linux-kernel - Re: [PATCH v4 13/16] percpu: Remove PER_CPU_FIRST

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Date: Sat, 23 Mar 2024 18:17:57 +0100
From: Uros Bizjak <ubizjak@...il.com>
To: Brian Gerst <brgerst@...il.com>
Cc: linux-kernel@...r.kernel.org, x86@...nel.org, 
	Ingo Molnar <mingo@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, Borislav Petkov <bp@...en8.de>, 
	"H . Peter Anvin" <hpa@...or.com>, David.Laight@...lab.com
Subject: Re: [PATCH v4 13/16] percpu: Remove PER_CPU_FIRST_SECTION

On Fri, Mar 22, 2024 at 5:53 PM Brian Gerst <brgerst@...il.com> wrote:
>
> x86-64 was the last user.
>
> Signed-off-by: Brian Gerst <brgerst@...il.com>

Reviewed-by: Uros Bizjak <ubizjak@...il.com>

> ---
>  include/asm-generic/vmlinux.lds.h |  1 -
>  include/linux/percpu-defs.h       | 12 ------------
>  2 files changed, 13 deletions(-)
>
> diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
> index 9752eb420ffa..74f169772778 100644
> --- a/include/asm-generic/vmlinux.lds.h
> +++ b/include/asm-generic/vmlinux.lds.h
> @@ -1033,7 +1033,6 @@
>   */
>  #define PERCPU_INPUT(cacheline)                                                \
>         __per_cpu_start = .;                                            \
> -       *(.data..percpu..first)                                         \
>         . = ALIGN(PAGE_SIZE);                                           \
>         *(.data..percpu..page_aligned)                                  \
>         . = ALIGN(cacheline);                                           \
> diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
> index ec3573119923..b9ddee91e6c7 100644
> --- a/include/linux/percpu-defs.h
> +++ b/include/linux/percpu-defs.h
> @@ -26,13 +26,11 @@
>  #define PER_CPU_SHARED_ALIGNED_SECTION "..shared_aligned"
>  #define PER_CPU_ALIGNED_SECTION "..shared_aligned"
>  #endif
> -#define PER_CPU_FIRST_SECTION "..first"
>
>  #else
>
>  #define PER_CPU_SHARED_ALIGNED_SECTION ""
>  #define PER_CPU_ALIGNED_SECTION "..shared_aligned"
> -#define PER_CPU_FIRST_SECTION ""
>
>  #endif
>
> @@ -114,16 +112,6 @@
>  #define DEFINE_PER_CPU(type, name)                                     \
>         DEFINE_PER_CPU_SECTION(type, name, "")
>
> -/*
> - * Declaration/definition used for per-CPU variables that must come first in
> - * the set of variables.
> - */
> -#define DECLARE_PER_CPU_FIRST(type, name)                              \
> -       DECLARE_PER_CPU_SECTION(type, name, PER_CPU_FIRST_SECTION)
> -
> -#define DEFINE_PER_CPU_FIRST(type, name)                               \
> -       DEFINE_PER_CPU_SECTION(type, name, PER_CPU_FIRST_SECTION)
> -
>  /*
>   * Declaration/definition used for per-CPU variables that must be cacheline
>   * aligned under SMP conditions so that, whilst a particular instance of the
> --
> 2.44.0
>