diff options
| author | Takashi Iwai <tiwai@suse.de> | 2026-09-12 14:49:45 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2026-09-28 12:55:29 +0200 |
| commit | a5af82f2077dd1af7cfebd718eb5c77902f032c4 (patch) | |
| tree | 8aea616c41036dfb37819b75c68f97718e0e714f /sound/core/seq | |
| parent | 4d4bc656580bcc448f8e6d6b3b3a903120eb29bb (diff) | |
ALSA: seq: Mark OSS sequencer emulation as deprecated
OSS sequencer API emulation has been implemented as a client of ALSA
sequencer, decades ago, at the time where OSS was still use. But the
API itself became very niche, and almost noone using it for a real
purpose any longer -- only exceptions are AI and fuzzers, who have
been causing significant maintenance burden for issues they hit &
found.
Meanwhile, the most features of OSS sequencer API emulation can be
achieved in user-space, either by ALSA-OSS layer (aoss) or oss-seq-emu
program:
https://github.com/alsa-project/alsa-oss
https://github.com/tiwai/oss-seq-emu
where the former is LD_PRELOAD wrapper and the latter is a CUSE-based
daemon. So we can drop the stuff from the kernel sooner or later.
Now, let's mark the OSS sequencer emulation as deprecated and give a
warning when loaded, so that we can drop it later actually.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20260912124951.416761-1-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/seq')
| -rw-r--r-- | sound/core/seq/Kconfig | 7 | ||||
| -rw-r--r-- | sound/core/seq/oss/seq_oss.c | 3 |
2 files changed, 8 insertions, 2 deletions
diff --git a/sound/core/seq/Kconfig b/sound/core/seq/Kconfig index e4f58cb985d4..0d606159103e 100644 --- a/sound/core/seq/Kconfig +++ b/sound/core/seq/Kconfig @@ -27,14 +27,17 @@ config SND_SEQ_DUMMY will be called snd-seq-dummy. config SND_SEQUENCER_OSS - tristate "OSS Sequencer API" + tristate "OSS Sequencer API (deprecated)" depends on SND_OSSEMUL select SND_SEQ_MIDI_EVENT help Say Y here to enable OSS sequencer emulation (both /dev/sequencer and /dev/music interfaces). - Many programs still use the OSS API, so say Y. + The OSS sequencer API is almost nowhere used, hence this option will + be dropped soon. + Use user-space wrapper (alsa-oss) or CUSE daemon (oss-seq-emu) + instead of the kernel-side emulation. To compile this driver as a module, choose M here: the module will be called snd-seq-oss. diff --git a/sound/core/seq/oss/seq_oss.c b/sound/core/seq/oss/seq_oss.c index 2835576040ed..64a7e62029cc 100644 --- a/sound/core/seq/oss/seq_oss.c +++ b/sound/core/seq/oss/seq_oss.c @@ -67,6 +67,9 @@ static int __init alsa_seq_oss_init(void) { int rc; + pr_warn("seq-oss: kernel OSS sequencer emulation is deprecated\n"); + pr_warn("seq-oss: Use user-space solution (alsa-oss or oss-seq-emu) instead.\n"); + rc = register_device(); if (rc < 0) goto error; |