kbuild: Adapt mrproper targets

Use $(call descend,..) for mrproper as well.

Documentation/DocBook/Makefile

@@ -154,7 +154,6 @@ LOG     :=      $(patsubst %.sgml, %.log, $(BOOKS))
 OUT     :=      $(patsubst %.sgml, %.out, $(BOOKS))
 
 clean:
-	@echo 'Cleaning up (DocBook)'
 	@rm -f core *~
 	@rm -f $(BOOKS)
 	@rm -f $(DVI) $(AUX) $(TEX) $(LOG) $(OUT)
@@ -162,7 +161,6 @@ clean:
 	@rm -f $(C-procfs-example)
 
 mrproper:
-	@echo 'Making mrproper (DocBook)'
 	@rm -f $(PS) $(PDF)
 	@rm -f -r $(HTML) $(patsubst %.html,%,$(HTML))
 

Makefile

@@ -712,7 +712,7 @@ clean:	archclean
 		-name .\*.tmp -o -name .\*.d \) -type f -print \
 		| grep -v lxdialog/ | xargs rm -f
 	@rm -f $(CLEAN_FILES)
-	@$(MAKE) -f Documentation/DocBook/Makefile clean
+	@$(call descend,Documentation/DocBook,clean)
 
 mrproper: clean archmrproper
 	@echo 'Making mrproper'
@@ -722,7 +722,7 @@ mrproper: clean archmrproper
 	@rm -rf $(MRPROPER_DIRS)
 	@rm -f $(MRPROPER_FILES)
 	@$(call descend,scripts,mrproper)
-	@$(MAKE) -f Documentation/DocBook/Makefile mrproper
+	@$(call descend,Documentation/DocBook,mrproper)
 
 distclean: mrproper
 	@echo 'Making distclean'
@@ -809,7 +809,7 @@ help:
 # Documentation targets
 # ---------------------------------------------------------------------------
 sgmldocs psdocs pdfdocs htmldocs: scripts
-	@$(MAKE) -f Documentation/DocBook/Makefile $@
+	@$(call descend,Documentation/DocBook,$@)
 
 # Scripts to check various things for consistency
 # ---------------------------------------------------------------------------

scripts/Makefile

@@ -58,8 +58,6 @@ $(obj)/split-include $(obj)/docproc $(addprefix $(obj)/,$(tkparse-objs)) \
 $(obj)/conmakehash lxdialog: $(obj)/fixdep
 
 mrproper:
-	@echo 'Making mrproper (scripts)'
-	@rm -f $(tkparse-objs) $(obj)/kconfig.tk
-	@rm -f core $(host-progs)
-	@$(MAKE) -C lxdialog mrproper
+	@rm -f $(addprefix $(obj)/,$(tkparse-objs) $(obj)/kconfig.tk core $(host-progs))
+	@$(call descend,scripts/lxdialog,mrproper)
 

scripts/lxdialog/Makefile

@@ -44,4 +44,4 @@ ncurses:
 	fi
 
 mrproper:
-	@rm -f core $(host-progs) $(lxdialog-objs) ncurses
+	@rm -f $(addprefix $(obj)/,core $(host-progs) $(lxdialog-objs) ncurses)