kconfig: enable CONFIG_IKCONFIG from streamline_config.pl

Ingo Molnar suggested that the streamline_config.pl should enable
CONFIG_IKCONFIG to keep the current config in the kernel.
Then we can use scripts/extract-ikconfig to find the current
modules.

This patch changes streamline_config.pl to check if CONFIG_IKCONFIG
is not set, and if it is not, it enables it to be a module.

[ Impact: make current config options easier to find ]

Reported-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

1 files changed, 23 insertions, 10 deletions

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index caac952212ef..233464185a92 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -256,18 +256,31 @@ my %setconfigs;
 # Finally, read the .config file and turn off any module enabled that
 # we could not find a reason to keep enabled.
 while(<CIN>) {
-        if (/^(CONFIG.*)=(m|y)/) {
-                if (defined($configs{$1})) {
-                    $setconfigs{$1} = $2;
-                    print;
-                } elsif ($2 eq "m") {
-                    print "# $1 is not set\n";
-                } else {
-                    print;
-                }
+
+    if (/CONFIG_IKCONFIG/) {
+        if (/# CONFIG_IKCONFIG is not set/) {
+            # enable IKCONFIG at least as a module
+            print "CONFIG_IKCONFIG=m\n";
+            # don't ask about PROC
+            print "# CONFIG_IKCONFIG is not set\n";
+        } else {
+            print;
+        }
+        next;
+    }
+
+    if (/^(CONFIG.*)=(m|y)/) {
+        if (defined($configs{$1})) {
+            $setconfigs{$1} = $2;
+            print;
+        } elsif ($2 eq "m") {
+            print "# $1 is not set\n";
         } else {
-                print;
+            print;
         }
+    } else {
+        print;
+    }
 }
 close(CIN);