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Subjectlinux-next: build failure after merge of the net-next tree
Hi all,

After merging the net-next tree, today's linux-next build (x86_64
allmodconfig) failed like this:

net/xdp/xsk.c: In function 'xsk_poll':
net/xdp/xsk.c:207:22: error: implicit declaration of function 'datagram_poll'; did you mean 'datagram_poll_mask'? [-Werror=implicit-function-declaration]
unsigned int mask = datagram_poll(file, sock, wait);

Caused by commit

c497176cb2e4 ("xsk: add Rx receive functions and poll support")

interacting with commit

db5051ead64a ("net: convert datagram_poll users tp ->poll_mask")

from the vfs tree.

[Christoph, I noticed that the comment above datagram_poll in
net/core/datagram.c needs the function name updated]

I have added the following merge fix patch for today:

From: Stephen Rothwell <>
Date: Tue, 29 May 2018 13:34:25 +1000
Subject: [PATCH] xsk: update for "net: convert datagram_poll users tp->poll_mask"

Signed-off-by: Stephen Rothwell <>
net/xdp/xsk.c | 7 +++----
1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index cce0e4f8a536..4ee140afbc61 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -201,10 +201,9 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
return xsk_generic_xmit(sk, m, total_len);

-static unsigned int xsk_poll(struct file *file, struct socket *sock,
- struct poll_table_struct *wait)
+static __poll_t xsk_poll_mask(struct socket *sock, __poll_t events)
- unsigned int mask = datagram_poll(file, sock, wait);
+ __poll_t mask = datagram_poll_mask(sock, events);
struct sock *sk = sock->sk;
struct xdp_sock *xs = xdp_sk(sk);

@@ -580,7 +579,7 @@ static const struct proto_ops xsk_proto_ops = {
.socketpair = sock_no_socketpair,
.accept = sock_no_accept,
.getname = sock_no_getname,
- .poll = xsk_poll,
+ .poll_mask = xsk_poll_mask,
.ioctl = sock_no_ioctl,
.listen = sock_no_listen,
.shutdown = sock_no_shutdown,
Stephen Rothwell
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