tracing: Consolidate trace_add/remove_event_call back to the nolock functions

The trace_add/remove_event_call_nolock() functions were added to allow
the tace_add/remove_event_call() code be called when the event_mutex
lock was already taken. Now that all callers are done within the
event_mutex, there's no reason to have two different interfaces.

Remove the current wrapper trace_add/remove_event_call()s and rename the
_nolock versions back to the original names.

Link: http://lkml.kernel.org/r/154140866955.17322.2081425494660638846.stgit@devboxAcked-by: default avatarMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
parent 0e2b81f7
...@@ -529,8 +529,6 @@ extern int trace_event_raw_init(struct trace_event_call *call); ...@@ -529,8 +529,6 @@ extern int trace_event_raw_init(struct trace_event_call *call);
extern int trace_define_field(struct trace_event_call *call, const char *type, extern int trace_define_field(struct trace_event_call *call, const char *type,
const char *name, int offset, int size, const char *name, int offset, int size,
int is_signed, int filter_type); int is_signed, int filter_type);
extern int trace_add_event_call_nolock(struct trace_event_call *call);
extern int trace_remove_event_call_nolock(struct trace_event_call *call);
extern int trace_add_event_call(struct trace_event_call *call); extern int trace_add_event_call(struct trace_event_call *call);
extern int trace_remove_event_call(struct trace_event_call *call); extern int trace_remove_event_call(struct trace_event_call *call);
extern int trace_event_get_offsets(struct trace_event_call *call); extern int trace_event_get_offsets(struct trace_event_call *call);
......
...@@ -2305,7 +2305,8 @@ __trace_early_add_new_event(struct trace_event_call *call, ...@@ -2305,7 +2305,8 @@ __trace_early_add_new_event(struct trace_event_call *call,
struct ftrace_module_file_ops; struct ftrace_module_file_ops;
static void __add_event_to_tracers(struct trace_event_call *call); static void __add_event_to_tracers(struct trace_event_call *call);
int trace_add_event_call_nolock(struct trace_event_call *call) /* Add an additional event_call dynamically */
int trace_add_event_call(struct trace_event_call *call)
{ {
int ret; int ret;
lockdep_assert_held(&event_mutex); lockdep_assert_held(&event_mutex);
...@@ -2320,17 +2321,6 @@ int trace_add_event_call_nolock(struct trace_event_call *call) ...@@ -2320,17 +2321,6 @@ int trace_add_event_call_nolock(struct trace_event_call *call)
return ret; return ret;
} }
/* Add an additional event_call dynamically */
int trace_add_event_call(struct trace_event_call *call)
{
int ret;
mutex_lock(&event_mutex);
ret = trace_add_event_call_nolock(call);
mutex_unlock(&event_mutex);
return ret;
}
/* /*
* Must be called under locking of trace_types_lock, event_mutex and * Must be called under locking of trace_types_lock, event_mutex and
* trace_event_sem. * trace_event_sem.
...@@ -2376,8 +2366,8 @@ static int probe_remove_event_call(struct trace_event_call *call) ...@@ -2376,8 +2366,8 @@ static int probe_remove_event_call(struct trace_event_call *call)
return 0; return 0;
} }
/* no event_mutex version */ /* Remove an event_call */
int trace_remove_event_call_nolock(struct trace_event_call *call) int trace_remove_event_call(struct trace_event_call *call)
{ {
int ret; int ret;
...@@ -2392,18 +2382,6 @@ int trace_remove_event_call_nolock(struct trace_event_call *call) ...@@ -2392,18 +2382,6 @@ int trace_remove_event_call_nolock(struct trace_event_call *call)
return ret; return ret;
} }
/* Remove an event_call */
int trace_remove_event_call(struct trace_event_call *call)
