trace_event_mutex is rw semaphore now, not mutex,
change the name.
Signed-off-by: zhangwei(Jovi) <[email protected]>
---
kernel/trace/trace_events.c | 10 +++++-----
kernel/trace/trace_output.c | 16 ++++++++--------
kernel/trace/trace_output.h | 2 +-
3 files changed, 14 insertions(+), 14 deletions(-)
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 0626792..61243a4 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -1319,7 +1319,7 @@ static void remove_subsystem_dir(const char *name)
}
/*
- * 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)
{
@@ -1334,9 +1334,9 @@ 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);
}
@@ -1425,7 +1425,7 @@ static void trace_module_remove_events(struct module *mod)
struct ftrace_event_call *call, *p;
bool found = 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) {
found = true;
@@ -1449,7 +1449,7 @@ static void trace_module_remove_events(struct module *mod)
*/
if (found)
tracing_reset_current_online_cpus();
- up_write(&trace_event_mutex);
+ up_write(&trace_event_sem);
}
static int trace_module_notify(struct notifier_block *self,
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 697e88d..6fa709b 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -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;
@@ -783,12 +783,12 @@ 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);
}
/**
@@ -811,7 +811,7 @@ 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;
@@ -866,14 +866,14 @@ 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)
{
@@ -888,9 +888,9 @@ 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;
}
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
index c038eba..4d96de5 100644
--- a/kernel/trace/trace_output.h
+++ b/kernel/trace/trace_output.h
@@ -31,7 +31,7 @@ trace_print_lat_fmt(struct trace_seq *s, struct trace_entry
*entry);
/* used by module unregistering */
extern int __unregister_ftrace_event(struct trace_event *event);
-extern struct rw_semaphore trace_event_mutex;
+extern struct rw_semaphore trace_event_sem;
#define MAX_MEMHEX_BYTES 8
#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
--
1.7.9.7
--
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