On Wed, Dec 05, 2007 at 04:34:30PM +0900, Tejun Heo wrote:
> Tejun Heo wrote:
> >> It would also simplify the kbuild integration if depmod
> >> could read the modules as a space separated list where
> >> duplicates are allowed.
> >> If we do so then the is no reason to escape to the shell
> >> in Makeilfe.build and we do not have to remove duplicates either.
> >
> > I'm no Makefile expert so no doubt my modifications are ugly. But I
> > think producing a file w/ duplicates in it is just ugly.
>
> Oh, and, depmod should do just fine with duplicate entries as it is.
What is the purpose of REMOVE-DUP then?
If depmod handle duplicate entries there is no need to remove them.
And this change in Makefile.lib seems bogus:
+# make sure '/' follows subdirs
+subdir-y := $(patsubst %//,%/, $(addsuffix, /,$subdir-y))
+subdir-m := $(patsubst %//,%/, $(addsuffix, /,$subdir-m))
I commented it out and with my config everything seems to still
work as expected.
And I get scripts/mod/modpost built in a mrproper tree again (bug!).
subdir-y and subdir-m does not point to directories that
contains modules (built-in or not) so they can be ignored for modorder.
I did a quick hack up top of your patch and came up with the following.
I just checked that if I manually ran remove-dup then the resulting
module.order files were identical with a simple configuration (50 modules).
And I did not try out depmod at all.
Feel free to use this as an updated patch.
Sam
diff --git a/Makefile b/Makefile
index 92dc3cb..9309e89 100644
--- a/Makefile
+++ b/Makefile
@@ -1023,6 +1023,7 @@ all: modules
PHONY += modules
modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux)
+ $(Q)cat $(vmlinux-dirs:%=$(objtree)/%/modules.order) > $(objtree)/modules.order
@echo ' Building modules, stage 2.';
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
@@ -1050,6 +1051,7 @@ _modinst_:
rm -f $(MODLIB)/build ; \
ln -s $(objtree) $(MODLIB)/build ; \
fi
+ @cp -f $(objtree)/modules.order $(MODLIB)/
$(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modinst
# This depmod is only for convenience to give the initial
@@ -1109,7 +1111,7 @@ clean: archclean $(clean-dirs)
@find . $(RCS_FIND_IGNORE) \
\( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \
-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
- -o -name '*.symtypes' \) \
+ -o -name '*.symtypes' -o -name 'modules.order' \) \
-type f -print | xargs rm -f
# mrproper - Delete all generated files, including .config
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index de9836e..ac68c70 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -83,10 +83,12 @@ ifneq ($(strip $(obj-y) $(obj-m) $(obj-n) $(obj-) $(lib-target)),)
builtin-target := $(obj)/built-in.o
endif
+modorder-target := $(obj)/modules.order
+
# We keep a list of all modules in $(MODVERDIR)
__build: $(if $(KBUILD_BUILTIN),$(builtin-target) $(lib-target) $(extra-y)) \
- $(if $(KBUILD_MODULES),$(obj-m)) \
+ $(if $(KBUILD_MODULES),$(obj-m) $(modorder-target)) \
$(subdir-ym) $(always)
@:
@@ -276,6 +278,18 @@ targets += $(builtin-target)
endif # builtin-target
#
+# Rule to create modules.order file
+#
+# Create commands to etiher record .ko file
+# or cat modules.order from a subdirectory
+modorder-cmds = \
+ $(foreach m, $(modorder), \
+ $(if $(filter %/modules.order, $m), \
+ cat $m;, echo kernel/$m;))
+
+$(modorder-target): $(subdir-ym) FORCE
+ $(Q)(cat /dev/null; $(modorder-cmds)) > $@
+#
# Rule to compile a set of .o files into one .a file
#
ifdef lib-target
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index 3c5e88b..4dedea1 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -25,6 +25,11 @@ lib-y := $(filter-out $(obj-y), $(sort $(lib-y) $(lib-m)))
# o if we encounter foo/ in $(obj-m), remove it from $(obj-m)
# and add the directory to the list of dirs to descend into: $(subdir-m)
+# Determine modorder.
+# Unfortunately we don't have information about ordering between -y
+# and -m subdirs. Just put -y's first.
+modorder := $(patsubst %/,%/modules.order, $(filter %/, $(obj-y)) $(obj-m:.o=.ko))
+
__subdir-y := $(patsubst %/,%,$(filter %/, $(obj-y)))
subdir-y += $(__subdir-y)
__subdir-m := $(patsubst %/,%,$(filter %/, $(obj-m)))
@@ -64,6 +69,7 @@ real-objs-m := $(foreach m, $(obj-m), $(if $(strip $($(m:.o=-objs)) $($(m:.o=-y)
extra-y := $(addprefix $(obj)/,$(extra-y))
always := $(addprefix $(obj)/,$(always))
targets := $(addprefix $(obj)/,$(targets))
+modorder := $(addprefix $(obj)/,$(modorder))
obj-y := $(addprefix $(obj)/,$(obj-y))
obj-m := $(addprefix $(obj)/,$(obj-m))
lib-y := $(addprefix $(obj)/,$(lib-y))
--
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