diff mbox series

[v2,01/13] kbuild: move objtool_args back to scripts/Makefile.build

Message ID 20210831074004.3195284-2-masahiroy@kernel.org (mailing list archive)
State New, archived
Headers show
Series kbuild: second round of Clang LTO refactoring | expand

Commit Message

Masahiro Yamada Aug. 31, 2021, 7:39 a.m. UTC 
Commit b1a1a1a09b46 ("kbuild: lto: postpone objtool") moved objtool_args
to Makefile.lib, so the arguments can be used in Makefile.modfinal as
well as Makefile.build.

With commit 2b1d7fc05467 ("kbuild: Fix TRIM_UNUSED_KSYMS with
LTO_CLANG"), module LTO linking came back to scripts/Makefile.build
again.

So, there is no more reason to keep objtool_args in a separate file.

Get it back to the original place, close to the objtool command.

Remove the stale comment too.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
---

 scripts/Makefile.build | 10 ++++++++++
 scripts/Makefile.lib   | 11 -----------
 2 files changed, 10 insertions(+), 11 deletions(-)

Comments

Josh Poimboeuf Sept. 4, 2021, 6:18 p.m. UTC | #1 
On Tue, Aug 31, 2021 at 04:39:52PM +0900, Masahiro Yamada wrote:
> Commit b1a1a1a09b46 ("kbuild: lto: postpone objtool") moved objtool_args
> to Makefile.lib, so the arguments can be used in Makefile.modfinal as
> well as Makefile.build.
> 
> With commit 2b1d7fc05467 ("kbuild: Fix TRIM_UNUSED_KSYMS with
> LTO_CLANG"), module LTO linking came back to scripts/Makefile.build
> again.
> 
> So, there is no more reason to keep objtool_args in a separate file.
> 
> Get it back to the original place, close to the objtool command.
> 
> Remove the stale comment too.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> Reviewed-by: Kees Cook <keescook@chromium.org>

Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
diff mbox series

Patch

diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 3efc984d4c69..17508c0e4358 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -224,6 +224,16 @@  cmd_record_mcount = $(if $(findstring $(strip $(CC_FLAGS_FTRACE)),$(_c_flags)),
 endif # CONFIG_FTRACE_MCOUNT_USE_RECORDMCOUNT
 
 ifdef CONFIG_STACK_VALIDATION
+
+objtool_args =								\
+	$(if $(CONFIG_UNWINDER_ORC),orc generate,check)			\
+	$(if $(part-of-module), --module)				\
+	$(if $(CONFIG_FRAME_POINTER),, --no-fp)				\
+	$(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), --no-unreachable)\
+	$(if $(CONFIG_RETPOLINE), --retpoline)				\
+	$(if $(CONFIG_X86_SMAP), --uaccess)				\
+	$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)
+
 ifndef CONFIG_LTO_CLANG
 
 __objtool_obj := $(objtree)/tools/objtool/objtool
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index cd011f3f6f78..34c4c11c4bc1 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -232,17 +232,6 @@  ifeq ($(CONFIG_LTO_CLANG),y)
 mod-prelink-ext := .lto
 endif
 
-# Objtool arguments are also needed for modfinal with LTO, so we define
-# then here to avoid duplication.
-objtool_args =								\
-	$(if $(CONFIG_UNWINDER_ORC),orc generate,check)			\
-	$(if $(part-of-module), --module)				\
-	$(if $(CONFIG_FRAME_POINTER),, --no-fp)				\
-	$(if $(CONFIG_GCOV_KERNEL)$(CONFIG_LTO_CLANG), --no-unreachable)\
-	$(if $(CONFIG_RETPOLINE), --retpoline)				\
-	$(if $(CONFIG_X86_SMAP), --uaccess)				\
-	$(if $(CONFIG_FTRACE_MCOUNT_USE_OBJTOOL), --mcount)
-
 # Useful for describing the dependency of composite objects
 # Usage:
 #   $(call multi_depend, multi_used_targets, suffix_to_remove, suffix_to_add)