linux-kernel - [PATCH 0/4] MIPS: Introduce isa-rev.h to define MIPS_ISA

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Date:   Mon, 26 Feb 2018 17:02:41 +0000
From:   Matt Redfearn <matt.redfearn@...s.com>
To:     James Hogan <jhogan@...nel.org>, Ralf Baechle <ralf@...ux-mips.org>
CC:     <linux-mips@...ux-mips.org>, Paul Burton <paul.burton@...s.com>,
        "Matt Redfearn" <matt.redfearn@...s.com>,
        <linux-kernel@...r.kernel.org>,
        "Maciej W. Rozycki" <macro@...s.com>,
        David Daney <david.daney@...ium.com>
Subject: [PATCH 0/4] MIPS: Introduce isa-rev.h to define MIPS_ISA_REV

There are multiple instances in the kernel where we need to include or
exclude particular instructions based on the ISA revision of the target
processor. For MIPS32 / MIPS64, the compiler exports a __mips_isa_rev
define. However, when targeting MIPS I - V, this define is absent. This
leads to each use of __mips_isa_rev having to check that it is defined
first. To simplify this, this series introduces the isa-rev.h header
which always exports MIPS_ISA_REV (the name is changed so as to avoid
confusion with the compiler builtin and to avoid accidentally using the
builtin). All uses of __mips_isa_rev are then replaced with the new
define, removing the check that it is defined.

Applies on v4.16-rc1

Matt Redfearn (4):
  MIPS: Introduce isa-rev.h to define MIPS_ISA_REV
  MIPS: cpu-features.h: Replace __mips_isa_rev with MIPS_ISA_REV
  MIPS: BPF: Replace __mips_isa_rev with MIPS_ISA_REV
  MIPS: VDSO: Replace __mips_isa_rev with MIPS_ISA_REV

 arch/mips/include/asm/cpu-features.h |  5 +++--
 arch/mips/include/asm/isa-rev.h      | 24 ++++++++++++++++++++++++
 arch/mips/net/bpf_jit_asm.S          |  9 +++++----
 arch/mips/vdso/elf.S                 | 10 ++++------
 4 files changed, 36 insertions(+), 12 deletions(-)
 create mode 100644 arch/mips/include/asm/isa-rev.h

-- 
2.7.4