4 files changed, 93 insertions, 7 deletions

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 80599e3a7994..186c46604d06 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -27,10 +27,20 @@ oldconfig: $(obj)/conf
         $< -o $(Kconfig)
 
 silentoldconfig: $(obj)/conf
+        $(Q)mkdir -p include/generated
         $< -s $(Kconfig)
 
+# if no path is given, then use src directory to find file
+ifdef LSMOD
+LSMOD_F := $(LSMOD)
+ifeq ($(findstring /,$(LSMOD)),)
+  LSMOD_F := $(objtree)/$(LSMOD)
+endif
+endif
+
 localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
-        $(Q)perl $< $(srctree) $(Kconfig) > .tmp.config
+        $(Q)mkdir -p include/generated
+        $(Q)perl $< $(srctree) $(Kconfig) $(LSMOD_F) > .tmp.config
         $(Q)if [ -f .config ]; then                             \
                         cmp -s .tmp.config .config ||           \
                         (mv -f .config .config.old.1;           \
@@ -44,7 +54,8 @@ localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
         $(Q)rm -f .tmp.config
 
 localyesconfig: $(obj)/streamline_config.pl $(obj)/conf
-        $(Q)perl $< $(srctree) $(Kconfig) > .tmp.config
+        $(Q)mkdir -p include/generated
+        $(Q)perl $< $(srctree) $(Kconfig) $(LSMOD_F) > .tmp.config
         $(Q)sed -i s/=m/=y/ .tmp.config
         $(Q)if [ -f .config ]; then                             \
                         cmp -s .tmp.config .config ||           \
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index b55e72ff2fc6..c4dec80cfd8e 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -677,7 +677,7 @@ int conf_write_autoconf(void)
         struct symbol *sym;
         const char *str;
         const char *name;
-        FILE *out, *out_h;
+        FILE *out, *tristate, *out_h;
         time_t now;
         int i, l;
 
@@ -692,9 +692,16 @@ int conf_write_autoconf(void)
         if (!out)
                 return 1;
 
+        tristate = fopen(".tmpconfig_tristate", "w");
+        if (!tristate) {
+                fclose(out);
+                return 1;
+        }
+
         out_h = fopen(".tmpconfig.h", "w");
         if (!out_h) {
                 fclose(out);
+                fclose(tristate);
                 return 1;
         }
 
@@ -707,6 +714,9 @@ int conf_write_autoconf(void)
                      "# %s"
                      "#\n",
                      sym_get_string_value(sym), ctime(&now));
+        fprintf(tristate, "#\n"
+                          "# Automatically generated - do not edit\n"
+                          "\n");
         fprintf(out_h, "/*\n"
                        " * Automatically generated C config: don't edit\n"
                        " * Linux kernel version: %s\n"
@@ -727,10 +737,14 @@ int conf_write_autoconf(void)
                                 break;
                         case mod:
                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
+                                fprintf(tristate, "CONFIG_%s=M\n", sym->name);
                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
                                 break;
                         case yes:
                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
+                                if (sym->type == S_TRISTATE)
+                                        fprintf(tristate, "CONFIG_%s=Y\n",
+                                                        sym->name);
                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
                                 break;
                         }
@@ -772,13 +786,19 @@ int conf_write_autoconf(void)
                 }
         }
         fclose(out);
+        fclose(tristate);
         fclose(out_h);
 
