diff options
| author | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2024-08-18 19:43:07 +0900 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2024-09-25 23:23:44 +0900 |
| commit | d4df54f338e43c790460674a3cc7db35b8395421 (patch) | |
| tree | 98e1cb8212aced07c1cea62b492673863b696be7 /kernel/tracepoint.c | |
| parent | d5dbf8b48a4620db771f399ed7fce32d447f04a6 (diff) | |
tracepoint: Support iterating tracepoints in a loading module
Add for_each_tracepoint_in_module() function to iterate tracepoints in
a module. This API is needed for handling tracepoints in a loading
module from tracepoint_module_notifier callback function.
This also update for_each_module_tracepoint() to pass the module to
callback function so that it can find module easily.
Link: https://lore.kernel.org/all/172397778740.286558.15781131277732977643.stgit@devnote2/
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Diffstat (limited to 'kernel/tracepoint.c')
| -rw-r--r-- | kernel/tracepoint.c | 37 |
1 files changed, 29 insertions, 8 deletions
diff --git a/kernel/tracepoint.c b/kernel/tracepoint.c index bed4aad36d92..8879da16ef4d 100644 --- a/kernel/tracepoint.c +++ b/kernel/tracepoint.c @@ -737,23 +737,44 @@ static __init int init_tracepoints(void) __initcall(init_tracepoints); /** + * for_each_tracepoint_in_module - iteration on all tracepoints in a module + * @mod: module + * @fct: callback + * @priv: private data + */ +void for_each_tracepoint_in_module(struct module *mod, + void (*fct)(struct tracepoint *tp, + struct module *mod, void *priv), + void *priv) +{ + tracepoint_ptr_t *begin, *end, *iter; + + lockdep_assert_held(&tracepoint_module_list_mutex); + + if (!mod) + return; + + begin = mod->tracepoints_ptrs; + end = mod->tracepoints_ptrs + mod->num_tracepoints; + + for (iter = begin; iter < end; iter++) + fct(tracepoint_ptr_deref(iter), mod, priv); +} + +/** * 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 for_each_module_tracepoint(void (*fct)(struct tracepoint *tp, + struct module *mod, 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); - } + list_for_each_entry(tp_mod, &tracepoint_module_list, list) + for_each_tracepoint_in_module(tp_mod->mod, fct, priv); mutex_unlock(&tracepoint_module_list_mutex); } #endif /* CONFIG_MODULES */ |