linux-kernel - [PATCH 52/56] drivers/char/virtio: support compiling out splice

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Date:	Thu, 13 Nov 2014 22:23:29 +0100
From:	Pieter Smith <pieter@...sman.nl>
To:	pieter@...sman.nl
Cc:	Josh Triplett <josh@...htriplett.org>,
	Arnd Bergmann <arnd@...db.de>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Amit Shah <amit.shah@...hat.com>,
	virtualization@...ts.linux-foundation.org (open list:VIRTIO CONSOLE
	DR...), linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 52/56] drivers/char/virtio: support compiling out splice

Compile out splice support from virtio character driver 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@...sman.nl>
---
 drivers/char/virtio_console.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/char/virtio_console.c b/drivers/char/virtio_console.c
index b585b47..de5e2cb 100644
--- a/drivers/char/virtio_console.c
+++ b/drivers/char/virtio_console.c
@@ -870,6 +870,7 @@ struct sg_list {
 	struct scatterlist *sg;
 };
 
+#ifdef CONFIG_SYSCALL_SPLICE
 static int pipe_to_sg(struct pipe_inode_info *pipe, struct pipe_buffer *buf,
 			struct splice_desc *sd)
 {
@@ -976,6 +977,7 @@ error_out:
 	pipe_unlock(pipe);
 	return ret;
 }
+#endif /* #ifdef CONFIG_SYSCALL_SPLICE */
 
 static unsigned int port_fops_poll(struct file *filp, poll_table *wait)
 {
@@ -1109,7 +1111,7 @@ static const struct file_operations port_fops = {
 	.open  = port_fops_open,
 	.read  = port_fops_read,
 	.write = port_fops_write,
-	.splice_write = port_fops_splice_write,
+	SPLICE_WRITE_INIT(port_fops_splice_write)
 	.poll  = port_fops_poll,
 	.release = port_fops_release,
 	.fasync = port_fops_fasync,
-- 
1.9.1

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