[PATCH 54/56] net/ipv4: support compiling out splice

[Pieter Smith <pieter@boesman.nl>]

Compile out splice support from ipv4 networking when the splice-family of
syscalls is not supported by the system (i.e. CONFIG_SYSCALL_SPLICE is
undefined).

Signed-off-by: Pieter Smith <pieter@boesman.nl>
---
 net/ipv4/af_inet.c | 2 +-
 net/ipv4/tcp.c     | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index d156b3c..e025478 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -917,7 +917,7 @@ const struct proto_ops inet_stream_ops = {
 	.recvmsg	   = inet_recvmsg,
 	.mmap		   = sock_no_mmap,
 	.sendpage	   = inet_sendpage,
-	.splice_read	   = tcp_splice_read,
+	SPLICE_READ_INIT(tcp_splice_read)
 #ifdef CONFIG_COMPAT
 	.compat_setsockopt = compat_sock_common_setsockopt,
 	.compat_getsockopt = compat_sock_common_getsockopt,
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 541f26a..afc825f 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -686,6 +686,7 @@ static void tcp_push(struct sock *sk, int flags, int mss_now,
 	__tcp_push_pending_frames(sk, mss_now, nonagle);
 }
 
+#ifdef CONFIG_SYSCALL_SPLICE
 static int tcp_splice_data_recv(read_descriptor_t *rd_desc, struct sk_buff *skb,
 				unsigned int offset, size_t len)
 {
@@ -805,6 +806,7 @@ ssize_t tcp_splice_read(struct socket *sock, loff_t *ppos,
 	return ret;
 }
 EXPORT_SYMBOL(tcp_splice_read);
+#endif /* #ifdef CONFIG_SYSCALL_SPLICE */
 
 struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp)
 {
-- 
1.9.1