ALSA: info: Make snd_info_entry_ops as const

The reference to snd_info_entry_ops is rather read-only, so declare it
as a const pointer. This allows a bit more optimization.

There should be no functional changes by this patch.

Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Takashi Iwai <[e-mail]>

Documentation/sound/kernel-api/writing-an-alsa-driver.rst

···
 
 ::
 
-  static struct snd_info_entry_ops my_file_io_ops = {
+  static const struct snd_info_entry_ops my_file_io_ops = {
           .read = my_file_io_read,
   };
 

include/sound/info.h

···
 	unsigned short content;
 	union {
 		struct snd_info_entry_text text;
-		struct snd_info_entry_ops *ops;
+		const struct snd_info_entry_ops *ops;
 	} c;
 	struct snd_info_entry *parent;
 	struct module *module;

sound/drivers/opl4/opl4_proc.c

···
 	return count;
 }
 
-static struct snd_info_entry_ops snd_opl4_mem_proc_ops = {
+static const struct snd_info_entry_ops snd_opl4_mem_proc_ops = {
 	.open = snd_opl4_mem_proc_open,
 	.release = snd_opl4_mem_proc_release,
 	.read = snd_opl4_mem_proc_read,

sound/isa/gus/gus_mem_proc.c

···
 	kfree(priv);
 }
 
-static struct snd_info_entry_ops snd_gf1_mem_proc_ops = {
+static const struct snd_info_entry_ops snd_gf1_mem_proc_ops = {
 	.read = snd_gf1_mem_proc_dump,
 };
 

sound/pci/cs4281.c

···
 	return count;
 }
 
-static struct snd_info_entry_ops snd_cs4281_proc_ops_BA0 = {
+static const struct snd_info_entry_ops snd_cs4281_proc_ops_BA0 = {
 	.read = snd_cs4281_BA0_read,
 };
 
-static struct snd_info_entry_ops snd_cs4281_proc_ops_BA1 = {
+static const struct snd_info_entry_ops snd_cs4281_proc_ops_BA1 = {
 	.read = snd_cs4281_BA1_read,
 };
 

sound/pci/cs46xx/cs46xx_lib.c

···
 	return count;
 }
 
-static struct snd_info_entry_ops snd_cs46xx_proc_io_ops = {
+static const struct snd_info_entry_ops snd_cs46xx_proc_io_ops = {
 	.read = snd_cs46xx_io_read,
 };
 

sound/pci/emu10k1/emuproc.c

···
 }
 #endif
 
-static struct snd_info_entry_ops snd_emu10k1_proc_ops_fx8010 = {
+static const struct snd_info_entry_ops snd_emu10k1_proc_ops_fx8010 = {
 	.read = snd_emu10k1_fx8010_read,
 };
 

sound/pci/mixart/mixart.c

···
 	return count;
 }
 
-static struct snd_info_entry_ops snd_mixart_proc_ops_BA0 = {
+static const struct snd_info_entry_ops snd_mixart_proc_ops_BA0 = {
 	.read   = snd_mixart_BA0_read,
 };
 
-static struct snd_info_entry_ops snd_mixart_proc_ops_BA1 = {
+static const struct snd_info_entry_ops snd_mixart_proc_ops_BA1 = {
 	.read   = snd_mixart_BA1_read,
 };