linux-kernel - Re: [PATCH 3/5] powerpc/xive: remove unnecessary unmap_kernel

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Message-ID: <336902f4-58e6-0240-fe7a-ec06a45e118e@kaod.org>
Date:   Tue, 26 Jan 2021 08:25:36 +0100
From:   Cédric Le Goater <clg@...d.org>
To:     Nicholas Piggin <npiggin@...il.com>, <linux-mm@...ck.org>,
        Andrew Morton <akpm@...ux-foundation.org>
CC:     <linux-kernel@...r.kernel.org>, Christoph Hellwig <hch@....de>,
        <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH 3/5] powerpc/xive: remove unnecessary unmap_kernel_range

On 1/26/21 5:54 AM, Nicholas Piggin wrote:
> iounmap will remove ptes.
> 
> Cc: "Cédric Le Goater" <clg@...d.org>
> Cc: linuxppc-dev@...ts.ozlabs.org
> Signed-off-by: Nicholas Piggin <npiggin@...il.com>

Looks good. 

Acked-by: Cédric Le Goater <clg@...d.org>

Thanks,

C. 

> ---
>  arch/powerpc/sysdev/xive/common.c | 4 ----
>  1 file changed, 4 deletions(-)
> 
> diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c
> index 595310e056f4..d6c2069cc828 100644
> --- a/arch/powerpc/sysdev/xive/common.c
> +++ b/arch/powerpc/sysdev/xive/common.c
> @@ -959,16 +959,12 @@ EXPORT_SYMBOL_GPL(is_xive_irq);
>  void xive_cleanup_irq_data(struct xive_irq_data *xd)
>  {
>  	if (xd->eoi_mmio) {
> -		unmap_kernel_range((unsigned long)xd->eoi_mmio,
> -				   1u << xd->esb_shift);
>  		iounmap(xd->eoi_mmio);
>  		if (xd->eoi_mmio == xd->trig_mmio)
>  			xd->trig_mmio = NULL;
>  		xd->eoi_mmio = NULL;
>  	}
>  	if (xd->trig_mmio) {
> -		unmap_kernel_range((unsigned long)xd->trig_mmio,
> -				   1u << xd->esb_shift);
>  		iounmap(xd->trig_mmio);
>  		xd->trig_mmio = NULL;
>  	}
>