New patch to review for coreboot: kconfig_lint: Exclude some Kconfig symbols from unused symbol checks

[Martin Roth]

Martin Roth ([e-mail]) just uploaded a new patch set to gerrit, which you can find at https://review.coreboot.org/13457

-gerrit

commit a70eaa603365ee9b36eec53af96a1f87ccf6ef07
Author: Martin Roth 
Date:   Mon Jan 25 16:12:49 2016 -0700

kconfig_lint: Exclude some Kconfig symbols from unused symbol checks

The configuration that coreboot uses for setting selected symbols
    typically involves a structure like this:
    config BLEH_SPECIFIC_OPTIONS
    def_bool y
    select SYMBOL

This leads to an an extra kconfig symbol BLEH_SPECIFIC_OPTIONS
    that is never referenced by anything else, generating a warning.

Since this is currently the construct that coreboot uses, filter it
    out of the warnings for now.

Change-Id: I85a95e4c4e8469870c7f219f2a92955819845573
    Signed-off-by: Martin Roth 
---
 util/lint/kconfig_lint | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/util/lint/kconfig_lint b/util/lint/kconfig_lint
index 4315768..44e898f 100755
--- a/util/lint/kconfig_lint
+++ b/util/lint/kconfig_lint
@@ -51,6 +51,8 @@ my %used_symbols;          # structure of symbols used in the tree, and where th
 my @collected_symbols;     #
 my %selected_symbols;      # list of symbols that are enabled by a select statement

+my $exclude_unused = '_SPECIFIC_OPTIONS|SOUTH_BRIDGE_OPTIONS';
+
 Main();

#-------------------------------------------------------------------------------
@@ -380,6 +382,10 @@ sub check_used_symbols {
     # loop through all defined symbols and see if they're used anywhere
     foreach my $key ( sort ( keys %symbols ) ) {

+        if ( $key =~ /$exclude_unused/ ) {
+            next;
+        }
+
         #see if they're used internal to Kconfig
         next if ( exists $referenced_symbols{$key} );