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Message-ID: <20201030165556.GA1097@sol.localdomain>
Date:   Fri, 30 Oct 2020 09:55:56 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Chao Yu <yuchao0@...wei.com>
Cc:     jaegeuk@...nel.org, linux-kernel@...r.kernel.org,
        linux-f2fs-devel@...ts.sourceforge.net
Subject: Re: [f2fs-dev] [PATCH v2] f2fs: move ioctl interface definitions to
 separated file

On Fri, Oct 30, 2020 at 03:26:10PM +0800, Chao Yu wrote:
> +
> +struct f2fs_gc_range {
> +	u32 sync;
> +	u64 start;
> +	u64 len;
> +};

Userspace headers need to use __u32, __u64, etc. instead of u32, u64, etc.

Did you try installing this header, and including it in a userspace program?

- Eric

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