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authorLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 16:35:07 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-10-20 16:35:07 -0400
commit92b29b86fe2e183d44eb467e5e74a5f718ef2e43 (patch)
tree1bac8a1aa11d47322b66d10ec3a370016d843d06 /samples/tracepoints/tracepoint-sample.c
parentb9d7ccf56be1ac77b71a284a1c0e6337f9a7aff0 (diff)
parent98d9c66ab07471006fd7910cb16453581c41a3e7 (diff)
Merge branch 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'tracing-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (131 commits) tracing/fastboot: improve help text tracing/stacktrace: improve help text tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix bootgraph.pl initcall name regexp tracing/fastboot: fix issues and improve output of bootgraph.pl tracepoints: synchronize unregister static inline tracepoints: tracepoint_synchronize_unregister() ftrace: make ftrace_test_p6nop disassembler-friendly markers: fix synchronize marker unregister static inline tracing/fastboot: add better resolution to initcall debug/tracing trace: add build-time check to avoid overrunning hex buffer ftrace: fix hex output mode of ftrace tracing/fastboot: fix initcalls disposition in bootgraph.pl tracing/fastboot: fix printk format typo in boot tracer ftrace: return an error when setting a nonexistent tracer ftrace: make some tracers reentrant ring-buffer: make reentrant ring-buffer: move page indexes into page headers tracing/fastboot: only trace non-module initcalls ftrace: move pc counter in irqtrace ... Manually fix conflicts: - init/main.c: initcall tracing - kernel/module.c: verbose level vs tracepoints - scripts/bootgraph.pl: fallout from cherry-picking commits.
Diffstat (limited to 'samples/tracepoints/tracepoint-sample.c')
-rw-r--r--samples/tracepoints/tracepoint-sample.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/samples/tracepoints/tracepoint-sample.c b/samples/tracepoints/tracepoint-sample.c
new file mode 100644
index 000000000000..4ae4b7fcc043
--- /dev/null
+++ b/samples/tracepoints/tracepoint-sample.c
@@ -0,0 +1,53 @@
1/* tracepoint-sample.c
2 *
3 * Executes a tracepoint when /proc/tracepoint-example is opened.
4 *
5 * (C) Copyright 2007 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
6 *
7 * This file is released under the GPLv2.
8 * See the file COPYING for more details.
9 */
10
11#include <linux/module.h>
12#include <linux/sched.h>
13#include <linux/proc_fs.h>
14#include "tp-samples-trace.h"
15
16struct proc_dir_entry *pentry_example;
17
18static int my_open(struct inode *inode, struct file *file)
19{
20 int i;
21
22 trace_subsys_event(inode, file);
23 for (i = 0; i < 10; i++)
24 trace_subsys_eventb();
25 return -EPERM;
26}
27
28static struct file_operations mark_ops = {
29 .open = my_open,
30};
31
32static int example_init(void)
33{
34 printk(KERN_ALERT "example init\n");
35 pentry_example = proc_create("tracepoint-example", 0444, NULL,
36 &mark_ops);
37 if (!pentry_example)
38 return -EPERM;
39 return 0;
40}
41
42static void example_exit(void)
43{
44 printk(KERN_ALERT "example exit\n");
45 remove_proc_entry("tracepoint-example", NULL);
46}
47
48module_init(example_init)
49module_exit(example_exit)
50
51MODULE_LICENSE("GPL");
52MODULE_AUTHOR("Mathieu Desnoyers");
53MODULE_DESCRIPTION("Tracepoint example");