linux-kernel - Re: [PATCH] mm/gup_test:fix ioctl fail for compat task

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Date:   Fri, 26 May 2023 21:42:00 +0200
From:   David Hildenbrand <david@...hat.com>
To:     Haibo Li <haibo.li@...iatek.com>, linux-kernel@...r.kernel.org
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>, linux-mm@...ck.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, xiaoming.yu@...iatek.com
Subject: Re: [PATCH] mm/gup_test:fix ioctl fail for compat task

On 26.05.23 04:21, Haibo Li wrote:

Nit: "mm/gup_test: fix ioctl fail for compat task"

> When tools/testing/selftests/mm/gup_test.c is compiled as 32bit,
> then run on arm64 kernel,
> it reports "ioctl: Inappropriate ioctl for device".
> 
> Fix it by filling compat_ioctl in gup_test_fops
> 
> Signed-off-by: Haibo Li <haibo.li@...iatek.com>
> ---
>   mm/gup_test.c | 1 +
>   1 file changed, 1 insertion(+)
> 
> diff --git a/mm/gup_test.c b/mm/gup_test.c
> index 8ae7307a1bb6..c0421b786dcd 100644
> --- a/mm/gup_test.c
> +++ b/mm/gup_test.c
> @@ -381,6 +381,7 @@ static int gup_test_release(struct inode *inode, struct file *file)
>   static const struct file_operations gup_test_fops = {
>   	.open = nonseekable_open,
>   	.unlocked_ioctl = gup_test_ioctl,
> +	.compat_ioctl = compat_ptr_ioctl,
>   	.release = gup_test_release,
>   };
>   

Acked-by: David Hildenbrand <david@...hat.com>

-- 
Thanks,

David / dhildenb