ftrace/kbuild: Add recordmcount files to force full build
Michal Marek [Tue, 17 May 2011 13:36:46 +0000 (15:36 +0200)]
Modifications to recordmcount must be performed on all object
files to stay consistent with what the kernel code may expect.
Add the recordmcount files to the main dependencies to make sure
any change to them causes a full recompile.

Signed-off-by: Michal Marek <mmarek@suse.cz>
Link: http://lkml.kernel.org/r/20110517133646.GP13293@sepie.suse.cz
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

scripts/Makefile.build

index fdca952..6165622 100644 (file)
@@ -255,6 +255,8 @@ sub_cmd_record_mcount =                                     \
        if [ $(@) != "scripts/mod/empty.o" ]; then      \
                $(objtree)/scripts/recordmcount $(RECORDMCOUNT_FLAGS) "$(@)";   \
        fi;
+recordmcount_source := $(srctree)/scripts/recordmcount.c \
+                   $(srctree)/scripts/recordmcount.h
 else
 sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH)" \
        "$(if $(CONFIG_CPU_BIG_ENDIAN),big,little)" \
@@ -262,6 +264,7 @@ sub_cmd_record_mcount = set -e ; perl $(srctree)/scripts/recordmcount.pl "$(ARCH
        "$(OBJDUMP)" "$(OBJCOPY)" "$(CC) $(KBUILD_CFLAGS)" \
        "$(LD)" "$(NM)" "$(RM)" "$(MV)" \
        "$(if $(part-of-module),1,0)" "$(@)";
+recordmcount_source := $(srctree)/scripts/recordmcount.pl
 endif
 cmd_record_mcount =                                            \
        if [ "$(findstring -pg,$(_c_flags))" = "-pg" ]; then    \
@@ -282,13 +285,13 @@ define rule_cc_o_c
 endef
 
 # Built-in and composite module parts
-$(obj)/%.o: $(src)/%.c FORCE
+$(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
        $(call cmd,force_checksrc)
        $(call if_changed_rule,cc_o_c)
 
 # Single-part modules are special since we need to mark them in $(MODVERDIR)
 
-$(single-used-m): $(obj)/%.o: $(src)/%.c FORCE
+$(single-used-m): $(obj)/%.o: $(src)/%.c $(recordmcount_source) FORCE
        $(call cmd,force_checksrc)
        $(call if_changed_rule,cc_o_c)
        @{ echo $(@:.o=.ko); echo $@; } > $(MODVERDIR)/$(@F:.o=.mod)