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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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16
kernel/trace/trace_output.c
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@@ -14,7 +14,7 @@
/* must be a power of 2 */
#define EVENT_HASHSIZE 128
DECLARE_RWSEM(trace_event_mutex);
DECLARE_RWSEM(trace_event_sem);
static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
@@ -826,12 +826,12 @@ static int trace_search_list(struct list_head **list)
void trace_event_read_lock(void)
{
down_read(&trace_event_mutex);
down_read(&trace_event_sem);
}
void trace_event_read_unlock(void)
{
up_read(&trace_event_mutex);
up_read(&trace_event_sem);
}
/**
@@ -854,7 +854,7 @@ int register_ftrace_event(struct trace_event *event)
unsigned key;
int ret = 0;
down_write(&trace_event_mutex);
down_write(&trace_event_sem);
if (WARN_ON(!event))
goto out;
@@ -909,14 +909,14 @@ int register_ftrace_event(struct trace_event *event)
ret = event->type;
out:
up_write(&trace_event_mutex);
up_write(&trace_event_sem);
return ret;
}
EXPORT_SYMBOL_GPL(register_ftrace_event);
/*
* Used by module code with the trace_event_mutex held for write.
* Used by module code with the trace_event_sem held for write.
*/
int __unregister_ftrace_event(struct trace_event *event)
{
@@ -931,9 +931,9 @@ int __unregister_ftrace_event(struct trace_event *event)
*/
int unregister_ftrace_event(struct trace_event *event)
{
down_write(&trace_event_mutex);
down_write(&trace_event_sem);
__unregister_ftrace_event(event);
up_write(&trace_event_mutex);
up_write(&trace_event_sem);
return 0;
}