 +431,11 @@ sub parse_config_dep_select
 
            $p =~ s/^[^$valid]*[$valid]+//;
 
+           # We only need to process if the depend config is a module
+           if (!defined($orig_configs{$conf}) || !$orig_configs{conf} eq "m") {
+               next;
+           }
+
            if (!defined($configs{$conf})) {
                # We must make sure that this config has its
                # dependencies met.
@@ -450,7 +472,8 @@ 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>) {
+foreach my $line (@config_file) {
+    $_ = $line;
 
     if (/CONFIG_IKCONFIG/) {
        if (/# CONFIG_IKCONFIG is not set/) {
@@ -478,7 +501,6 @@ while(<CIN>) {
     }
     print;
 }
-close(CIN);
 
 # Integrity check, make sure all modules that we want enabled do
 # indeed have their configs set.