linux-ext4 - Re: [PATCH 12/29] fsdax: remove a pointless __force cast in copy_cow_page

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Date:   Tue, 23 Nov 2021 14:33:26 -0800
From:   "Darrick J. Wong" <djwong@...nel.org>
To:     Christoph Hellwig <hch@....de>
Cc:     Dan Williams <dan.j.williams@...el.com>,
        Mike Snitzer <snitzer@...hat.com>,
        Ira Weiny <ira.weiny@...el.com>, dm-devel@...hat.com,
        linux-xfs@...r.kernel.org, nvdimm@...ts.linux.dev,
        linux-s390@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-erofs@...ts.ozlabs.org, linux-ext4@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Subject: Re: [PATCH 12/29] fsdax: remove a pointless __force cast in
 copy_cow_page_dax

On Tue, Nov 09, 2021 at 09:32:52AM +0100, Christoph Hellwig wrote:
> Despite its name copy_user_page expected kernel addresses, which is what
> we already have.
> 
> Signed-off-by: Christoph Hellwig <hch@....de>

Looks ok,
Reviewed-by: Darrick J. Wong <djwong@...nel.org>

--D

> ---
>  fs/dax.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/dax.c b/fs/dax.c
> index 4e3e5a283a916..73bd1439d8089 100644
> --- a/fs/dax.c
> +++ b/fs/dax.c
> @@ -728,7 +728,7 @@ static int copy_cow_page_dax(struct block_device *bdev, struct dax_device *dax_d
>  		return rc;
>  	}
>  	vto = kmap_atomic(to);
> -	copy_user_page(vto, (void __force *)kaddr, vaddr, to);
> +	copy_user_page(vto, kaddr, vaddr, to);
>  	kunmap_atomic(vto);
>  	dax_read_unlock(id);
>  	return 0;
> -- 
> 2.30.2
>