{
int ret;
mutex_lock(&event_mutex);
ret = trace_remove_event_call_nolock(call);
mutex_unlock(&event_mutex);
return ret;
}
#define for_each_event(event, start, end) \ #define for_each_event(event, start, end) \
for (event = start; \ for (event = start; \
(unsigned long)event < (unsigned long)end; \ (unsigned long)event < (unsigned long)end; \
......
...@@ -960,7 +960,7 @@ static int register_synth_event(struct synth_event *event) ...@@ -960,7 +960,7 @@ static int register_synth_event(struct synth_event *event)
call->data = event; call->data = event;
call->tp = event->tp; call->tp = event->tp;
ret = trace_add_event_call_nolock(call); ret = trace_add_event_call(call);
if (ret) { if (ret) {
pr_warn("Failed to register synthetic event: %s\n", pr_warn("Failed to register synthetic event: %s\n",
trace_event_name(call)); trace_event_name(call));
...@@ -969,7 +969,7 @@ static int register_synth_event(struct synth_event *event) ...@@ -969,7 +969,7 @@ static int register_synth_event(struct synth_event *event)
ret = set_synth_event_print_fmt(call); ret = set_synth_event_print_fmt(call);
if (ret < 0) { if (ret < 0) {
trace_remove_event_call_nolock(call); trace_remove_event_call(call);
goto err; goto err;
} }
out: out:
...@@ -984,7 +984,7 @@ static int unregister_synth_event(struct synth_event *event) ...@@ -984,7 +984,7 @@ static int unregister_synth_event(struct synth_event *event)
struct trace_event_call *call = &event->call; struct trace_event_call *call = &event->call;
int ret; int ret;
ret = trace_remove_event_call_nolock(call); ret = trace_remove_event_call(call);
return ret; return ret;
} }
......
...@@ -1353,7 +1353,7 @@ static int register_kprobe_event(struct trace_kprobe *tk) ...@@ -1353,7 +1353,7 @@ static int register_kprobe_event(struct trace_kprobe *tk)
kfree(call->print_fmt); kfree(call->print_fmt);
return -ENODEV; return -ENODEV;
} }
ret = trace_add_event_call_nolock(call); ret = trace_add_event_call(call);
if (ret) { if (ret) {
pr_info("Failed to register kprobe event: %s\n", pr_info("Failed to register kprobe event: %s\n",
trace_event_name(call)); trace_event_name(call));
...@@ -1368,7 +1368,7 @@ static int unregister_kprobe_event(struct trace_kprobe *tk) ...@@ -1368,7 +1368,7 @@ static int unregister_kprobe_event(struct trace_kprobe *tk)
int ret; int ret;
/* tp->event is unregistered in trace_remove_event_call() */ /* tp->event is unregistered in trace_remove_event_call() */
ret = trace_remove_event_call_nolock(&tk->tp.call); ret = trace_remove_event_call(&tk->tp.call);
if (!ret) if (!ret)
kfree(tk->tp.call.print_fmt); kfree(tk->tp.call.print_fmt);
return ret; return ret;
......
...@@ -1320,7 +1320,7 @@ static int register_uprobe_event(struct trace_uprobe *tu) ...@@ -1320,7 +1320,7 @@ static int register_uprobe_event(struct trace_uprobe *tu)
return -ENODEV; return -ENODEV;
} }
ret = trace_add_event_call_nolock(call); ret = trace_add_event_call(call);
if (ret) { if (ret) {
pr_info("Failed to register uprobe event: %s\n", pr_info("Failed to register uprobe event: %s\n",
...@@ -1337,7 +1337,7 @@ static int unregister_uprobe_event(struct trace_uprobe *tu) ...@@ -1337,7 +1337,7 @@ static int unregister_uprobe_event(struct trace_uprobe *tu)
int ret; int ret;
/* tu->event is unregistered in trace_remove_event_call() */ /* tu->event is unregistered in trace_remove_event_call() */
ret = trace_remove_event_call_nolock(&tu->tp.call); ret = trace_remove_event_call(&tu->tp.call);
if (ret) if (ret)
return ret; return ret;
kfree(tu->tp.call.print_fmt); kfree(tu->tp.call.print_fmt);
......
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