Subject: [PATCH v2 3/3] arm64: mm: Restrictive printing for modules and PCI I/O in memory layout

From: [email-masked] (James Morse)
Date: Mon, 18 Apr 2016 12:15:26 +0100

On 18/04/16 04:09, Kefeng Wang wrote:
> The modules and PCI I/O informations in Virtual kernel memory layout
> are inappropriate when corresponding config is not enabled, so don't
> show them then.

I'm not sure about this, it looks like these areas are still reserved, so this
is still useful debug information. mm/dump.c will still print any mappings in
these ranges, its good to be consistent.

Thanks,

James

> ---
>  arch/arm64/mm/init.c | 4 ++++
>  1 file changed, 4 insertions(+)
> 
> diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
> index c96fe51..e06a445 100644
> --- a/arch/arm64/mm/init.c
> +++ b/arch/arm64/mm/init.c
> @@ -367,8 +367,10 @@ void __init mem_init(void)
>  	pr_cont("    kasan   : 0x%16lx - 0x%16lx   (%6ld GB)\n",
>  		MLG(KASAN_SHADOW_START, KASAN_SHADOW_END));
>  #endif
> +#ifdef CONFIG_MODULES
>  	pr_cont("    modules : 0x%16lx - 0x%16lx   (%6ld MB)\n",
>  		MLM(MODULES_VADDR, MODULES_END));
> +#endif
>  	pr_cont("    vmalloc : 0x%16lx - 0x%16lx   (%6ld GB)\n",
>  		MLG(VMALLOC_START, VMALLOC_END));
>  	pr_cont("      .text : 0x%p" " - 0x%p" "   (%6ld KB)\n",
> @@ -390,8 +392,10 @@ void __init mem_init(void)
>  #endif
>  	pr_cont("    fixed   : 0x%16lx - 0x%16lx   (%6ld KB)\n",
>  		MLK(FIXADDR_START, FIXADDR_TOP));
> +#ifdef CONFIG_PCI
>  	pr_cont("    PCI I/O : 0x%16lx - 0x%16lx   (%6ld MB)\n",
>  		MLM(PCI_IO_START, PCI_IO_END));
> +#endif
>  	pr_cont("    memory  : 0x%16lx - 0x%16lx   (%6ld MB)\n",
>  		MLM(__phys_to_virt(memblock_start_of_DRAM()),
>  		    (unsigned long)high_memory));
>