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While debugging the problem with localmodconfig and the ALSA codec

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modules all being set, I discovered a small bug in the dependency
 logic.
 
 If a config has a dependency based on its setting value, localmodcondig
 misses it.
 
 For example:
 
 config FOO
     default y if BAR || ZOO
 
 If FOO is needed for a module and is set to '=m', and so are BAR or ZOO,
 localmodconfig will not see that BAR or ZOO are also needed for the foo
 module, and will incorrectly disable them.
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Merge tag 'localmodconfig-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-kconfig

Pull localmodconfig update from Steven Rostedt:
 "While debugging the problem with localmodconfig and the ALSA codec
  modules all being set, I discovered a small bug in the dependency
  logic.

  If a config has a dependency based on its setting value,
  localmodcondig misses it.

  For example:

    config FOO
        default y if BAR || ZOO

  If FOO is needed for a module and is set to '=m', and so are BAR or
  ZOO, localmodconfig will not see that BAR or ZOO are also needed for
  the foo module, and will incorrectly disable them"

* tag 'localmodconfig-v3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-kconfig:
  localmodconfig: Add config depends by default settings
This commit is contained in:
Linus Torvalds 2014-01-20 09:37:38 -08:00
commit edde1fb8c4
1 changed files with 7 additions and 0 deletions
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7
scripts/kconfig/streamline_config.pl
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@ -219,6 +219,13 @@ sub read_kconfig {
$depends{$config} = $1;
} elsif ($state eq "DEP" && /^\s*depends\s+on\s+(.*)$/) {
$depends{$config} .= " " . $1;
} elsif ($state eq "DEP" && /^\s*def(_(bool|tristate)|ault)\s+(\S.*)$/) {
my $dep = $3;
if ($dep !~ /^\s*(y|m|n)\s*$/) {
$dep =~ s/.*\sif\s+//;
$depends{$config} .= " " . $dep;
dprint "Added default depends $dep to $config\n";
}
# Get the configs that select this config
} elsif ($state ne "NONE" && /^\s*select\s+(\S+)/) {