Preparation for the next patch. Extract the common code from
remove_event_from_tracers() and __trace_remove_event_dirs()
into the new helper, remove_event_file_dir().
The patch looks more complicated than it actually is, it also
moves remove_subsystem() up to avoid the forward declaration.
Signed-off-by: Oleg Nesterov <o...@redhat.com>
---
kernel/trace/trace_events.c | 47 +++++++++++++++++++++----------------------
1 files changed, 23 insertions(+), 24 deletions(-)
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 3de2aca..2a4f68a 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -409,11 +409,31 @@ static void put_system(struct ftrace_subsystem_dir *dir)
mutex_unlock(&event_mutex);
}
+static void remove_subsystem(struct ftrace_subsystem_dir *dir)
+{
+ if (!dir)
+ return;
+
+ if (!--dir->nr_events) {
+ debugfs_remove_recursive(dir->entry);
+ list_del(&dir->list);
+ __put_system_dir(dir);
+ }
+}
+
static void *event_file_data(struct file *filp)
{
return ACCESS_ONCE(file_inode(filp)->i_private);
}
+static void remove_event_file_dir(struct ftrace_event_file *file)
+{
+ list_del(&file->list);
+ debugfs_remove_recursive(file->dir);
+ remove_subsystem(file->system);
+ kmem_cache_free(file_cachep, file);
+}
+
/*
* Open and update trace_array ref count.
* Must have the current trace_array passed to it.
@@ -1545,33 +1565,16 @@ event_create_dir(struct dentry *parent,
return 0;
}
-static void remove_subsystem(struct ftrace_subsystem_dir *dir)
-{
- if (!dir)
- return;
-
- if (!--dir->nr_events) {
- debugfs_remove_recursive(dir->entry);
- list_del(&dir->list);
- __put_system_dir(dir);
- }
-}
-
static void remove_event_from_tracers(struct ftrace_event_call *call)
{
struct ftrace_event_file *file;
struct trace_array *tr;
do_for_each_event_file_safe(tr, file) {
-
if (file->event_call != call)
continue;
- list_del(&file->list);
- debugfs_remove_recursive(file->dir);
- remove_subsystem(file->system);
- kmem_cache_free(file_cachep, file);
-
+ remove_event_file_dir(file);
/*
* The do_for_each_event_file_safe() is
* a double loop. After finding the call for this
@@ -2301,12 +2304,8 @@ __trace_remove_event_dirs(struct trace_array *tr)
{
struct ftrace_event_file *file, *next;
- list_for_each_entry_safe(file, next, &tr->events, list) {
- list_del(&file->list);
- debugfs_remove_recursive(file->dir);
- remove_subsystem(file->system);
- kmem_cache_free(file_cachep, file);
- }
+ list_for_each_entry_safe(file, next, &tr->events, list)
+ remove_event_file_dir(file);
}
static void
--
1.5.5.1
--
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