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Date: Thu, 25 Jan 2024 15:21:46 -0800
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Joe Damato <jdamato@fastly.com>
Cc: linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	chuck.lever@oracle.com, jlayton@kernel.org,
	linux-api@vger.kernel.org, brauner@kernel.org, edumazet@google.com,
	davem@davemloft.net, alexander.duyck@gmail.com,
	sridhar.samudrala@intel.com, kuba@kernel.org,
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	Jonathan Corbet <corbet@lwn.net>,
	Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
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	Steve French <stfrench@microsoft.com>,
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	"open list:DOCUMENTATION" <linux-doc@vger.kernel.org>,
	"open list:FILESYSTEMS (VFS and infrastructure)" <linux-fsdevel@vger.kernel.org>
Subject: Re: [PATCH net-next v3 3/3] eventpoll: Add epoll ioctl for
 epoll_params
Message-ID: <2024012551-anyone-demeaning-867b@gregkh>
References: <20240125225704.12781-1-jdamato@fastly.com>
 <20240125225704.12781-4-jdamato@fastly.com>
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In-Reply-To: <20240125225704.12781-4-jdamato@fastly.com>

On Thu, Jan 25, 2024 at 10:56:59PM +0000, Joe Damato wrote:
> +struct epoll_params {
> +	u64 busy_poll_usecs;
> +	u16 busy_poll_budget;
> +
> +	/* for future fields */
> +	u8 data[118];
> +} EPOLL_PACKED;

variables that cross the user/kernel boundry need to be __u64, __u16,
and __u8 here.

And why 118?

thanks,

greg k-h