Re: [PATCH v3 0/3] debugfs: make debugfs_create_str() read-only

[Greg KH]

On Fri, Aug 07, 2026 at 06:00:50PM +0800, Yichong Chen wrote:
> debugfs_create_str() has a generic write implementation that replaces the
> backing string.  Concurrent writers can race and free the same old string
> twice.
> 
> Instead of adding more locking to the generic helper, convert the existing
> writable in-tree users to local file operations and make
> debugfs_create_str() read-only.
> 
> Changes since v2:
> - Use scoped mutex guards in the interconnect and SoundWire conversions.
> - Clarify why GFP_KERNEL is safe in the interconnect conversion after the
>   RCU read-side critical section is removed.
> - Drop the unnecessary firmware_file = NULL assignment in the SoundWire
>   exit path.
> - Use WARN() instead of WARN_ONCE() so each writable debugfs_create_str()
>   caller can be reported.

Sorry for the delay, now applied.

greg k-h