Commit 8b575824 authored by Takashi Iwai's avatar Takashi Iwai
Browse files

ALSA: core: Treat snd_device_ops as const 

This is a preliminary patch to allow const for snd_device_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/20200103081714.9560-4-tiwai@suse.de


Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
parent 2ead9d08

include/sound/core.h

+2 −2
Original line number Diff line number Diff line
@@ -69,7 +69,7 @@ struct snd_device { 
	enum snd_device_state state;	/* state of the device */

	enum snd_device_type type;	/* device type */

	void *device_data;		/* device structure */

	struct snd_device_ops *ops;	/* operations */

	const struct snd_device_ops *ops;	/* operations */

};



#define snd_device(n) list_entry(n, struct snd_device, list)
@@ -256,7 +256,7 @@ static inline void snd_card_unref(struct snd_card *card) 
/* device.c */



int snd_device_new(struct snd_card *card, enum snd_device_type type,

		   void *device_data, struct snd_device_ops *ops);

		   void *device_data, const struct snd_device_ops *ops);

int snd_device_register(struct snd_card *card, void *device_data);

int snd_device_register_all(struct snd_card *card);

void snd_device_disconnect(struct snd_card *card, void *device_data);

sound/core/device.c

+1 −1
Original line number Diff line number Diff line
@@ -27,7 +27,7 @@ 
 * Return: Zero if successful, or a negative error code on failure.

 */

int snd_device_new(struct snd_card *card, enum snd_device_type type,

		   void *device_data, struct snd_device_ops *ops)

		   void *device_data, const struct snd_device_ops *ops)

{

	struct snd_device *dev;

	struct list_head *p;