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path: root/kernel/trace/trace_event_profile.c
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Diffstat (limited to 'kernel/trace/trace_event_profile.c')
-rw-r--r--kernel/trace/trace_event_profile.c43
1 files changed, 20 insertions, 23 deletions
diff --git a/kernel/trace/trace_event_profile.c b/kernel/trace/trace_event_profile.c
index 8d5c171cc998..d9c60f80aa0d 100644
--- a/kernel/trace/trace_event_profile.c
+++ b/kernel/trace/trace_event_profile.c
@@ -8,17 +8,14 @@
#include <linux/module.h>
#include "trace.h"
-/*
- * We can't use a size but a type in alloc_percpu()
- * So let's create a dummy type that matches the desired size
- */
-typedef struct {char buf[FTRACE_MAX_PROFILE_SIZE];} profile_buf_t;
-char *trace_profile_buf;
-EXPORT_SYMBOL_GPL(trace_profile_buf);
+char *perf_trace_buf;
+EXPORT_SYMBOL_GPL(perf_trace_buf);
+
+char *perf_trace_buf_nmi;
+EXPORT_SYMBOL_GPL(perf_trace_buf_nmi);
-char *trace_profile_buf_nmi;
-EXPORT_SYMBOL_GPL(trace_profile_buf_nmi);
+typedef typeof(char [FTRACE_MAX_PROFILE_SIZE]) perf_trace_t ;
/* Count the events in use (per event id, not per instance) */
static int total_profile_count;
@@ -32,20 +29,20 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
return 0;
if (!total_profile_count) {
- buf = (char *)alloc_percpu(profile_buf_t);
+ buf = (char *)alloc_percpu(perf_trace_t);
if (!buf)
goto fail_buf;
- rcu_assign_pointer(trace_profile_buf, buf);
+ rcu_assign_pointer(perf_trace_buf, buf);
- buf = (char *)alloc_percpu(profile_buf_t);
+ buf = (char *)alloc_percpu(perf_trace_t);
if (!buf)
goto fail_buf_nmi;
- rcu_assign_pointer(trace_profile_buf_nmi, buf);
+ rcu_assign_pointer(perf_trace_buf_nmi, buf);
}
- ret = event->profile_enable();
+ ret = event->profile_enable(event);
if (!ret) {
total_profile_count++;
return 0;
@@ -53,10 +50,10 @@ static int ftrace_profile_enable_event(struct ftrace_event_call *event)
fail_buf_nmi:
if (!total_profile_count) {
- free_percpu(trace_profile_buf_nmi);
- free_percpu(trace_profile_buf);
- trace_profile_buf_nmi = NULL;
- trace_profile_buf = NULL;
+ free_percpu(perf_trace_buf_nmi);
+ free_percpu(perf_trace_buf);
+ perf_trace_buf_nmi = NULL;
+ perf_trace_buf = NULL;
}
fail_buf:
atomic_dec(&event->profile_count);
@@ -89,14 +86,14 @@ static void ftrace_profile_disable_event(struct ftrace_event_call *event)
if (!atomic_add_negative(-1, &event->profile_count))
return;
- event->profile_disable();
+ event->profile_disable(event);
if (!--total_profile_count) {
- buf = trace_profile_buf;
- rcu_assign_pointer(trace_profile_buf, NULL);
+ buf = perf_trace_buf;
+ rcu_assign_pointer(perf_trace_buf, NULL);
- nmi_buf = trace_profile_buf_nmi;
- rcu_assign_pointer(trace_profile_buf_nmi, NULL);
+ nmi_buf = perf_trace_buf_nmi;
+ rcu_assign_pointer(perf_trace_buf_nmi, NULL);
/*
* Ensure every events in profiling have finished before