kbuild: Switch "make modules_install" to fast mode ;)

Use the same way we came up with for "make clean" for
"make modules_install", gaining a nice speed-up.

Also, some cosmetics for scripts/Makefile.clean

Makefile

@@ -544,8 +544,7 @@ _modinst_post:
 
 .PHONY: $(patsubst %, _modinst_%, $(SUBDIRS))
 $(patsubst %, _modinst_%, $(SUBDIRS)) :
-	+@$(call descend,$(patsubst _modinst_%,%,$@),modules_install)
-
+	$(Q)$(MAKE) MAKEFILES= -rR -f scripts/Makefile.modinst obj=$(patsubst _modinst_%,%,$@)
 else # CONFIG_MODULES
 
 # Modules not configured

drivers/scsi/aic7xxx/Makefile

@@ -24,8 +24,7 @@ endif
 clean-files := aic7xxx_seq.h aic7xxx_reg.h
 
 # Command to be executed upon make clean
-# Note: Assignment without ':' to force late evaluation of $(src)
-clean-rule = @$(MAKE) -C $(src)/aicasm clean
+clean-rule := $(MAKE) -C $(src)/aicasm clean
 
 include $(TOPDIR)/Rules.make
 
@@ -39,7 +38,7 @@ ifeq ($(CONFIG_AIC7XXX_BUILD_FIRMWARE),y)
 
 $(obj)/aic7xxx_seq.h: $(src)/aic7xxx.seq $(src)/aic7xxx.reg \
 		      $(obj)/aicasm/aicasm
-	$(obj)/aicasm/aicasm -I. -r $(obj)/aic7xxx_reg.h \
+	$(obj)/aicasm/aicasm -I$(obj) -r $(obj)/aic7xxx_reg.h \
 				 -o $(obj)/aic7xxx_seq.h $(src)/aic7xxx.seq
 
 $(obj)/aic7xxx_reg.h: $(obj)/aix7xxx_seq.h

scripts/Makefile.clean

+# ==========================================================================
+# Cleaning up
+# ==========================================================================
 
 src := $(obj)
 
@@ -8,6 +11,9 @@ __clean:
 
 include $(obj)/Makefile
 
+# Figure out what we need to build from the various variables
+# ==========================================================================
+
 __subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
 subdir-y	+= $(__subdir-y)
 __subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
@@ -17,26 +23,43 @@ subdir-n	+= $(__subdir-n)
 __subdir-	:= $(patsubst %/,%,$(filter %/, $(obj-)))
 subdir-		+= $(__subdir-)
 
+# Subdirectories we need to descend into
+
 subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
 subdir-ymn      := $(sort $(subdir-ym) $(subdir-n) $(subdir-))
 
+# Add subdir path
+
 EXTRA_TARGETS	:= $(addprefix $(obj)/,$(EXTRA_TARGETS))
 clean-files	:= $(addprefix $(obj)/,$(clean-files))
 host-progs	:= $(addprefix $(obj)/,$(host-progs))
 subdir-ymn	:= $(addprefix $(obj)/,$(subdir-ymn))
 
+# ==========================================================================
+
 __clean-files := $(wildcard $(EXTRA_TARGETS) $(host-progs) $(clean-files))
 
+quiet_cmd_clean = CLEAN   $(__cleanfiles)
+      cmd_clean = 	rm -f $(__clean-files);	$(clean-rule)
+
 __clean: $(subdir-ymn)
 ifneq ($(strip $(__clean-files) $(clean-rule)),)
-	rm -f $(__clean-files)
-	$(clean-rule)
+	$(call cmd,clean)
 else
 	@:
 endif
 
-.PHONY: $(subdir-ymn)
+# ===========================================================================
+# Generic stuff
+# ===========================================================================
+
+# Descending
+# ---------------------------------------------------------------------------
 
+.PHONY: $(subdir-ymn)
 $(subdir-ymn):
 	$(Q)$(MAKE) -rR -f scripts/Makefile.clean obj=$@
 
+# If quiet is set, only print short version of command
+
+cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))

scripts/Makefile.modinst

@@ -2,11 +2,47 @@
 # Installing modules
 # ==========================================================================
 
-quiet_cmd_modules_install = INSTALL $(obj-m)
-cmd_modules_install = mkdir -p $(MODLIB)/kernel/$(obj); \
-		      cp $(obj-m) $(MODLIB)/kernel/$(obj)
+src := $(obj)
+
+no-rules.make := 1
 
 .PHONY: modules_install
+modules_install:
+
+include .config
+
+#$(warning $(CONFIG_X86))
+
+include $(obj)/Makefile
+
+# Figure out what we need to build from the various variables
+# ==========================================================================
+
+# When an object is listed to be built compiled-in and modular,
+# only build the compiled-in version
+
+obj-m := $(filter-out $(obj-y),$(obj-m))
+
+__subdir-y	:= $(patsubst %/,%,$(filter %/, $(obj-y)))
+subdir-y	+= $(__subdir-y)
+__subdir-m	:= $(patsubst %/,%,$(filter %/, $(obj-m)))
+subdir-m	+= $(__subdir-m)
+obj-m		:= $(filter-out %/, $(obj-m))
+
+# Subdirectories we need to descend into
+
+subdir-ym	:= $(sort $(subdir-y) $(subdir-m))
+
+# Add subdir path
+
+obj-m		:= $(addprefix $(obj)/,$(obj-m))
+subdir-ym	:= $(addprefix $(obj)/,$(subdir-ym))
+
+# ==========================================================================
+
+quiet_cmd_modules_install = INSTALL $(obj-m)
+      cmd_modules_install = mkdir -p $(MODLIB)/kernel/$(obj); \
+			    cp $(obj-m) $(MODLIB)/kernel/$(obj)
 
 modules_install: $(subdir-ym)
 ifneq ($(obj-m),)
@@ -15,3 +51,17 @@ else
 	@:
 endif
 
+# ===========================================================================
+# Generic stuff
+# ===========================================================================
+
+# Descending
+# ---------------------------------------------------------------------------
+
+.PHONY: $(subdir-ym)
+$(subdir-ym):
+	$(Q)$(MAKE) -rR -f scripts/Makefile.modinst obj=$@
+
+# If quiet is set, only print short version of command
+
+cmd = @$(if $($(quiet)cmd_$(1)),echo '  $($(quiet)cmd_$(1))' &&) $(cmd_$(1))