look up an existing debugfs file
struct dentry * debugfs_lookup (
|const char * name, |
| ||struct dentry * parent|
const char * name
a pointer to a string containing the name of the file to look up.
struct dentry * parent
a pointer to the parent dentry of the file.
This function will return a pointer to a dentry if it succeeds. If the file
doesn't exist or an error occurs,
NULL will be returned. The returned
dentry must be passed to
dput when it is no longer needed.
If debugfs is not enabled in the kernel, the value -
ENODEV will be