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authorSteven Rostedt <srostedt@redhat.com>2013-01-25 09:46:36 -0500
committerSteven Rostedt <rostedt@goodmis.org>2013-01-25 11:22:11 -0500
commitd75f717e19fe595e7efbf67de195ada8d89dfbbe (patch)
tree26e00856e0595ee4fa5c54fd5c457d62d86c3ff1 /samples/tracepoints/tracepoint-probe-sample.c
parenttracing: Mark tracing_dentry_percpu() static (diff)
downloadlinux-dev-d75f717e19fe595e7efbf67de195ada8d89dfbbe.tar.xz
linux-dev-d75f717e19fe595e7efbf67de195ada8d89dfbbe.zip
tracing: Remove tracepoint sample code
The tracepoint sample code was used to teach developers how to create their own tracepoints. But now the trace_events have been added as a higher level that is used directly by developers today. Only the trace_event code should use the tracepoint interface directly and no new tracepoints should be added. Besides, the example had a race condition with the use of the ->d_name.name dentry field, as pointed out by Al Viro. Best just to remove the code so it wont be used by other developers. Link: http://lkml.kernel.org/r/20130123225523.GY4939@ZenIV.linux.org.uk Cc: Al Viro <viro@ZenIV.linux.org.uk> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'samples/tracepoints/tracepoint-probe-sample.c')
-rw-r--r--samples/tracepoints/tracepoint-probe-sample.c57
1 files changed, 0 insertions, 57 deletions
diff --git a/samples/tracepoints/tracepoint-probe-sample.c b/samples/tracepoints/tracepoint-probe-sample.c
deleted file mode 100644
index 744c0b9652a7..000000000000
--- a/samples/tracepoints/tracepoint-probe-sample.c
+++ /dev/null
@@ -1,57 +0,0 @@
-/*
- * tracepoint-probe-sample.c
- *
- * sample tracepoint probes.
- */
-
-#include <linux/module.h>
-#include <linux/file.h>
-#include <linux/dcache.h>
-#include "tp-samples-trace.h"
-
-/*
- * Here the caller only guarantees locking for struct file and struct inode.
- * Locking must therefore be done in the probe to use the dentry.
- */
-static void probe_subsys_event(void *ignore,
- struct inode *inode, struct file *file)
-{
- path_get(&file->f_path);
- dget(file->f_path.dentry);
- printk(KERN_INFO "Event is encountered with filename %s\n",
- file->f_path.dentry->d_name.name);
- dput(file->f_path.dentry);
- path_put(&file->f_path);
-}
-
-static void probe_subsys_eventb(void *ignore)
-{
- printk(KERN_INFO "Event B is encountered\n");
-}
-
-static int __init tp_sample_trace_init(void)
-{
- int ret;
-
- ret = register_trace_subsys_event(probe_subsys_event, NULL);
- WARN_ON(ret);
- ret = register_trace_subsys_eventb(probe_subsys_eventb, NULL);
- WARN_ON(ret);
-
- return 0;
-}
-
-module_init(tp_sample_trace_init);
-
-static void __exit tp_sample_trace_exit(void)
-{
- unregister_trace_subsys_eventb(probe_subsys_eventb, NULL);
- unregister_trace_subsys_event(probe_subsys_event, NULL);
- tracepoint_synchronize_unregister();
-}
-
-module_exit(tp_sample_trace_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Tracepoint Probes Samples");