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ALSA: ac97: Treat snd_ac97_bus_ops as const
This is a preliminary patch to allow const for snd_ac97_bus_ops definitions in each driver's code. The ops reference is read-only, hence it can be declared as const for further optimization. There should be no functional changes by this patch. Link: https://lore.kernel.org/r/20200103081714.9560-23-tiwai@suse.de Signed-off-by: Takashi Iwai <tiwai@suse.de>
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@ -197,7 +197,7 @@ struct snd_ac97_bus_ops {
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struct snd_ac97_bus {
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/* -- lowlevel (hardware) driver specific -- */
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struct snd_ac97_bus_ops *ops;
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const struct snd_ac97_bus_ops *ops;
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void *private_data;
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void (*private_free) (struct snd_ac97_bus *bus);
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/* --- */
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@ -310,7 +310,8 @@ static inline int ac97_can_spdif(struct snd_ac97 * ac97)
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/* functions */
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/* create new AC97 bus */
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int snd_ac97_bus(struct snd_card *card, int num, struct snd_ac97_bus_ops *ops,
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int snd_ac97_bus(struct snd_card *card, int num,
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const struct snd_ac97_bus_ops *ops,
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void *private_data, struct snd_ac97_bus **rbus);
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/* create mixer controls */
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int snd_ac97_mixer(struct snd_ac97_bus *bus, struct snd_ac97_template *template,
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@ -55,7 +55,7 @@ static bool snd_ac97_check_id(struct snd_ac97 *ac97, unsigned int id,
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int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id,
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unsigned int id_mask)
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{
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struct snd_ac97_bus_ops *ops = ac97->bus->ops;
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const struct snd_ac97_bus_ops *ops = ac97->bus->ops;
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if (try_warm && ops->warm_reset) {
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ops->warm_reset(ac97);
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@ -1894,7 +1894,8 @@ static int ac97_reset_wait(struct snd_ac97 *ac97, int timeout, int with_modem)
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*
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* Return: Zero if successful, or a negative error code on failure.
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*/
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int snd_ac97_bus(struct snd_card *card, int num, struct snd_ac97_bus_ops *ops,
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int snd_ac97_bus(struct snd_card *card, int num,
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const struct snd_ac97_bus_ops *ops,
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void *private_data, struct snd_ac97_bus **rbus)
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{
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int err;
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