On Thu, 29 May 2025, Jeff Layton <jlay...@kernel.org> wrote:
> Add a new "ref_tracker" directory in debugfs. Each individual refcount
> tracker can register files under there to display info about
> currently-held references.
>
> Reviewed-by: Andrew Lunn <and...@lunn.ch>
> Signed-off-by: Jeff Layton <jlay...@kernel.org>
> ---
> lib/ref_tracker.c | 13 +++++++++++++
> 1 file changed, 13 insertions(+)
>
> diff --git a/lib/ref_tracker.c b/lib/ref_tracker.c
> index
> de71439e12a3bab6456910986fa611dfbdd97980..d374e5273e1497cac0d70c02c282baa2c3ab63fe
> 100644
> --- a/lib/ref_tracker.c
> +++ b/lib/ref_tracker.c
> @@ -273,3 +273,16 @@ int ref_tracker_free(struct ref_tracker_dir *dir,
> return 0;
> }
> EXPORT_SYMBOL_GPL(ref_tracker_free);
> +
> +#ifdef CONFIG_DEBUG_FS
> +#include <linux/debugfs.h>
> +
> +static struct dentry *ref_tracker_debug_dir = (struct dentry *)-ENOENT;
Nitpick, please prefer ERR_PTR(-ENOENT) over casting inline.
BR,
Jani.
> +
> +static int __init ref_tracker_debugfs_init(void)
> +{
> + ref_tracker_debug_dir = debugfs_create_dir("ref_tracker", NULL);
> + return 0;
> +}
> +late_initcall(ref_tracker_debugfs_init);
> +#endif /* CONFIG_DEBUG_FS */
--
Jani Nikula, Intel
