Add generation of ./scripts/mod/Module.ksymb file containing
associations of driver file names and corresponding CONFIG_*
symbol.
This file will be used by modpost to peg kconfig CONFIG_*
symbol to its corresponding module. This information will
be further exposed in userspace for extracting build options
for the required modules.
This approach faces the following limitations:
* in some cases there are more than one CONFIG_* option
for certain objects. This happens for the objects that are
part of more CONFIGs. Thus, all configs are returned for
this object names. For example, the mapping for clk_div6 is
CONFIG_ARCH_R8A73A4, CONFIG_ARCH_R8A7793 and many others.
* in some cases the driver file name does not match the
registered name for the module. For example:
Driver filename Module name
-----------------------------------
lineage-pem[.o] lineage_pem
phy-ab8500-usb[.o] abx5x0-usb
ehci-mxc[.o] mxc-ehci
etc.
There is no naming rule / standard between the driver
name and the registered module name.
This patch is part of a research project within
Google Summer of Code of porting 'make localmodconfig'
for backported drivers.
Signed-off-by: Cristina Moraru <cristina.morar...@gmail.com>
---
scripts/kconfig/streamline_config.pl | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/scripts/kconfig/streamline_config.pl
b/scripts/kconfig/streamline_config.pl
index b8c7b29..4833ede 100755
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -147,6 +147,7 @@ my %objects;
my $var;
my $iflevel = 0;
my @ifdeps;
+my @drv_objs;
# prevent recursion
my %read_kconfigs;
@@ -341,6 +342,10 @@ foreach my $makefile (@makefiles) {
# The objects have a hash mapping to a reference
# of an array of configs.
$objects{$1} = \@arr;
+ # Save objects corresponding to driver Makefiles
+ if (index($makefile, "./drivers/") == 0) {
+ push(@drv_objs, substr($obj, 0, -2));
+ }
}
}
}
@@ -348,6 +353,21 @@ foreach my $makefile (@makefiles) {
close($infile);
}
+sub gen_module_kconfigs {
+
+ my $module_ksymb = $ENV{'objtree'}."/scripts/mod/Module.ksymb";
+ my $key;
+
+ open(my $ksymbfile, '>', $module_ksymb) || die "Can not open
$module_ksymb for writing";
+
+ foreach (@drv_objs) {
+ print $ksymbfile "$_ " . "@{$objects{$_}}\n";
+ }
+ close $ksymbfile;
+}
+
+gen_module_kconfigs();
+
my %modules;
my $linfile;
--
2.7.4
