diff options
| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-12-19 16:34:46 +0300 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2023-12-30 12:10:41 +0300 |
| commit | 66e82d219924f6112509f7e8f8e687fcc81a16e3 (patch) | |
| tree | 1b6b2906f607cd81e85583a94ee6a0e5e4ee44ac | |
| parent | 64bf8dec54cfe57f416884a6b3d54c7f4259e93f (diff) | |
| download | linux-66e82d219924f6112509f7e8f8e687fcc81a16e3.tar.xz | |
ALSA: mark all struct bus_type as const
Now that the driver core can properly handle constant struct bus_type,
move all of the sound subsystem struct bus_type structures as const,
placing them into read-only memory which can not be modified at runtime.
Note, this fixes a duplicate definition of ac97_bus_type, which somehow
was declared extern in a .h file, and then static as a prototype in a .c
file, and then properly later on in the same .c file. Amazing that no
compiler warning ever showed up for this.
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.com>
Cc: Dawei Li <set_pte_at@outlook.com>
Cc: Yu Liao <liaoyu15@huawei.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: linux-sound@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/2023121945-immersion-budget-d0aa@gregkh
Signed-off-by: Takashi Iwai <tiwai@suse.de>
| -rw-r--r-- | include/sound/ac97_codec.h | 2 | ||||
| -rw-r--r-- | include/sound/hdaudio.h | 2 | ||||
| -rw-r--r-- | sound/ac97/bus.c | 2 | ||||
| -rw-r--r-- | sound/ac97_bus.c | 2 | ||||
| -rw-r--r-- | sound/hda/hda_bus_type.c | 2 |
5 files changed, 4 insertions, 6 deletions
diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h index c495c6d5fbe0..4bd3be3a3192 100644 --- a/include/sound/ac97_codec.h +++ b/include/sound/ac97_codec.h @@ -410,7 +410,7 @@ int snd_ac97_pcm_close(struct ac97_pcm *pcm); int snd_ac97_pcm_double_rate_rules(struct snd_pcm_runtime *runtime); /* ad hoc AC97 device driver access */ -extern struct bus_type ac97_bus_type; +extern const struct bus_type ac97_bus_type; /* AC97 platform_data adding function */ static inline void snd_ac97_dev_add_pdata(struct snd_ac97 *ac97, void *data) diff --git a/include/sound/hdaudio.h b/include/sound/hdaudio.h index 62a3cd154ff2..a73d7f34f4e5 100644 --- a/include/sound/hdaudio.h +++ b/include/sound/hdaudio.h @@ -33,7 +33,7 @@ struct hda_device_id; /* * exported bus type */ -extern struct bus_type snd_hda_bus_type; +extern const struct bus_type snd_hda_bus_type; /* * generic arrays diff --git a/sound/ac97/bus.c b/sound/ac97/bus.c index 3173e9d98927..1dc7965eb14b 100644 --- a/sound/ac97/bus.c +++ b/sound/ac97/bus.c @@ -28,8 +28,6 @@ static DEFINE_MUTEX(ac97_controllers_mutex); static DEFINE_IDR(ac97_adapter_idr); static LIST_HEAD(ac97_controllers); -static struct bus_type ac97_bus_type; - static inline struct ac97_controller* to_ac97_controller(struct device *ac97_adapter) { diff --git a/sound/ac97_bus.c b/sound/ac97_bus.c index c7aee8c42c55..7ea274c55900 100644 --- a/sound/ac97_bus.c +++ b/sound/ac97_bus.c @@ -75,7 +75,7 @@ int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id, } EXPORT_SYMBOL_GPL(snd_ac97_reset); -struct bus_type ac97_bus_type = { +const struct bus_type ac97_bus_type = { .name = "ac97", }; diff --git a/sound/hda/hda_bus_type.c b/sound/hda/hda_bus_type.c index 4cd94178df9f..cce2c30511a2 100644 --- a/sound/hda/hda_bus_type.c +++ b/sound/hda/hda_bus_type.c @@ -76,7 +76,7 @@ static int hda_uevent(const struct device *dev, struct kobj_uevent_env *env) return 0; } -struct bus_type snd_hda_bus_type = { +const struct bus_type snd_hda_bus_type = { .name = "hdaudio", .match = hda_bus_match, .uevent = hda_uevent, |