linux-kernel - Re: [PATCH 1/3] arm64:add missing CONFIG_STRICT_KERNEL_RWX for mark_rodata

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Message-ID: <20180529092133.GA6533@arm.com>
Date:   Tue, 29 May 2018 10:21:34 +0100
From:   Will Deacon <will.deacon@....com>
To:     nixiaoming <nixiaoming@...wei.com>
Cc:     catalin.marinas@....com, ard.biesheuvel@...aro.org,
        marc.zyngier@....com, james.morse@....com,
        kristina.martsenko@....com, steve.capper@....com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/3] arm64:add missing CONFIG_STRICT_KERNEL_RWX for
 mark_rodata_ro


On Mon, May 28, 2018 at 11:33:53AM +0800, nixiaoming wrote:
> Signed-off-by: nixiaoming <nixiaoming@...wei.com>

Please can you write a commit message explaining what this fixes and also
give me a pointer to patches 2 and 3 from this series?

Will

> ---
>  arch/arm64/mm/mmu.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c
> index 2dbb2c9..849f326 100644
> --- a/arch/arm64/mm/mmu.c
> +++ b/arch/arm64/mm/mmu.c
> @@ -491,6 +491,7 @@ static void __init map_mem(pgd_t *pgdp)
>  #endif
>  }
>  
> +#ifdef CONFIG_STRICT_KERNEL_RWX
>  void mark_rodata_ro(void)
>  {
>  	unsigned long section_size;
> @@ -505,6 +506,7 @@ void mark_rodata_ro(void)
>  
>  	debug_checkwx();
>  }
> +#endif
>  
>  static void __init map_kernel_segment(pgd_t *pgdp, void *va_start, void *va_end,
>  				      pgprot_t prot, struct vm_struct *vma,
> -- 
> 2.10.1
>