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tracing/stat: Add stat_release() callback

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Add stat_release() callback to struct tracer_stat, so a stat tracer
can release it's entries after the stat file has been read out.

Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4A51B16A.6020708@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Lai Jiangshan 2009-07-06 16:10:18 +08:00 committed by Ingo Molnar
parent 80098c200e
commit d8ea37d5de
2 changed files with 7 additions and 2 deletions
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7
kernel/trace/trace_stat.c
View file

@ -49,7 +49,8 @@ static struct dentry *stat_dir;
* but it will at least advance closer to the next one
* to be released.
*/
static struct rb_node *release_next(struct rb_node *node)
static struct rb_node *release_next(struct tracer_stat *ts,
struct rb_node *node)
{
struct stat_node *snode;
struct rb_node *parent = rb_parent(node);
@ -67,6 +68,8 @@ static struct rb_node *release_next(struct rb_node *node)
parent->rb_right = NULL;
snode = container_of(node, struct stat_node, node);
if (ts->stat_release)
ts->stat_release(snode->stat);
kfree(snode);
return parent;
@ -78,7 +81,7 @@ static void reset_stat_session(struct stat_session *session)
struct rb_node *node = session->stat_root.rb_node;
while (node)
node = release_next(node);
node = release_next(session->ts, node);
session->stat_root = RB_ROOT;
}

2
kernel/trace/trace_stat.h
View file

@ -18,6 +18,8 @@ struct tracer_stat {
int (*stat_cmp)(void *p1, void *p2);
/* Print a stat entry */
int (*stat_show)(struct seq_file *s, void *p);
/* Release an entry */
void (*stat_release)(void *stat);
/* Print the headers of your stat entries */
int (*stat_headers)(struct seq_file *s);
};