WSL2-Linux-Kernel/include/sound
Gustavo A. R. Silva 2d6201ee11
ASoC: soc-core: Replace zero-length array with flexible-array
The current codebase makes use of the zero-length array language
extension to the C90 standard, but the preferred mechanism to declare
variable-length types such as these ones is a flexible array member[1][2],
introduced in C99:

struct foo {
        int stuff;
        struct boo array[];
};

By making use of the mechanism above, we will get a compiler warning
in case the flexible array does not occur last in the structure, which
will help us prevent some kind of undefined behavior bugs from being
inadvertently introduced[3] to the codebase from now on.

Also, notice that, dynamic memory allocations won't be affected by
this change:

"Flexible array members have incomplete type, and so the sizeof operator
may not be applied. As a quirk of the original implementation of
zero-length arrays, sizeof evaluates to zero."[1]

sizeof(flexible-array-member) triggers a warning because flexible array
members have incomplete type[1]. There are some instances of code in
which the sizeof operator is being incorrectly/erroneously applied to
zero-length arrays and the result is zero. Such instances may be hiding
some bugs. So, this work (flexible-array member conversions) will also
help to get completely rid of those sorts of issues.

This issue was found with the help of Coccinelle.

[1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
[2] https://github.com/KSPP/linux/issues/21
[3] commit 7649773293 ("cxgb3/l2t: Fix undefined behaviour")

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/20200507192228.GA16355@embeddedor
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-05-08 11:28:48 +01:00
..
ac97
sof ASoC: SOF/Intel: clarify SPDX license with GPL-2.0-only 2020-05-01 17:45:24 +01:00
ac97_codec.h
aci.h
ad1816a.h
ad1843.h
adau1373.h
ak4xxx-adda.h
ak4113.h
ak4114.h
ak4117.h
ak4531_codec.h
ak4641.h
alc5623.h
asequencer.h
asound.h
asoundef.h
compress_driver.h ALSA: core: Implement compress page allocation and free routines 2020-02-18 21:52:05 +00:00
control.h
core.h ALSA: core: Add snd_device_get_state() helper 2020-03-23 18:09:19 +01:00
cs35l33.h
cs35l34.h
cs35l35.h
cs35l36.h
cs42l52.h
cs42l56.h
cs42l73.h
cs4231-regs.h
cs4271.h
cs8403.h
cs8427.h
da7213.h
da7218.h
da7219-aad.h
da7219.h
da9055.h
designware_i2s.h
dmaengine_pcm.h
emu10k1.h
emu10k1_synth.h
emu8000.h
emu8000_reg.h
emux_legacy.h
emux_synth.h
es1688.h
gus.h
hda_chmap.h
hda_codec.h
hda_component.h
hda_hwdep.h
hda_i915.h
hda_register.h
hda_regmap.h
hda_verbs.h
hdaudio.h ASoC: SOF: Intel: Account for compress streams when servicing IRQs 2020-02-18 21:52:06 +00:00
hdaudio_ext.h
hdmi-codec.h
hwdep.h
i2c.h
info.h
initval.h
intel-dsp-config.h
intel-nhlt.h
jack.h
l3.h
madera-pdata.h
max9768.h
max98088.h
max98090.h
max98095.h
memalloc.h
minors.h
mixer_oss.h
mpu401.h
omap-hdmi-audio.h
opl3.h
opl4.h
pcm-indirect.h
pcm.h ASoC: Updates for v5.7 2020-03-30 13:43:00 +02:00
pcm_drm_eld.h
pcm_iec958.h
pcm_oss.h
pcm_params.h
pt2258.h
pxa2xx-lib.h
rawmidi.h ALSA: rawmidi: Avoid bit fields for state flags 2020-02-14 15:53:19 +01:00
rt286.h
rt298.h
rt5514.h
rt5645.h
rt5659.h
rt5660.h
rt5663.h
rt5665.h
rt5668.h
rt5670.h
rt5682.h ASoC: rt5682: Add a property for DMIC delay 2020-03-23 18:17:24 +00:00
s3c24xx_uda134x.h
sb.h
sb16_csp.h
seq_device.h
seq_kernel.h
seq_midi_emul.h
seq_midi_event.h
seq_oss.h
seq_oss_legacy.h
seq_virmidi.h
sh_dac_audio.h
sh_fsi.h
simple_card.h
simple_card_utils.h
snd_wavefront.h
soc-acpi-intel-match.h
soc-acpi.h ASoC: SOF/Intel: clarify SPDX license with GPL-2.0-only 2020-05-01 17:45:24 +01:00
soc-component.h ASoC: soc-compress: remove snd_compr_ops 2020-04-21 19:02:00 +01:00
soc-dai.h ASoC: soc-dai: add snd_soc_dai_compr_get_metadata() 2020-04-29 13:27:50 +01:00
soc-dapm.h ASoC: soc-core: Replace zero-length array with flexible-array 2020-05-08 11:28:48 +01:00
soc-dpcm.h ASoC: export DPCM runtime update functions 2020-03-12 13:30:38 +00:00
soc-topology.h
soc.h ASoC: soc-core: Replace zero-length array with flexible-array 2020-05-08 11:28:48 +01:00
sof.h ASoC: SOF/Intel: clarify SPDX license with GPL-2.0-only 2020-05-01 17:45:24 +01:00
soundfont.h
spear_dma.h
spear_spdif.h
sta32x.h
sta350.h
tas2552-plat.h
tas5086.h
tea6330t.h
timer.h
tlv.h
tlv320aic3x.h
tlv320aic32x4.h
tlv320dac33-plat.h
tpa6130a2-plat.h
uda134x.h
uda1380.h
util_mem.h
vx_core.h
wavefront.h
wm0010.h
wm1250-ev1.h
wm2000.h
wm2200.h
wm5100.h
wm8903.h
wm8904.h
wm8955.h
wm8960.h
wm8962.h
wm8993.h
wm8996.h
wm9081.h
wm9090.h
wss.h