linux-kernel - Re: [PATCH RFC 6/7] arm64: kexec: no need to ClearPageReserved()

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Message-ID: <ce6a4c28-3c3b-329e-df01-325294bd9b2e@arm.com>
Date:   Wed, 5 Dec 2018 14:00:35 +0000
From:   James Morse <james.morse@....com>
To:     David Hildenbrand <david@...hat.com>
Cc:     linux-mm@...ck.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-m68k@...ts.linux-m68k.org, linuxppc-dev@...ts.ozlabs.org,
        linux-riscv@...ts.infradead.org, linux-s390@...r.kernel.org,
        linux-mediatek@...ts.infradead.org,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        Bhupesh Sharma <bhsharma@...hat.com>,
        Marc Zyngier <marc.zyngier@....com>,
        Dave Kleikamp <dave.kleikamp@...cle.com>,
        Mark Rutland <mark.rutland@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Michal Hocko <mhocko@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>
Subject: Re: [PATCH RFC 6/7] arm64: kexec: no need to ClearPageReserved()

Hi David,

(CC: +Akashi)

On 05/12/2018 12:28, David Hildenbrand wrote:
> This will already be done by free_reserved_page().

(will already be -> will be ?)

So it does!


> diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c
> index 922add8adb74..0ef4ea73aa54 100644
> --- a/arch/arm64/kernel/machine_kexec.c
> +++ b/arch/arm64/kernel/machine_kexec.c
> @@ -353,7 +353,6 @@ void crash_free_reserved_phys_range(unsigned long begin, unsigned long end)
>  
>  	for (addr = begin; addr < end; addr += PAGE_SIZE) {
>  		page = phys_to_page(addr);
> -		ClearPageReserved(page);
>  		free_reserved_page(page);
>  	}
>  }
> 

Acked-by: James Morse <james.morse@....com>


Thanks,

James