From: Sami Tolvanen <samitolvanen@google.com> To: Masahiro Yamada <masahiroy@kernel.org>, Will Deacon <will@kernel.org>, Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Paul E. McKenney" <paulmck@kernel.org>, Kees Cook <keescook@chromium.org>, Nick Desaulniers <ndesaulniers@google.com>, clang-built-linux@googlegroups.com, kernel-hardening@lists.openwall.com, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org, Sami Tolvanen <samitolvanen@google.com> Subject: [PATCH v5 19/29] scripts/mod: disable LTO for empty.c Date: Fri, 9 Oct 2020 09:13:28 -0700 [thread overview] Message-ID: <20201009161338.657380-20-samitolvanen@google.com> (raw) In-Reply-To: <20201009161338.657380-1-samitolvanen@google.com> With CONFIG_LTO_CLANG, clang generates LLVM IR instead of ELF object files. As empty.o is used for probing target properties, disable LTO for it to produce an object file instead. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> --- scripts/mod/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index 78071681d924..c9e38ad937fd 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 OBJECT_FILES_NON_STANDARD := y +CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO) hostprogs-always-y += modpost mk_elfconfig always-y += empty.o -- 2.28.0.1011.ga647a8990f-goog
WARNING: multiple messages have this Message-ID (diff)
From: Sami Tolvanen <samitolvanen@google.com> To: Masahiro Yamada <masahiroy@kernel.org>, Will Deacon <will@kernel.org>, Steven Rostedt <rostedt@goodmis.org> Cc: linux-arch@vger.kernel.org, x86@kernel.org, Kees Cook <keescook@chromium.org>, "Paul E. McKenney" <paulmck@kernel.org>, kernel-hardening@lists.openwall.com, Peter Zijlstra <peterz@infradead.org>, Greg Kroah-Hartman <gregkh@linuxfoundation.org>, linux-kbuild@vger.kernel.org, Nick Desaulniers <ndesaulniers@google.com>, linux-kernel@vger.kernel.org, clang-built-linux@googlegroups.com, Sami Tolvanen <samitolvanen@google.com>, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH v5 19/29] scripts/mod: disable LTO for empty.c Date: Fri, 9 Oct 2020 09:13:28 -0700 [thread overview] Message-ID: <20201009161338.657380-20-samitolvanen@google.com> (raw) In-Reply-To: <20201009161338.657380-1-samitolvanen@google.com> With CONFIG_LTO_CLANG, clang generates LLVM IR instead of ELF object files. As empty.o is used for probing target properties, disable LTO for it to produce an object file instead. Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Kees Cook <keescook@chromium.org> --- scripts/mod/Makefile | 1 + 1 file changed, 1 insertion(+) diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile index 78071681d924..c9e38ad937fd 100644 --- a/scripts/mod/Makefile +++ b/scripts/mod/Makefile @@ -1,5 +1,6 @@ # SPDX-License-Identifier: GPL-2.0 OBJECT_FILES_NON_STANDARD := y +CFLAGS_REMOVE_empty.o += $(CC_FLAGS_LTO) hostprogs-always-y += modpost mk_elfconfig always-y += empty.o -- 2.28.0.1011.ga647a8990f-goog _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-10-09 16:15 UTC|newest] Thread overview: 111+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-10-09 16:13 [PATCH v5 00/29] Add support for Clang LTO Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 01/29] kbuild: preprocess module linker script Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 02/29] objtool: Add a pass for generating __mcount_loc Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 03/29] objtool: Don't autodetect vmlinux.o Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 04/29] tracing: move function tracer options to Kconfig Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 05/29] tracing: add support for objtool mcount Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 06/29] x86, build: use " Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 07/29] treewide: remove DISABLE_LTO Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 08/29] kbuild: add support for Clang LTO Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 09/29] kbuild: lto: fix module versioning Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 10/29] objtool: Split noinstr validation from --vmlinux Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 11/29] kbuild: lto: postpone objtool Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 12/29] kbuild: lto: limit inlining Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 13/29] kbuild: lto: merge module sections Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 14/29] kbuild: lto: remove duplicate dependencies from .mod files Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 15/29] init: lto: ensure initcall ordering Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 16/29] init: lto: fix PREL32 relocations Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 17/29] PCI: Fix PREL32 relocations for LTO Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 18/29] modpost: lto: strip .lto from module names Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen [this message] 2020-10-09 16:13 ` [PATCH v5 19/29] scripts/mod: disable LTO for empty.c Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 20/29] efi/libstub: disable LTO Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 21/29] drivers/misc/lkdtm: disable LTO for rodata.o Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 22/29] arm64: vdso: disable LTO Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 23/29] KVM: arm64: disable LTO for the nVHE directory Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 24/29] arm64: disable recordmcount with DYNAMIC_FTRACE_WITH_REGS Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 25/29] arm64: allow LTO_CLANG and THINLTO to be selected Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-12 8:31 ` Will Deacon 2020-10-12 8:31 ` Will Deacon 2020-10-12 20:44 ` Kees Cook 2020-10-12 20:44 ` Kees Cook 2020-10-12 20:51 ` Will Deacon 2020-10-12 20:51 ` Will Deacon 2020-10-12 21:02 ` Kees Cook 2020-10-12 21:02 ` Kees Cook 2020-10-09 16:13 ` [PATCH v5 26/29] x86/asm: annotate indirect jumps Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 27/29] x86, vdso: disable LTO only for vDSO Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 28/29] x86, cpu: disable LTO for cpu.c Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` [PATCH v5 29/29] x86, build: allow LTO_CLANG and THINLTO to be selected Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:13 ` Sami Tolvanen 2020-10-09 16:30 ` [PATCH v5 00/29] Add support for Clang LTO Sedat Dilek 2020-10-09 16:30 ` Sedat Dilek 2020-10-09 16:30 ` Sedat Dilek 2020-10-09 20:50 ` Sami Tolvanen 2020-10-09 20:50 ` Sami Tolvanen 2020-10-09 19:35 ` Steven Rostedt 2020-10-09 21:05 ` Sami Tolvanen 2020-10-09 21:05 ` Sami Tolvanen 2020-10-09 23:38 ` Steven Rostedt 2020-10-09 23:38 ` Steven Rostedt 2020-10-10 0:00 ` Sami Tolvanen 2020-10-10 0:00 ` Sami Tolvanen 2020-10-10 0:00 ` Sami Tolvanen
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