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.
Signed-off-by: Takashi Iwai tiwai@suse.de --- include/sound/ac97_codec.h | 5 +++-- sound/ac97_bus.c | 2 +- sound/pci/ac97/ac97_codec.c | 3 ++- 3 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/include/sound/ac97_codec.h b/include/sound/ac97_codec.h index cc383991c0fe..49200ec26dc4 100644 --- a/include/sound/ac97_codec.h +++ b/include/sound/ac97_codec.h @@ -197,7 +197,7 @@ struct snd_ac97_bus_ops {
struct snd_ac97_bus { /* -- lowlevel (hardware) driver specific -- */ - struct snd_ac97_bus_ops *ops; + const struct snd_ac97_bus_ops *ops; void *private_data; void (*private_free) (struct snd_ac97_bus *bus); /* --- */ @@ -310,7 +310,8 @@ static inline int ac97_can_spdif(struct snd_ac97 * ac97)
/* functions */ /* create new AC97 bus */ -int snd_ac97_bus(struct snd_card *card, int num, struct snd_ac97_bus_ops *ops, +int snd_ac97_bus(struct snd_card *card, int num, + const struct snd_ac97_bus_ops *ops, void *private_data, struct snd_ac97_bus **rbus); /* create mixer controls */ int snd_ac97_mixer(struct snd_ac97_bus *bus, struct snd_ac97_template *template, diff --git a/sound/ac97_bus.c b/sound/ac97_bus.c index 3732a63a2a81..b4685c53ff11 100644 --- a/sound/ac97_bus.c +++ b/sound/ac97_bus.c @@ -55,7 +55,7 @@ static bool snd_ac97_check_id(struct snd_ac97 *ac97, unsigned int id, int snd_ac97_reset(struct snd_ac97 *ac97, bool try_warm, unsigned int id, unsigned int id_mask) { - struct snd_ac97_bus_ops *ops = ac97->bus->ops; + const struct snd_ac97_bus_ops *ops = ac97->bus->ops;
if (try_warm && ops->warm_reset) { ops->warm_reset(ac97); diff --git a/sound/pci/ac97/ac97_codec.c b/sound/pci/ac97/ac97_codec.c index 41bdec4249e1..fcfa8499e453 100644 --- a/sound/pci/ac97/ac97_codec.c +++ b/sound/pci/ac97/ac97_codec.c @@ -1894,7 +1894,8 @@ static int ac97_reset_wait(struct snd_ac97 *ac97, int timeout, int with_modem) * * Return: Zero if successful, or a negative error code on failure. */ -int snd_ac97_bus(struct snd_card *card, int num, struct snd_ac97_bus_ops *ops, +int snd_ac97_bus(struct snd_card *card, int num, + const struct snd_ac97_bus_ops *ops, void *private_data, struct snd_ac97_bus **rbus) { int err;