6.15-stable review patch. If anyone has any objections, please let me know.
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From: Steven Rostedt rostedt@goodmis.org
[ Upstream commit f2947c4b7d0f235621c5daf78aecfbd6e22c05e5 ]
The function event_trigger_alloc() creates an event_trigger_data descriptor and states that it needs to be freed via event_trigger_free(). This is incorrect, it needs to be freed by trigger_data_free() as event_trigger_free() adds ref counting.
Rename event_trigger_alloc() to trigger_data_alloc() and state that it needs to be freed via trigger_data_free(). This naming convention was introducing bugs.
Cc: Masami Hiramatsu mhiramat@kernel.org Cc: Mark Rutland mark.rutland@arm.com Cc: Mathieu Desnoyers mathieu.desnoyers@efficios.com Cc: Andrew Morton akpm@linux-foundation.org Cc: Tom Zanussi zanussi@kernel.org Link: https://lore.kernel.org/20250507145455.776436410@goodmis.org Fixes: 86599dbe2c527 ("tracing: Add helper functions to simplify event_command.parse() callback handling") Signed-off-by: Steven Rostedt (Google) rostedt@goodmis.org Signed-off-by: Sasha Levin sashal@kernel.org --- kernel/trace/trace.h | 8 +++----- kernel/trace/trace_events_hist.c | 2 +- kernel/trace/trace_events_trigger.c | 16 ++++++++-------- 3 files changed, 12 insertions(+), 14 deletions(-)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 79be1995db44c..10ee434a9b755 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -1772,6 +1772,9 @@ extern int event_enable_register_trigger(char *glob, extern void event_enable_unregister_trigger(char *glob, struct event_trigger_data *test, struct trace_event_file *file); +extern struct event_trigger_data * +trigger_data_alloc(struct event_command *cmd_ops, char *cmd, char *param, + void *private_data); extern void trigger_data_free(struct event_trigger_data *data); extern int event_trigger_init(struct event_trigger_data *data); extern int trace_event_trigger_enable_disable(struct trace_event_file *file, @@ -1798,11 +1801,6 @@ extern bool event_trigger_check_remove(const char *glob); extern bool event_trigger_empty_param(const char *param); extern int event_trigger_separate_filter(char *param_and_filter, char **param, char **filter, bool param_required); -extern struct event_trigger_data * -event_trigger_alloc(struct event_command *cmd_ops, - char *cmd, - char *param, - void *private_data); extern int event_trigger_parse_num(char *trigger, struct event_trigger_data *trigger_data); extern int event_trigger_set_filter(struct event_command *cmd_ops, diff --git a/kernel/trace/trace_events_hist.c b/kernel/trace/trace_events_hist.c index 0ec692f80aefc..86fd06812cdab 100644 --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -6795,7 +6795,7 @@ static int event_hist_trigger_parse(struct event_command *cmd_ops, return PTR_ERR(hist_data); }
- trigger_data = event_trigger_alloc(cmd_ops, cmd, param, hist_data); + trigger_data = trigger_data_alloc(cmd_ops, cmd, param, hist_data); if (!trigger_data) { ret = -ENOMEM; goto out_free; diff --git a/kernel/trace/trace_events_trigger.c b/kernel/trace/trace_events_trigger.c index 6e87ae2a1a66b..9f3f76405a28c 100644 --- a/kernel/trace/trace_events_trigger.c +++ b/kernel/trace/trace_events_trigger.c @@ -804,7 +804,7 @@ int event_trigger_separate_filter(char *param_and_filter, char **param, }
/** - * event_trigger_alloc - allocate and init event_trigger_data for a trigger + * trigger_data_alloc - allocate and init event_trigger_data for a trigger * @cmd_ops: The event_command operations for the trigger * @cmd: The cmd string * @param: The param string @@ -815,14 +815,14 @@ int event_trigger_separate_filter(char *param_and_filter, char **param, * trigger_ops to assign to the event_trigger_data. @private_data can * also be passed in and associated with the event_trigger_data. * - * Use event_trigger_free() to free an event_trigger_data object. + * Use trigger_data_free() to free an event_trigger_data object. * * Return: The trigger_data object success, NULL otherwise */ -struct event_trigger_data *event_trigger_alloc(struct event_command *cmd_ops, - char *cmd, - char *param, - void *private_data) +struct event_trigger_data *trigger_data_alloc(struct event_command *cmd_ops, + char *cmd, + char *param, + void *private_data) { struct event_trigger_data *trigger_data; const struct event_trigger_ops *trigger_ops; @@ -989,7 +989,7 @@ event_trigger_parse(struct event_command *cmd_ops, return ret;
ret = -ENOMEM; - trigger_data = event_trigger_alloc(cmd_ops, cmd, param, file); + trigger_data = trigger_data_alloc(cmd_ops, cmd, param, file); if (!trigger_data) goto out;
@@ -1793,7 +1793,7 @@ int event_enable_trigger_parse(struct event_command *cmd_ops, enable_data->enable = enable; enable_data->file = event_enable_file;
- trigger_data = event_trigger_alloc(cmd_ops, cmd, param, enable_data); + trigger_data = trigger_data_alloc(cmd_ops, cmd, param, enable_data); if (!trigger_data) { kfree(enable_data); goto out;