linux-kernel - Re: [PATCH v9 08/13] arm64: traps: Shuffle code to eliminate forward declarations

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Date:   Sat, 14 Mar 2020 11:18:23 +0000
From:   Catalin Marinas <catalin.marinas@....com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Will Deacon <will@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Paul Elliott <paul.elliott@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Yu-cheng Yu <yu-cheng.yu@...el.com>,
        Amit Kachhap <amit.kachhap@....com>,
        Vincenzo Frascino <vincenzo.frascino@....com>,
        Marc Zyngier <maz@...nel.org>,
        Eugene Syromiatnikov <esyr@...hat.com>,
        Szabolcs Nagy <szabolcs.nagy@....com>,
        "H . J . Lu " <hjl.tools@...il.com>,
        Andrew Jones <drjones@...hat.com>,
        Kees Cook <keescook@...omium.org>,
        Arnd Bergmann <arnd@...db.de>, Jann Horn <jannh@...gle.com>,
        Richard Henderson <richard.henderson@...aro.org>,
        Kristina Martšenko <kristina.martsenko@....com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Florian Weimer <fweimer@...hat.com>,
        Sudakshina Das <sudi.das@....com>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        Dave Martin <Dave.Martin@....com>
Subject: Re: [PATCH v9 08/13] arm64: traps: Shuffle code to eliminate forward
 declarations

On Wed, Mar 11, 2020 at 07:26:03PM +0000, Mark Brown wrote:
> diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
> index bc9f4292bfc3..3c07a7074145 100644
> --- a/arch/arm64/kernel/traps.c
> +++ b/arch/arm64/kernel/traps.c
> @@ -272,7 +272,55 @@ void arm64_notify_die(const char *str, struct pt_regs *regs,
>  	}
>  }
>  
> -static void advance_itstate(struct pt_regs *regs);
> +#ifdef CONFIG_COMPAT
> +#define PSTATE_IT_1_0_SHIFT	25
> +#define PSTATE_IT_1_0_MASK	(0x3 << PSTATE_IT_1_0_SHIFT)
> +#define PSTATE_IT_7_2_SHIFT	10
> +#define PSTATE_IT_7_2_MASK	(0x3f << PSTATE_IT_7_2_SHIFT)

[...]

> @@ -578,34 +626,6 @@ static const struct sys64_hook sys64_hooks[] = {
>  	{},
>  };
>  
> -
> -#ifdef CONFIG_COMPAT
> -#define PSTATE_IT_1_0_SHIFT	25
> -#define PSTATE_IT_1_0_MASK	(0x3 << PSTATE_IT_1_0_SHIFT)
> -#define PSTATE_IT_7_2_SHIFT	10
> -#define PSTATE_IT_7_2_MASK	(0x3f << PSTATE_IT_7_2_SHIFT)

This patch breaks the kernel build with CONFIG_COMPAT disabled (e.g. 64K
page configuration) as sys64_hooks[] ends up in the #ifdef/#endif block.

-- 
Catalin