Re: [PATCH] ALSA: seq: Drop the dead struct snd_seq_event_bounce

[Takashi Iwai]

On Wed, 12 Aug 2026 16:15:06 +0200,
HyeongJun An wrote:
> 
> The struct describes a bounce payload of an error code followed by the
> original event and its external data.  No kernel has ever sent that.
> Before commit efc86691e4d8 ("ALSA: seq: Fix kernel heap address leak in
> bounce_error_event()") the kernel emitted no SNDRV_SEQ_EVENT_BOUNCE at
> all, and since then it sends the event record alone.
> 
> Nothing has ever read it either.  Its only accessor,
> snd_seq_event_bounce_ext_data(), has had no caller for the whole git
> history, and it did not even compile until commit c7e0b5bf9fff ("[ALSA]
> Remove xxx_t typedefs: Sequencer") incidentally repaired the type name
> it referred to, three years after the git import.  Drop the accessor
> along with the struct.
> 
> This removes a definition from a UAPI header.  Since no kernel ever
> produced the layout, nothing can have parsed it, but a program that
> merely names the type will need to stop.
> 
> Suggested-by: Takashi Iwai <tiwai@xxxxxxx>
> Assisted-by: Claude:claude-opus-5
> Signed-off-by: HyeongJun An <sammiee5311@xxxxxxxxx>

Applied to for-next branch now.  Thanks.


Takashi