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function-graph: Fix seqfile memory leak

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Every time we cat set_graph_function, we leak memory allocated
by seq_open().

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4A67D907.2010500@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Li Zefan 2009-07-23 11:29:11 +08:00 committed by Steven Rostedt
parent d8cc1ab793
commit 87827111a5
1 changed files with 12 additions and 3 deletions
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15
kernel/trace/ftrace.c
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@ -2595,6 +2595,14 @@ ftrace_graph_open(struct inode *inode, struct file *file)
return ret;
}
static int
ftrace_graph_release(struct inode *inode, struct file *file)
{
if (file->f_mode & FMODE_READ)
seq_release(inode, file);
return 0;
}
static int
ftrace_set_func(unsigned long *array, int *idx, char *buffer)
{
@ -2724,9 +2732,10 @@ ftrace_graph_write(struct file *file, const char __user *ubuf,
}
static const struct file_operations ftrace_graph_fops = {
.open = ftrace_graph_open,
.read = seq_read,
.write = ftrace_graph_write,
.open = ftrace_graph_open,
.read = seq_read,
.write = ftrace_graph_write,
.release = ftrace_graph_release,
};
#endif /* CONFIG_FUNCTION_GRAPH_TRACER */