From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH 04/31] net: add support for ->poll_mask in proto_ops
Date: Tue, 9 Jan 2018 17:32:37 +0100
Message-ID: <20180109163237.GA11540@lst.de>
References: <20180104080043.14506-1-hch@lst.de> <20180104080043.14506-5-hch@lst.de> <20180106191622.GJ21978@ZenIV.linux.org.uk>
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Cc: Christoph Hellwig <hch@lst.de>, Avi Kivity <avi@scylladb.com>,
        linux-aio@kvack.org, linux-fsdevel@vger.kernel.org,
        netdev@vger.kernel.org, linux-kernel@vger.kernel.org
To: Al Viro <viro@ZenIV.linux.org.uk>
Return-path: <linux-kernel-owner@vger.kernel.org>
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In-Reply-To: <20180106191622.GJ21978@ZenIV.linux.org.uk>
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On Sat, Jan 06, 2018 at 07:16:22PM +0000, Al Viro wrote:
> > +	__poll_t	(*poll_mask) (struct file *file, struct socket *sock,
> > +				      __poll_t events);
> 
> Does that sucker need struct file?

It turns out udp needs it:

	/* Check for false positives due to checksum errors */
	if ((mask & POLLRDNORM) && !(file->f_flags & O_NONBLOCK) &&
	    !(sk->sk_shutdown & RCV_SHUTDOWN) && first_packet_length(sk) == -1)
		mask &= ~(POLLIN | POLLRDNORM);