streamline_config.pl: remove prompt warnings for configs with defaults

Ignore process select warnings for config entries that have a default
option. Some config entries have no prompt, and nothing selects them, but
these config options are okay because they have a default option.

Signed-off-by: David Hunter <david.hunter.linux@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 85f4712e2bf32eca966f3c0d3e03b11b98e32d6a..8e23faab5d2277cdfc0d913c20daac02cb2782d2 100755 (executable)
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -144,6 +144,7 @@ my %selects;
 my %prompts;
 my %objects;
 my %config2kfile;
+my %defaults;
 my $var;
 my $iflevel = 0;
 my @ifdeps;
@@ -222,6 +223,7 @@ sub read_kconfig {
            $depends{$config} .= " " . $1;
        } elsif ($state ne "NONE" && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) {
            my $dep = $3;
+            $defaults{$config} = 1;
            if ($dep !~ /^\s*(y|m|n)\s*$/) {
                $dep =~ s/.*\sif\s+//;
                $depends{$config} .= " " . $dep;
@@ -523,8 +525,16 @@ sub parse_config_selects
 
     # If no possible config selected this, then something happened.
     if (!defined($next_config)) {
-       print STDERR "WARNING: $config is required, but nothing in the\n";
-       print STDERR "  current config selects it.\n";
+
+       # Some config options have no prompt, and nothing selects them, but
+       # they stay turned on once the final checks for the configs
+       # are done. These configs have a default option, so turn off the
+       # warnings for configs with default options.
+       if (!defined($defaults{$config})) {
+           print STDERR "WARNING: $config is required, but nothing in the\n";
+           print STDERR "  current config selects it.\n";
+       }
+
        return;
     }