kconfig: Add LSMOD=file to override the lsmod for localmodconfig

Doing the following:

	make LSMOD=file localmodconfig

Will make the streamline-config code use the given file instead of
lsmod. If the file is an executable, it will execute it, otherwise
it will read it as text.

	make LSMOD=/my/local/path/lsmod localmodconfig

The above will execute the lsmod in /my/local/path instead of the
lsmods that may be located elsewhere.

	make LSMOD=embedded_board_lsmod localmodconfig

The above will read the "embedded_board_lsmod" as a text file. This
is useful if you are doing a cross compile and need to run the
config against modules that exist on an embedded device.

Note, if the LSMOD= file does is not a path, it will add the
path to the object directory. That is, the above example will look
for "embedded_board_lsmod" in the directory that the binary will
be built in (the O=dir directory).

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

 On branch config/linus

1 files changed, 11 insertions, 2 deletions

diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
index 006c96f5fcb5..85b906547845 100644
--- a/scripts/kconfig/Makefile
+++ b/scripts/kconfig/Makefile
@@ -30,9 +30,18 @@ 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 = $(shell if [ `basename $(LSMOD)` == $(LSMOD) ]; then \
+                echo $(objtree)/$(LSMOD);                       \
+        else                                                    \
+                echo $(LSMOD);                                  \
+        fi)
+endif
+
 localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
         $(Q)mkdir -p include/generated
-        $(Q)perl $< $(srctree) $(Kconfig) > .tmp.config
+        $(Q)perl $< $(srctree) $(Kconfig) $(LSMOD_F) > .tmp.config
         $(Q)if [ -f .config ]; then                             \
                         cmp -s .tmp.config .config ||           \
                         (mv -f .config .config.old.1;           \
@@ -47,7 +56,7 @@ localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
 
 localyesconfig: $(obj)/streamline_config.pl $(obj)/conf
         $(Q)mkdir -p include/generated
-        $(Q)perl $< $(srctree) $(Kconfig) > .tmp.config
+        $(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 ||           \