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From: Nick Desaulniers <ndesaulniers@google.com>
To: Masahiro Yamada <masahiroy@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
	"David S . Miller" <davem@davemloft.net>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Kees Cook <keescook@chromium.org>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	Herbert Xu <herbert@gondor.apana.org.au>,
	"open list:HARDWARE RANDOM NUMBER GENERATOR CORE" 
	<linux-crypto@vger.kernel.org>, Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Borislav Petkov <bp@alien8.de>,
	Peter Zijlstra <peterz@infradead.org>,
	"H . Peter Anvin" <hpa@zytor.com>,
	"maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)"
	<x86@kernel.org>,
	Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>
Subject: Re: [PATCH 04/16] x86: remove unneeded (CONFIG_AS_)CFI_SIGNAL_FRAME
Date: Tue, 24 Mar 2020 09:41:24 -0700	[thread overview]
Message-ID: <CAKwvOd=3tm+OQhuyM9SzC1Mo6QWphLWipd-=VBRYzEmMC6Bg=A@mail.gmail.com> (raw)
In-Reply-To: <20200324084821.29944-5-masahiroy@kernel.org>

On Tue, Mar 24, 2020 at 1:49 AM Masahiro Yamada <masahiroy@kernel.org> wrote:
>
> Commit 131484c8da97 ("x86/debug: Remove perpetually broken,
> unmaintainable dwarf annotations") removes all the users of
> CFI_SIGNAL_FRAME.
>
> Remove the CFI_SIGNAL_FRAME and CONFIG_AS_CFI_SIGNAL_FRAME.
>
> Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
> Acked-by: Jason A. Donenfeld <Jason@zx2c4.com>

Please remember to clean up the reference to
CONFIG_AS_CFI_SIGNAL_FRAME in arch/arc/kernel/unwind.c.  It was not
defined by any Makefile scoped to arch/arc, so the the ifndef guards
can go, but the code they guard should stay.
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>

> ---
>
>  arch/x86/Makefile             | 6 ++----
>  arch/x86/include/asm/dwarf2.h | 6 ------
>  2 files changed, 2 insertions(+), 10 deletions(-)
>
> diff --git a/arch/x86/Makefile b/arch/x86/Makefile
> index 72f8f744ebd7..dd275008fc59 100644
> --- a/arch/x86/Makefile
> +++ b/arch/x86/Makefile
> @@ -177,8 +177,6 @@ ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1)
>         KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,)
>  endif
>
> -# is .cfi_signal_frame supported too?
> -cfi-sigframe := $(call as-instr,.cfi_startproc\n.cfi_signal_frame\n.cfi_endproc,-DCONFIG_AS_CFI_SIGNAL_FRAME=1)
>  cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTIONS=1)
>
>  # does binutils support specific instructions?
> @@ -190,8 +188,8 @@ sha1_ni_instr :=$(call as-instr,sha1msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA1_NI=
>  sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA256_NI=1)
>  adx_instr := $(call as-instr,adox %r10$(comma)%r10,-DCONFIG_AS_ADX=1)
>
> -KBUILD_AFLAGS += $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr)
> -KBUILD_CFLAGS += $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr)
> +KBUILD_AFLAGS += $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr)
> +KBUILD_CFLAGS += $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) $(adx_instr)
>
>  KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE)
>
> diff --git a/arch/x86/include/asm/dwarf2.h b/arch/x86/include/asm/dwarf2.h
> index 90807583cad7..f440790f09f9 100644
> --- a/arch/x86/include/asm/dwarf2.h
> +++ b/arch/x86/include/asm/dwarf2.h
> @@ -21,12 +21,6 @@
>  #define CFI_UNDEFINED          .cfi_undefined
>  #define CFI_ESCAPE             .cfi_escape
>
> -#ifdef CONFIG_AS_CFI_SIGNAL_FRAME
> -#define CFI_SIGNAL_FRAME       .cfi_signal_frame
> -#else
> -#define CFI_SIGNAL_FRAME
> -#endif
> -
>  #if defined(CONFIG_AS_CFI_SECTIONS)
>  #ifndef BUILD_VDSO
>         /*
> --
> 2.17.1
>
> --
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-- 
Thanks,
~Nick Desaulniers

  reply	other threads:[~2020-03-24 16:41 UTC|newest]

