From: Masami Hiramatsu (Google) <mhira...@kernel.org>
Add for_each_module_tracepoint() for iterating over tracepoints
on modules. This is similar to the for_each_kernel_tracepoint()
but only for the tracepoints on modules (not including kernel
built-in tracepoints).
Signed-off-by: Masami Hiramatsu (Google) <mhira...@kernel.org>
---
Changes in v3:
- Add kerneldoc for for_each_module_tracepoint.
---
include/linux/tracepoint.h | 7 +++++++
kernel/tracepoint.c | 21 +++++++++++++++++++++
2 files changed, 28 insertions(+)
diff --git a/include/linux/tracepoint.h b/include/linux/tracepoint.h
index 6be396bb4297..837fcf8ec0d5 100644
--- a/include/linux/tracepoint.h
+++ b/include/linux/tracepoint.h
@@ -64,6 +64,8 @@ struct tp_module {
bool trace_module_has_bad_taint(struct module *mod);
extern int register_tracepoint_module_notifier(struct notifier_block *nb);
extern int unregister_tracepoint_module_notifier(struct notifier_block *nb);
+void for_each_module_tracepoint(void (*fct)(struct tracepoint *, void *),
+ void *priv);
#else
static inline bool trace_module_has_bad_taint(struct module *mod)
{
@@ -79,6 +81,11 @@ int unregister_tracepoint_module_notifier(struct
notifier_block *nb)
{
return 0;
}
+static inline
+void for_each_module_tracepoint(void (*fct)(struct tracepoint *, void *),
+ void *priv)
+{
+}
#endif /* CONFIG_MODULES */
/*
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c
index 8d1507dd0724..bed4aad36d92 100644
--- a/kernel/tracepoint.c
+++ b/kernel/tracepoint.c
@@ -735,6 +735,27 @@ static __init int init_tracepoints(void)
return ret;
}
__initcall(init_tracepoints);
+
+/**
+ * for_each_module_tracepoint - iteration on all tracepoints in all modules
+ * @fct: callback
+ * @priv: private data
+ */
+void for_each_module_tracepoint(void (*fct)(struct tracepoint *tp, void *priv),
+ void *priv)
+{
+ struct tp_module *tp_mod;
+ struct module *mod;
+
+ mutex_lock(&tracepoint_module_list_mutex);
+ list_for_each_entry(tp_mod, &tracepoint_module_list, list) {
+ mod = tp_mod->mod;
+ for_each_tracepoint_range(mod->tracepoints_ptrs,
+ mod->tracepoints_ptrs + mod->num_tracepoints,
+ fct, priv);
+ }
+ mutex_unlock(&tracepoint_module_list_mutex);
+}
#endif /* CONFIG_MODULES */
/**
