linux-kernel - Re: [PATCH v2 1/2] mm: fix the pfn calculation mistake in __ioremap_check

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Message-ID: <87sg1bfxqc.ffs@nanos.tec.linutronix.de>
Date:   Mon, 21 Jun 2021 10:06:19 +0200
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Yaohui Wang <yaohuiwang@...ux.alibaba.com>,
        dave.hansen@...ux.intel.com
Cc:     luto@...nel.org, peterz@...radead.org, mingo@...hat.com,
        bp@...en8.de, x86@...nel.org, linux-kernel@...r.kernel.org,
        Ben Luo <luoben@...ux.alibaba.com>,
        Yahui Wang <yaohuiwang@...ux.alibaba.com>
Subject: Re: [PATCH v2 1/2] mm: fix the pfn calculation mistake in __ioremap_check_ram

On Sat, Jun 19 2021 at 23:22, Thomas Gleixner wrote:
> Please make that:
>
>        start_pfn = PFN_DOWN(res->start);
>        stop_pfn = PFN_UP(res->end);

That should obviously be PFN_DOWN(res->end) as well.