[PATCH 6/7] linux-kbuild: fix: configs with defaults do not need a prompt

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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@xxxxxxxxx>
---
 scripts/kconfig/streamline_config.pl | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 593df824ead7..948437aac535 100755
--- 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;
@@ -239,6 +240,7 @@ sub read_kconfig {
 	    $depends{$config} .= " " . $1;
 	} elsif (($state eq "DEP" || $state eq "NEW") && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) {
 	    my $dep = $3;
+            $defaults{$config} = 1 ;
 	    if ($dep !~ /^\s*(y|m|n)\s*$/) {
 		$dep =~ s/.*\sif\s+//;
 		$depends{$config} .= " " . $dep;
@@ -561,8 +563,16 @@ 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;
     }
 
-- 
2.43.0





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