On 07/17/12 20:47, Anton Vorontsov wrote:
> +
> + file = debugfs_create_file("record_ftrace", 0600, dir, NULL,
> + &pstore_knob_fops);
> + if (IS_ERR_OR_NULL(file)) {
> + err = PTR_ERR(file);
> + pr_err("%s: unable to create pstore/ftrace file: %d\n",
> + __func__, err);
> + goto err_file;
> + }
debugfs only returns NULL on failure.
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