linux-kernel - [PATCH 0/7] x86: remove always-defined CONFIG_AS

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Message-Id: <20200323020844.17064-1-masahiroy@kernel.org>
Date:   Mon, 23 Mar 2020 11:08:37 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     x86@...nel.org, Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>
Cc:     linux-kernel@...r.kernel.org,
        "Jason A . Donenfeld" <Jason@...c4.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Allison Randal <allison@...utok.net>,
        Armijn Hemel <armijn@...ldur.nl>,
        "David S. Miller" <davem@...emloft.net>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Ingo Molnar <mingo@...hat.com>,
        Kate Stewart <kstewart@...uxfoundation.org>,
        Song Liu <songliubraving@...com>,
        Zhengyuan Liu <liuzhengyuan@...inos.cn>,
        clang-built-linux@...glegroups.com, linux-crypto@...r.kernel.org
Subject: [PATCH 0/7] x86: remove always-defined CONFIG_AS_* options

arch/x86/Makefile tests instruction code by $(call as-instr, ...)

Some of them are very old.
For example, the check for CONFIG_AS_CFI dates back to 2006.

We raise GCC versions from time to time, and we clean old code away.
The same policy applied to binutils.

The current minimal supported version of binutils is 2.21

This is new enough to recognize the instruction in most of
as-instr calls.



Masahiro Yamada (7):
  x86: remove unneeded defined(__ASSEMBLY__) check from asm/dwarf2.h
  x86: remove always-defined CONFIG_AS_CFI
  x86: remove always-defined CONFIG_AS_CFI_SIGNAL_FRAME
  x86: remove always-defined CONFIG_AS_CFI_SECTIONS
  x86: remove always-defined CONFIG_AS_SSSE3
  x86: remove always-defined CONFIG_AS_AVX
  x86: add comments about the binutils version to support code in
    as-instr

 arch/x86/Makefile                             | 21 +++------
 arch/x86/crypto/Makefile                      | 32 ++++++--------
 arch/x86/crypto/aesni-intel_avx-x86_64.S      |  3 --
 arch/x86/crypto/aesni-intel_glue.c            | 14 +-----
 arch/x86/crypto/blake2s-core.S                |  2 -
 arch/x86/crypto/poly1305-x86_64-cryptogams.pl |  8 ----
 arch/x86/crypto/poly1305_glue.c               |  6 +--
 arch/x86/crypto/sha1_ssse3_asm.S              |  4 --
 arch/x86/crypto/sha1_ssse3_glue.c             |  9 +---
 arch/x86/crypto/sha256-avx-asm.S              |  3 --
 arch/x86/crypto/sha256_ssse3_glue.c           |  8 +---
 arch/x86/crypto/sha512-avx-asm.S              |  2 -
 arch/x86/crypto/sha512_ssse3_glue.c           |  7 +--
 arch/x86/include/asm/dwarf2.h                 | 43 -------------------
 arch/x86/include/asm/xor_avx.h                |  9 ----
 lib/raid6/algos.c                             |  2 -
 lib/raid6/recov_ssse3.c                       |  6 ---
 lib/raid6/test/Makefile                       |  3 --
 18 files changed, 26 insertions(+), 156 deletions(-)

-- 
2.17.1