linux-kernel - Re: [RFC PATCH 5/5] arm: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef

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Date:   Fri, 3 Dec 2021 17:39:51 +0100
From:   Emil Renner Berthing <emil.renner.berthing@...il.com>
To:     Jisheng Zhang <jszhang@...nel.org>
Cc:     Russell King <linux@...linux.org.uk>,
        Catalin Marinas <catalin.marinas@....com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Will Deacon <will@...nel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        hpa@...or.com, Eric Biederman <ebiederm@...ssion.com>,
        Alexandre Ghiti <alex@...ti.fr>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        kexec@...ts.infradead.org
Subject: Re: [RFC PATCH 5/5] arm: use IS_ENABLED(CONFIG_KEXEC_CORE) instead of #ifdef

Hi Jisheng,

On Fri, 3 Dec 2021 at 06:22, Jisheng Zhang <jszhang@...nel.org> wrote:
> Replace the conditional compilation using "#ifdef CONFIG_KEXEC_CORE"
> by a check for "IS_ENABLED(CONFIG_BLK_DEV_INITRD)", to simplify the

The patch looks fine, but I think you mean
IS_ENABLED(CONFIG_KEXEC_CORE) here, not CONFIG_BLK_DEV_INITRD.

/Emil

> code and increase compile coverage.
>
> Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
> ---
>  arch/arm/kernel/setup.c | 7 +++----
>  1 file changed, 3 insertions(+), 4 deletions(-)
>
> diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
> index 284a80c0b6e1..f9a054a344c0 100644
> --- a/arch/arm/kernel/setup.c
> +++ b/arch/arm/kernel/setup.c
> @@ -973,7 +973,6 @@ static int __init init_machine_late(void)
>  }
>  late_initcall(init_machine_late);
>
> -#ifdef CONFIG_KEXEC
>  /*
>   * The crash region must be aligned to 128MB to avoid
>   * zImage relocating below the reserved region.
> @@ -1001,6 +1000,9 @@ static void __init reserve_crashkernel(void)
>         unsigned long long total_mem;
>         int ret;
>
> +       if (!IS_ENABLED(CONFIG_KEXEC_CORE))
> +               return;
> +
>         total_mem = get_total_mem();
>         ret = parse_crashkernel(boot_command_line, total_mem,
>                                 &crash_size, &crash_base);
> @@ -1056,9 +1058,6 @@ static void __init reserve_crashkernel(void)
>                 insert_resource(&iomem_resource, &crashk_boot_res);
>         }
>  }
> -#else
> -static inline void reserve_crashkernel(void) {}
> -#endif /* CONFIG_KEXEC */
>
>  void __init hyp_mode_check(void)
>  {
> --
> 2.34.1
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@...ts.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv

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