[03/58] ALSA: core: Treat snd_device_ops as const
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Message ID 20200103081714.9560-4-tiwai@suse.de
State New
Headers show
Series
  • ALSA: Constifications
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Commit Message

Takashi Iwai Jan. 3, 2020, 8:16 a.m. UTC
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.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 include/sound/core.h | 4 ++--
 sound/core/device.c  | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

Patch
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diff --git a/include/sound/core.h b/include/sound/core.h
index af3dce956c17..0e14b7a3e67b 100644
--- a/include/sound/core.h
+++ b/include/sound/core.h
@@ -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);
diff --git a/sound/core/device.c b/sound/core/device.c
index 708b91944de3..cdc5af526739 100644
--- a/sound/core/device.c
+++ b/sound/core/device.c
@@ -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;