Revision 8e37395c3a5dceff62a5010ebbbc107f4145935c authored by Linus Torvalds on 20 October 2021, 16:13:22 UTC, committed by Linus Torvalds on 20 October 2021, 16:13:22 UTC
Pull sound fixes from Takashi Iwai: "Again it became bigger than wished, unfortunately, as this contains quite a few ASoC fixes that came up a bit late. It also includes yet more HD- and USB-audio quirks: I decided to merge them now, as those are for stable, and we'll need them sooner or later. Although the volumes are a bit high, all changes are device-specific (and reasonably small) fixes, so it should be safe for the late rc" * tag 'sound-5.15-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: usb-audio: Fix microphone sound on Jieli webcam. ALSA: hda/realtek: Fixes HP Spectre x360 15-eb1xxx speakers ALSA: usb-audio: Provide quirk for Sennheiser GSP670 Headset ALSA: hda/realtek: Add quirk for Clevo PC50HS ALSA: usb-audio: add Schiit Hel device to quirk table ASoC: wm8960: Fix clock configuration on slave mode ASoC: cs42l42: Ensure 0dB full scale volume is used for headsets ASoC: soc-core: fix null-ptr-deref in snd_soc_del_component_unlocked() ASoC: codec: wcd938x: Add irq config support ASoC: DAPM: Fix missing kctl change notifications ASoC: Intel: bytcht_es8316: Utilize dev_err_probe() to avoid log saturation ASoC: Intel: bytcht_es8316: Switch to use gpiod_get_optional() ASoC: Intel: bytcht_es8316: Use temporary variable for struct device ASoC: Intel: bytcht_es8316: Get platform data via dev_get_platdata() ASoC: wcd938x: Fix jack detection issue ASoC: nau8824: Fix headphone vs headset, button-press detection no longer working ASoC: cs4341: Add SPI device ID table ASoC: pcm179x: Add missing entries SPI to device ID table ASoC: fsl_xcvr: Fix channel swap issue with ARC ASoC: pcm512x: Mend accesses to the I2S_1 and I2S_2 registers
atomic_bitops.txt
=============
Atomic bitops
=============
While our bitmap_{}() functions are non-atomic, we have a number of operations
operating on single bits in a bitmap that are atomic.
API
---
The single bit operations are:
Non-RMW ops:
test_bit()
RMW atomic operations without return value:
{set,clear,change}_bit()
clear_bit_unlock()
RMW atomic operations with return value:
test_and_{set,clear,change}_bit()
test_and_set_bit_lock()
Barriers:
smp_mb__{before,after}_atomic()
All RMW atomic operations have a '__' prefixed variant which is non-atomic.
SEMANTICS
---------
Non-atomic ops:
In particular __clear_bit_unlock() suffers the same issue as atomic_set(),
which is why the generic version maps to clear_bit_unlock(), see atomic_t.txt.
RMW ops:
The test_and_{}_bit() operations return the original value of the bit.
ORDERING
--------
Like with atomic_t, the rule of thumb is:
- non-RMW operations are unordered;
- RMW operations that have no return value are unordered;
- RMW operations that have a return value are fully ordered.
- RMW operations that are conditional are unordered on FAILURE,
otherwise the above rules apply. In the case of test_and_{}_bit() operations,
if the bit in memory is unchanged by the operation then it is deemed to have
failed.
Except for a successful test_and_set_bit_lock() which has ACQUIRE semantics and
clear_bit_unlock() which has RELEASE semantics.
Since a platform only has a single means of achieving atomic operations
the same barriers as for atomic_t are used, see atomic_t.txt.
Computing file changes ...