Thread overview: 34+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-24  8:48 [PATCH 00/16] x86, crypto: remove always-defined CONFIG_AS_* and cosolidate Kconfig/Makefiles Masahiro Yamada
2020-03-24  8:48 ` [PATCH 01/16] lib/raid6/test: fix build on distros whose /bin/sh is not bash Masahiro Yamada
2020-03-24 16:36   ` Nick Desaulniers
2020-03-26  6:48     ` Masahiro Yamada
2020-03-26 17:27       ` Nick Desaulniers
2020-03-24  8:48 ` [PATCH 02/16] x86: remove unneeded defined(__ASSEMBLY__) check from asm/dwarf2.h Masahiro Yamada
2020-03-24 16:43   ` Nick Desaulniers
2020-03-24  8:48 ` [PATCH 03/16] x86: remove always-defined CONFIG_AS_CFI Masahiro Yamada
2020-03-24  8:48 ` [PATCH 04/16] x86: remove unneeded (CONFIG_AS_)CFI_SIGNAL_FRAME Masahiro Yamada
2020-03-24 16:41   ` Nick Desaulniers [this message]
2020-03-24  8:48 ` [PATCH 05/16] x86: remove always-defined CONFIG_AS_CFI_SECTIONS Masahiro Yamada
2020-03-24  8:48 ` [PATCH 06/16] x86: remove always-defined CONFIG_AS_SSSE3 Masahiro Yamada
2020-03-24 16:56   ` Nick Desaulniers
2020-03-24  8:48 ` [PATCH 07/16] x86: remove always-defined CONFIG_AS_AVX Masahiro Yamada
2020-03-24  8:48 ` [PATCH 08/16] x86: add comments about the binutils version to support code in as-instr Masahiro Yamada
2020-03-24  8:48 ` [PATCH 09/16] x86: replace arch macros from compiler with CONFIG_X86_{32,64} Masahiro Yamada
2020-03-24  8:48 ` [PATCH 10/16] drm/i915: remove always-defined CONFIG_AS_MOVNTDQA Masahiro Yamada
2020-03-24  8:48 ` [PATCH 11/16] x86: probe assembler capabilities via kconfig instead of makefile Masahiro Yamada
2020-03-24 17:01   ` Nick Desaulniers
2020-03-24 17:17     ` Jason A. Donenfeld
2020-03-24 17:21       ` Masahiro Yamada
2020-03-24 17:33       ` Nick Desaulniers
2020-03-24  8:48 ` [PATCH 12/16] crypto: x86 - rework configuration based on Kconfig Masahiro Yamada
2020-03-24 11:54   ` Herbert Xu
2020-03-24  8:48 ` [PATCH 13/16] crypto: curve25519 - do not pollute dispatcher based on assembler Masahiro Yamada
2020-03-24 11:54   ` Herbert Xu
2020-03-24  8:48 ` [PATCH 14/16] Documentation/changes: Raise minimum supported binutils version to 2.23 Masahiro Yamada
2020-03-24  8:48 ` [PATCH 15/16] x86: update AS_* macros to binutils >=2.23, supporting ADX and AVX2 Masahiro Yamada
2020-03-24  8:48 ` [PATCH 16/16] crypto: x86 - clean up poly1305-x86_64-cryptogams.S by 'make clean' Masahiro Yamada
2020-03-24 11:55   ` Herbert Xu
2020-03-24 16:51 ` [PATCH 00/16] x86, crypto: remove always-defined CONFIG_AS_* and cosolidate Kconfig/Makefiles Linus Torvalds
2020-03-25  4:59 ` Ingo Molnar
2020-03-25  5:09   ` Masahiro Yamada
2020-03-26  9:20     ` Ingo Molnar

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