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authorLai Jiangshan <laijs@cn.fujitsu.com>2009-07-06 16:10:18 +0800
committerIngo Molnar <mingo@elte.hu>2009-07-10 12:14:05 +0200
commitd8ea37d5de58d35a39d0b4e7d209751aaa1b8174 (patch)
treea64ffb2c844ad0f0e99616a69e6f548370d31665 /kernel/trace
parent80098c200e2ee3b4c86a9d1e156dbcd05380e08f (diff)
tracing/stat: Add stat_release() callback
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>
Diffstat (limited to 'kernel/trace')
-rw-r--r--kernel/trace/trace_stat.c7
-rw-r--r--kernel/trace/trace_stat.h2
2 files changed, 7 insertions, 2 deletions
diff --git a/kernel/trace/trace_stat.c b/kernel/trace/trace_stat.c
index e66f5e49334..f069461f10b 100644
--- a/kernel/trace/trace_stat.c
+++ b/kernel/trace/trace_stat.c
@@ -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;
}
diff --git a/kernel/trace/trace_stat.h b/kernel/trace/trace_stat.h
index f3546a2cd82..8f03914b9a6 100644
--- a/kernel/trace/trace_stat.h
+++ b/kernel/trace/trace_stat.h
@@ -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);
};