linux-kernel - [PATCH 46/56] kernel/relay: support compiling out splice

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Message-Id: <1415913813-362-47-git-send-email-pieter@boesman.nl>
Date:	Thu, 13 Nov 2014 22:23:23 +0100
From:	Pieter Smith <pieter@...sman.nl>
To:	pieter@...sman.nl
Cc:	Josh Triplett <josh@...htriplett.org>,
	Al Viro <viro@...iv.linux.org.uk>,
	Jiri Kosina <jkosina@...e.cz>,
	Masanari Iida <standby24x7@...il.com>,
	Randy Dunlap <rdunlap@...radead.org>,
	linux-kernel@...r.kernel.org (open list)
Subject: [PATCH 46/56] kernel/relay: support compiling out splice

Compile out splice support from relay 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>
---
 kernel/relay.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/kernel/relay.c b/kernel/relay.c
index 5a56d3c..fed90ca 100644
--- a/kernel/relay.c
+++ b/kernel/relay.c
@@ -1201,6 +1201,7 @@ static const struct pipe_buf_operations relay_pipe_buf_ops = {
 	.get = generic_pipe_buf_get,
 };
 
+#ifdef CONFIG_SYSCALL_SPLICE
 static void relay_page_release(struct splice_pipe_desc *spd, unsigned int i)
 {
 }
@@ -1338,6 +1339,7 @@ static ssize_t relay_file_splice_read(struct file *in,
 
 	return ret;
 }
+#endif /* #ifdef CONFIG_SYSCALL_SPLICE */
 
 const struct file_operations relay_file_operations = {
 	.open		= relay_file_open,
@@ -1346,7 +1348,7 @@ const struct file_operations relay_file_operations = {
 	.read		= relay_file_read,
 	.llseek		= no_llseek,
 	.release	= relay_file_release,
-	.splice_read	= relay_file_splice_read,
+	SPLICE_READ_INIT(relay_file_splice_read)
 };
 EXPORT_SYMBOL_GPL(relay_file_operations);
 
-- 
1.9.1

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