projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 5dd620fa MD |
1 | /* |
| 2 | * Copyright (C) 2011 Mathieu Desnoyers (mathieu.desnoyers@efficios.com) | |
| 3 | * | |
| 4 | * wrapper around vmalloc_sync_all. Using KALLSYMS to get its address when | |
| 5 | * available, else we need to have a kernel that exports this function to GPL | |
| 6 | * modules. | |
| 7 | * | |
| 8 | * Dual LGPL v2.1/GPL v2 license. | |
| 9 | */ | |
| 10 | ||
| 11 | #ifdef CONFIG_KALLSYMS | |
| 12 | ||
| 13 | #include <linux/kallsyms.h> | |
| 14 | #include <linux/fs.h> | |
| 15 | #include <linux/splice.h> | |
| 16 | ||
| 17 | static | |
| 18 | ssize_t (*splice_to_pipe_sym)(struct pipe_inode_info *pipe, | |
| 19 | struct splice_pipe_desc *spd); | |
| 20 | ||
| 21 | ssize_t wrapper_splice_to_pipe(struct pipe_inode_info *pipe, | |
| 22 | struct splice_pipe_desc *spd) | |
| 23 | { | |
| 24 | if (!splice_to_pipe_sym) | |
| 25 | splice_to_pipe_sym = (void *) kallsyms_lookup_name("splice_to_pipe"); | |
| 26 | if (splice_to_pipe_sym) { | |
| 27 | return splice_to_pipe_sym(pipe, spd); | |
| 28 | } else { | |
| 29 | printk(KERN_WARNING "LTTng: splice_to_pipe symbol lookup failed.\n"); | |
| 30 | return -ENOSYS; | |
| 31 | } | |
| 32 | } | |
| 33 | ||
| 34 | #else | |
| 35 | ||
| 36 | #include <linux/fs.h> | |
| 37 | #include <linux/splice.h> | |
| 38 | ||
| 39 | ssize_t wrapper_splice_to_pipe(struct pipe_inode_info *pipe, | |
| 40 | struct splice_pipe_desc *spd) | |
| 41 | { | |
| 42 | return splice_to_pipe(pipe, spd); | |
| 43 | } | |
| 44 | ||
| 45 | #endif |