[PATCH v2 0/5] ALSA: Drop async signal support

[Takashi Iwai <tiwai@suse.de>]

Hi,

this is a revised patch set for dropping fasync support from ALSA
core.

The async signal itself is very difficult to use properly due to
various restrictions (e.g. you cannot perform any I/O in the context),
hence it's a feature that has been never used by real applications.

OTOH, the real problem is that there have been quite a few syzcaller
reports indicating that fasync code path may lead to some potential
deadlocks for long time.  Dropping the feature is the easiest
solution, obviously.

The corresponding update for alsa-lib will follow once when we agree
with this approach.


thanks,

Takashi

===

v1: https://lore.kernel.org/r/20220715102935.4695-1-tiwai@suse.de
v1->v2: Fix unused variable warning in patch 2

===

Takashi Iwai (5):
  ALSA: timer: Drop async signal support
  ALSA: pcm: Drop async signal support
  ALSA: control: Drop async signal support
  ALSA: core: Drop async signal support
  ALSA: doc: Drop stale fasync entry

 .../kernel-api/writing-an-alsa-driver.rst      |  1 -
 include/sound/control.h                        |  1 -
 include/sound/pcm.h                            |  1 -
 sound/core/control.c                           | 11 -----------
 sound/core/init.c                              | 11 +----------
 sound/core/pcm_lib.c                           |  8 +-------
 sound/core/pcm_native.c                        | 18 ------------------
 sound/core/timer.c                             | 13 -------------
 8 files changed, 2 insertions(+), 62 deletions(-)

-- 
2.35.3