Remove splice_to_pipe kallsyms wrapper

[lttng-modules.git] / src / wrapper / splice.c

diff --git a/src/wrapper/splice.c b/src/wrapper/splice.c
deleted file mode 100644 (file)
index 51b9673..0000000
--- a/src/wrapper/splice.c
+++ /dev/null
@@ -1,64 +0,0 @@
-/* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only)
- *
- * wrapper/splice.c
- *
- * wrapper around splice_to_pipe. Using KALLSYMS to get its address when
- * available, else we need to have a kernel that exports this function to GPL
- * modules. The export was introduced in kernel 4.2.
- *
- * Copyright (C) 2011-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- */
-
-#include <lttng/kernel-version.h>
-
-#ifdef CONFIG_KALLSYMS
-
-#include <linux/kallsyms.h>
-#include <linux/fs.h>
-#include <linux/splice.h>
-#include <wrapper/kallsyms.h>
-
-static
-ssize_t (*splice_to_pipe_sym)(struct pipe_inode_info *pipe,
-                             struct splice_pipe_desc *spd);
-
-ssize_t wrapper_splice_to_pipe(struct pipe_inode_info *pipe,
-                              struct splice_pipe_desc *spd)
-{
-       if (!splice_to_pipe_sym)
-               splice_to_pipe_sym = (void *) kallsyms_lookup_funcptr("splice_to_pipe");
-       if (splice_to_pipe_sym) {
-               return splice_to_pipe_sym(pipe, spd);
-       } else {
-               printk_once(KERN_WARNING "LTTng: splice_to_pipe symbol lookup failed.\n");
-               return -ENOSYS;
-       }
-}
-
-/*
- * Canary function to check for 'splice_to_pipe()' at compile time.
- *
- * From 'include/linux/splice.h':
- *
- *   extern ssize_t splice_to_pipe(struct pipe_inode_info *,
- *                                 struct splice_pipe_desc *spd);
- */
-__attribute__((unused)) static
-ssize_t __canary__splice_to_pipe(struct pipe_inode_info *pipe,
-                               struct splice_pipe_desc *spd)
-{
-       return splice_to_pipe(pipe, spd);
-}
-
-#else
-
-#include <linux/fs.h>
-#include <linux/splice.h>
-
-ssize_t wrapper_splice_to_pipe(struct pipe_inode_info *pipe,
-                              struct splice_pipe_desc *spd)
-{
-       return splice_to_pipe(pipe, spd);
-}
-
-#endif