         name = getenv("KCONFIG_AUTOHEADER");
         if (!name)
-                name = "include/linux/autoconf.h";
+                name = "include/generated/autoconf.h";
         if (rename(".tmpconfig.h", name))
                 return 1;
+        name = getenv("KCONFIG_TRISTATE");
+        if (!name)
+                name = "include/config/tristate.conf";
+        if (rename(".tmpconfig_tristate", name))
+                return 1;
         name = conf_get_autoconfig_name();
         /*
          * This must be the last step, kbuild has a dependency on auto.conf
diff --git a/scripts/kconfig/mconf.c b/scripts/kconfig/mconf.c
index d82953573588..8413cf38ed27 100644
--- a/scripts/kconfig/mconf.c
+++ b/scripts/kconfig/mconf.c
@@ -213,7 +213,7 @@ load_config_help[] = N_(
         "to modify that configuration.\n"
         "\n"
         "If you are uncertain, then you have probably never used alternate\n"
-        "configuration files.  You should therefor leave this blank to abort.\n"),
+        "configuration files. You should therefore leave this blank to abort.\n"),
 save_config_text[] = N_(
         "Enter a filename to which this configuration should be saved "
         "as an alternate.  Leave blank to abort."),
diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 0d800820c3cd..afbd54ac1d83 100644
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -113,6 +113,7 @@ find_config;
 # Get the build source and top level Kconfig file (passed in)
 my $ksource = $ARGV[0];
 my $kconfig = $ARGV[1];
+my $lsmod_file = $ARGV[2];
 
 my @makefiles = `find $ksource -name Makefile`;
 my %depends;
@@ -121,6 +122,8 @@ my %prompts;
 my %objects;
 my $var;
 my $cont = 0;
+my $iflevel = 0;
+my @ifdeps;
 
 # prevent recursion
 my %read_kconfigs;
@@ -146,6 +149,15 @@ sub read_kconfig {
             $state = "NEW";
             $config = $1;
 
+            for (my $i = 0; $i < $iflevel; $i++) {
+                if ($i) {
+                    $depends{$config} .= " " . $ifdeps[$i];
+                } else {
+                    $depends{$config} = $ifdeps[$i];
+                }
+                $state = "DEP";
+            }
+
         # collect the depends for the config
         } elsif ($state eq "NEW" && /^\s*depends\s+on\s+(.*)$/) {
             $state = "DEP";
@@ -166,6 +178,21 @@ sub read_kconfig {
             # note if the config has a prompt
             $prompt{$config} = 1;
 
+        # Check for if statements
+        } elsif (/^if\s+(.*\S)\s*$/) {
+            my $deps = $1;
+            # remove beginning and ending non text
+            $deps =~ s/^[^a-zA-Z0-9_]*//;
+            $deps =~ s/[^a-zA-Z0-9_]*$//;
+
+            my @deps = split /[^a-zA-Z0-9_]+/, $deps;
+
+            $ifdeps[$iflevel++] = join ':', @deps;
+
+        } elsif (/^endif/) {
+
+            $iflevel-- if ($iflevel);
+
         # stop on "help"
         } elsif (/^\s*help\s*$/) {
             $state = "NONE";
@@ -237,8 +264,36 @@ foreach my $makefile (@makefiles) {
 
 my %modules;
 
-# see what modules are loaded on this system
-open(LIN,"/sbin/lsmod|") || die "Cant lsmod";
+if (defined($lsmod_file)) {
+    if ( ! -f $lsmod_file) {
+        die "$lsmod_file not found";
+    }
+    if ( -x $lsmod_file) {
+        # the file is executable, run it
+        open(LIN, "$lsmod_file|");
+    } else {
+        # Just read the contents
+        open(LIN, "$lsmod_file");
+    }
+} else {
+
+    # see what modules are loaded on this system
+    my $lsmod;
+
+    foreach $dir ( ("/sbin", "/bin", "/usr/sbin", "/usr/bin") ) {
+        if ( -x "$dir/lsmod" ) {
+            $lsmod = "$dir/lsmod";
+            last;
+        }
+}
+    if (!defined($lsmod)) {
+        # try just the path
+        $lsmod = "lsmod";
+    }
+
+    open(LIN,"$lsmod|") || die "Can not call lsmod with $lsmod";
+}
+
 while (<LIN>) {
         next if (/^Module/);  # Skip the first line.
         if (/^(\S+)/) {