linux-kernel - [PATCH 0/7] x86: Clean up percpu operations

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Date:   Sun, 17 May 2020 11:29:09 -0400
From:   Brian Gerst <brgerst@...il.com>
To:     linux-kernel@...r.kernel.org, x86@...nel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>, Borislav Petkov <bp@...en8.de>,
        "H . Peter Anvin" <hpa@...or.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Brian Gerst <brgerst@...il.com>
Subject: [PATCH 0/7] x86: Clean up percpu operations

The core percpu operations already have a switch on the width of the
data type, which resulted in an extra amount of dead code being
generated with the x86 operations having another switch.  This patch set
rewrites the x86 ops to remove the switch.  Additional cleanups are to
use named assembly operands, and to cast variables to the width used in
the assembly to make Clang happy.

Brian Gerst (7):
  x86/percpu: Introduce size abstraction macros
  x86/percpu: Clean up percpu_to_op()
  x86/percpu: Clean up percpu_from_op()
  x86/percpu: Clean up percpu_add_op()
  x86/percpu: Clean up percpu_add_return_op()
  x86/percpu: Clean up percpu_xchg_op()
  x86/percpu: Clean up percpu_cmpxchg_op()

 arch/x86/include/asm/percpu.h | 447 ++++++++++++----------------------
 1 file changed, 158 insertions(+), 289 deletions(-)

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2.25.4