[tip:tracing/urgent] function-graph: use ftrace_graph_funcs directly

tip-bot for Li Zefan
2009-09-19T18:04:11Z

Commit-ID: a4ec5e0c2681b8cf99ddabf118705847f7460f19
Gitweb: http://git.kernel.org/tip/a4ec5e0c2681b8cf99ddabf118705847f7460f19
Author: Li Zefan <lizf@cn.fujitsu.com>
AuthorDate: Fri, 18 Sep 2009 14:06:28 +0800
Committer: Steven Rostedt <rostedt@goodmis.org>
CommitDate: Sat, 19 Sep 2009 11:26:54 -0400

function-graph: use ftrace_graph_funcs directly

No need to store ftrace_graph_funcs in file->private.

Acked-by: Frederic Weisbecker <fweisbec@gmail.com>
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4AB32364.7020602@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

---
kernel/trace/ftrace.c | 23 ++++-------------------
1 files changed, 4 insertions(+), 19 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index cc615f8..c71e91b 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -2414,11 +2414,9 @@ unsigned long ftrace_graph_funcs[FTRACE_GRAPH_MAX_FUNCS] __read_mostly;
static void *
__g_next(struct seq_file *m, loff_t *pos)
{
- unsigned long *array = m->private;
-
if (*pos >= ftrace_graph_count)
return NULL;
- return &array[*pos];
+ return &ftrace_graph_funcs[*pos];
}

static void *
@@ -2482,16 +2480,10 @@ ftrace_graph_open(struct inode *inode, struct file *file)
ftrace_graph_count = 0;
memset(ftrace_graph_funcs, 0, sizeof(ftrace_graph_funcs));
}
+ mutex_unlock(&graph_lock);

- if (file->f_mode & FMODE_READ) {
+ if (file->f_mode & FMODE_READ)
ret = seq_open(file, &ftrace_graph_seq_ops);
- if (!ret) {
- struct seq_file *m = file->private_data;
- m->private = ftrace_graph_funcs;
- }
- } else
- file->private_data = ftrace_graph_funcs;
- mutex_unlock(&graph_lock);

return ret;
}
@@ -2560,7 +2552,6 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct trace_parser parser;
- unsigned long *array;
size_t read = 0;
ssize_t ret;

@@ -2574,12 +2565,6 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
goto out;
}

- if (file->f_mode & FMODE_READ) {
- struct seq_file *m = file->private_data;
- array = m->private;
- } else
- array = file->private_data;
-
if (trace_parser_get_init(&parser, FTRACE_BUFF_MAX)) {
ret = -ENOMEM;
goto out;
@@ -2591,7 +2576,7 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
parser.buffer[parser.idx] = 0;

/* we allow only one expression at a time */
- ret = ftrace_set_func(array, &ftrace_graph_count,
+ ret = ftrace_set_func(ftrace_graph_funcs, &ftrace_graph_count,
parser.buffer);
if (ret)
goto out;