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tracing: Rename trace_event_mutex to trace_event_sem

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trace_event_mutex is an rw semaphore now, not a mutex, change the name.

Link: http://lkml.kernel.org/r/513D843B.40109@huawei.com

Signed-off-by: zhangwei(Jovi) <jovi.zhangwei@huawei.com>
[ Forward ported to my new code ]
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
zhangwei(Jovi)
2013-03-11 15:14:03 +08:00
committed by Steven Rostedt
parent 36a78e9e87
commit 52f6ad6dc3
3 changed files with 20 additions and 20 deletions
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22
kernel/trace/trace_events.c
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@@ -1584,7 +1584,7 @@ int trace_add_event_call(struct ftrace_event_call *call)
}
/*
* Must be called under locking both of event_mutex and trace_event_mutex.
* Must be called under locking both of event_mutex and trace_event_sem.
*/
static void __trace_remove_event_call(struct ftrace_event_call *call)
{
@@ -1597,9 +1597,9 @@ static void __trace_remove_event_call(struct ftrace_event_call *call)
void trace_remove_event_call(struct ftrace_event_call *call)
{
mutex_lock(&event_mutex);
down_write(&trace_event_mutex);
down_write(&trace_event_sem);
__trace_remove_event_call(call);
up_write(&trace_event_mutex);
up_write(&trace_event_sem);
mutex_unlock(&event_mutex);
}
@@ -1707,7 +1707,7 @@ static void trace_module_remove_events(struct module *mod)
struct ftrace_event_call *call, *p;
bool clear_trace = false;
down_write(&trace_event_mutex);
down_write(&trace_event_sem);
list_for_each_entry_safe(call, p, &ftrace_events, list) {
if (call->mod == mod) {
if (call->flags & TRACE_EVENT_FL_WAS_ENABLED)
@@ -1725,7 +1725,7 @@ static void trace_module_remove_events(struct module *mod)
list_del(&file_ops->list);
kfree(file_ops);
}
up_write(&trace_event_mutex);
up_write(&trace_event_sem);
/*
* It is safest to reset the ring buffer if the module being unloaded
@@ -2262,9 +2262,9 @@ int event_trace_add_tracer(struct dentry *parent, struct trace_array *tr)
if (ret)
goto out_unlock;
down_write(&trace_event_mutex);
down_write(&trace_event_sem);
__trace_add_event_dirs(tr);
up_write(&trace_event_mutex);
up_write(&trace_event_sem);
out_unlock:
mutex_unlock(&event_mutex);
@@ -2287,9 +2287,9 @@ early_event_add_tracer(struct dentry *parent, struct trace_array *tr)
if (ret)
goto out_unlock;
down_write(&trace_event_mutex);
down_write(&trace_event_sem);
__trace_early_add_event_dirs(tr);
up_write(&trace_event_mutex);
up_write(&trace_event_sem);
out_unlock:
mutex_unlock(&event_mutex);
@@ -2304,10 +2304,10 @@ int event_trace_del_tracer(struct trace_array *tr)
mutex_lock(&event_mutex);
down_write(&trace_event_mutex);
down_write(&trace_event_sem);
__trace_remove_event_dirs(tr);
debugfs_remove_recursive(tr->event_dir);
up_write(&trace_event_mutex);
up_write(&trace_event_sem);
tr->event_dir = NULL;