From: Josh Poimboeuf <jpoimboe@redhat.com>
To: Masahiro Yamada <masahiroy@kernel.org>
Cc: linux-kbuild@vger.kernel.org,
Michal Marek <michal.lkml@markovi.net>,
Nick Desaulniers <ndesaulniers@google.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 03/13] kbuild: store the objtool command in *.cmd files
Date: Sat, 4 Sep 2021 11:45:30 -0700 [thread overview]
Message-ID: <20210904184530.k6nwfesugx2su2hy@treble> (raw)
In-Reply-To: <20210904180434.qkdbs27i5f2vtoxv@treble>
On Sat, Sep 04, 2021 at 11:04:37AM -0700, Josh Poimboeuf wrote:
> On Tue, Aug 31, 2021 at 04:39:54PM +0900, Masahiro Yamada wrote:
> > objtool_dep includes include/config/{ORC_UNWINDER,STACK_VALIDATION}
> > so that all the objects are rebuilt when any of CONFIG_ORC_UNWINDER
> > and CONFIG_STACK_VALIDATION is toggled.
> >
> > As you can see in 'objtool_args', there are more CONFIG options
> > that affect the objtool command line.
> >
> > Adding more and more include/config/* is ugly and unmaintainable.
> >
> > Another issue is that non-standard objects are needlessly rebuilt.
> > Objects specified as OBJECT_FILES_NON_STANDARD is not processed by
> > objtool, but they are rebuilt anyway when CONFIG_ORC_UNWINDER or
> > CONFIG_STACK_VALIDATION is toggled. This is not a big deal, but
> > better to fix.
> >
> > A cleaner and more precise fix is to include the objtool command in
> > *.cmd files so any command change is naturally detected by if_change.
>
> Nice improvement, thanks!
>
> s/CONFIG_ORC_UNWINDER/CONFIG_UNWINDER_ORC/g
>
> And yes, this means the original ORC unwinder dependency didn't
> work:
>
> > -objtool_dep = $(objtool_obj) \
> > - $(wildcard include/config/ORC_UNWINDER \
> > - include/config/STACK_VALIDATION)
With the typos fixed, and this dependency bug mentioned in the commit
log:
Acked-by: Josh Poimboeuf <jpoimboe@redhat.com>
--
Josh
next prev parent reply other threads:[~2021-09-04 18:45 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-31 7:39 [PATCH v2 00/13] kbuild: second round of Clang LTO refactoring Masahiro Yamada
2021-08-31 7:39 ` [PATCH v2 01/13] kbuild: move objtool_args back to scripts/Makefile.build Masahiro Yamada
2021-09-04 18:18 ` Josh Poimboeuf
2021-08-31 7:39 ` [PATCH v2 02/13] kbuild: rename __objtool_obj to objtool Masahiro Yamada
2021-08-31 17:16 ` Nick Desaulniers
2021-08-31 17:29 ` Kees Cook
2021-09-04 18:19 ` Josh Poimboeuf
2021-08-31 7:39 ` [PATCH v2 03/13] kbuild: store the objtool command in *.cmd files Masahiro Yamada
2021-08-31 17:23 ` Nick Desaulniers
2021-08-31 17:30 ` Kees Cook
2021-09-04 18:04 ` Josh Poimboeuf
2021-09-04 18:45 ` Josh Poimboeuf [this message]
2021-09-08 16:12 ` Masahiro Yamada
2021-08-31 7:39 ` [PATCH v2 04/13] kbuild: factor out OBJECT_FILES_NON_STANDARD check into a macro Masahiro Yamada
2021-08-31 17:25 ` Nick Desaulniers
2021-08-31 17:31 ` Kees Cook
2021-09-04 18:59 ` Josh Poimboeuf
2021-08-31 7:39 ` [PATCH v2 05/13] kbuild: detect objtool update without using .SECONDEXPANSION Masahiro Yamada
2021-08-31 17:32 ` Kees Cook
2021-09-03 0:43 ` Masahiro Yamada
2021-08-31 17:33 ` Nick Desaulniers
2021-09-02 23:42 ` Masahiro Yamada
2021-09-04 19:04 ` Josh Poimboeuf
2021-08-31 7:39 ` [PATCH v2 06/13] kbuild: reuse $(cmd_objtool) for cmd_cc_lto_link_modules Masahiro Yamada
2021-08-31 17:35 ` Kees Cook
2021-09-03 0:39 ` Masahiro Yamada
2021-09-03 1:49 ` Kees Cook
2021-09-04 19:11 ` Josh Poimboeuf
2021-08-31 7:39 ` [PATCH v2 07/13] kbuild: do not create built-in.a.symversions or lib.a.symversions Masahiro Yamada
2021-08-31 17:36 ` Kees Cook
2021-08-31 7:39 ` [PATCH v2 08/13] kbuild: build modules in the same way with/without Clang LTO Masahiro Yamada
2021-08-31 17:39 ` Kees Cook
2021-08-31 17:46 ` Nick Desaulniers
2021-08-31 7:40 ` [PATCH v2 09/13] kbuild: add cmd_and_savecmd macro Masahiro Yamada
2021-08-31 17:39 ` Kees Cook
2021-08-31 7:40 ` [PATCH v2 10/13] kbuild: rebuild modules when objtool is updated for CONFIG_LTO_CLANG Masahiro Yamada
2021-08-31 17:40 ` Kees Cook
2021-09-04 19:13 ` Josh Poimboeuf
2021-08-31 7:40 ` [PATCH v2 11/13] kbuild: always postpone CRC links for module versioning Masahiro Yamada
2021-08-31 7:40 ` [PATCH v2 12/13] kbuild: merge cmd_modversions_c and cmd_modversions_S Masahiro Yamada
2021-08-31 7:40 ` [PATCH v2 13/13] kbuild: merge cmd_ar_builtin and cmd_ar_module Masahiro Yamada
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