X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=sound%2Fcore%2Fsound.c;h=cd862728346cb03e74abe870f4a997c0e5fa6de7;hb=71d530cd1b6d97094481002a04c77fea1c8e1c22;hp=a8eda02bcf1c0fe886b922ac0b628f7152a52921;hpb=944d79559d154c12becde0dab327016cf438f46c;p=linux-2.6 diff --git a/sound/core/sound.c b/sound/core/sound.c index a8eda02bcf..cd86272834 100644 --- a/sound/core/sound.c +++ b/sound/core/sound.c @@ -33,11 +33,14 @@ #include #include #include +#include #define SNDRV_OS_MINORS 256 static int major = CONFIG_SND_MAJOR; int snd_major; +EXPORT_SYMBOL(snd_major); + static int cards_limit = 1; static int device_mode = S_IFCHR | S_IRUGO | S_IWUGO; @@ -59,9 +62,10 @@ MODULE_ALIAS_CHARDEV_MAJOR(CONFIG_SND_MAJOR); * modules are loaded manually, this limit number increases, too. */ int snd_ecards_limit; +EXPORT_SYMBOL(snd_ecards_limit); static struct snd_minor *snd_minors[SNDRV_OS_MINORS]; -static DECLARE_MUTEX(sound_mutex); +static DEFINE_MUTEX(sound_mutex); extern struct class *sound_class; @@ -77,20 +81,17 @@ extern struct class *sound_class; */ void snd_request_card(int card) { - int locked; - if (! current->fs->root) return; - read_lock(&snd_card_rwlock); - locked = snd_cards_lock & (1 << card); - read_unlock(&snd_card_rwlock); - if (locked) + if (snd_card_locked(card)) return; if (card < 0 || card >= cards_limit) return; request_module("snd-card-%i", card); } +EXPORT_SYMBOL(snd_request_card); + static void snd_request_other(int minor) { char *str; @@ -120,26 +121,28 @@ void *snd_lookup_minor_data(unsigned int minor, int type) struct snd_minor *mreg; void *private_data; - if (minor > ARRAY_SIZE(snd_minors)) + if (minor >= ARRAY_SIZE(snd_minors)) return NULL; - down(&sound_mutex); + mutex_lock(&sound_mutex); mreg = snd_minors[minor]; if (mreg && mreg->type == type) private_data = mreg->private_data; else private_data = NULL; - up(&sound_mutex); + mutex_unlock(&sound_mutex); return private_data; } +EXPORT_SYMBOL(snd_lookup_minor_data); + static int snd_open(struct inode *inode, struct file *file) { unsigned int minor = iminor(inode); struct snd_minor *mptr = NULL; - struct file_operations *old_fops; + const struct file_operations *old_fops; int err = 0; - if (minor > ARRAY_SIZE(snd_minors)) + if (minor >= ARRAY_SIZE(snd_minors)) return -ENODEV; mptr = snd_minors[minor]; if (mptr == NULL) { @@ -239,7 +242,7 @@ static int snd_kernel_minor(int type, struct snd_card *card, int dev) * Retrurns zero if successful, or a negative error code on failure. */ int snd_register_device(int type, struct snd_card *card, int dev, - struct file_operations *f_ops, void *private_data, + const struct file_operations *f_ops, void *private_data, const char *name) { int minor; @@ -256,7 +259,7 @@ int snd_register_device(int type, struct snd_card *card, int dev, preg->f_ops = f_ops; preg->private_data = private_data; strcpy(preg->name, name); - down(&sound_mutex); + mutex_lock(&sound_mutex); #ifdef CONFIG_SND_DYNAMIC_MINORS minor = snd_find_free_minor(); #else @@ -265,7 +268,7 @@ int snd_register_device(int type, struct snd_card *card, int dev, minor = -EBUSY; #endif if (minor < 0) { - up(&sound_mutex); + mutex_unlock(&sound_mutex); kfree(preg); return minor; } @@ -276,10 +279,12 @@ int snd_register_device(int type, struct snd_card *card, int dev, device = card->dev; class_device_create(sound_class, NULL, MKDEV(major, minor), device, "%s", name); - up(&sound_mutex); + mutex_unlock(&sound_mutex); return 0; } +EXPORT_SYMBOL(snd_register_device); + /** * snd_unregister_device - unregister the device on the given card * @type: the device type, SNDRV_DEVICE_TYPE_XXX @@ -297,7 +302,7 @@ int snd_unregister_device(int type, struct snd_card *card, int dev) struct snd_minor *mptr; cardnum = card ? card->number : -1; - down(&sound_mutex); + mutex_lock(&sound_mutex); for (minor = 0; minor < ARRAY_SIZE(snd_minors); ++minor) if ((mptr = snd_minors[minor]) != NULL && mptr->type == type && @@ -305,7 +310,7 @@ int snd_unregister_device(int type, struct snd_card *card, int dev) mptr->device == dev) break; if (minor == ARRAY_SIZE(snd_minors)) { - up(&sound_mutex); + mutex_unlock(&sound_mutex); return -EINVAL; } @@ -315,17 +320,19 @@ int snd_unregister_device(int type, struct snd_card *card, int dev) class_device_destroy(sound_class, MKDEV(major, minor)); snd_minors[minor] = NULL; - up(&sound_mutex); + mutex_unlock(&sound_mutex); kfree(mptr); return 0; } +EXPORT_SYMBOL(snd_unregister_device); + #ifdef CONFIG_PROC_FS /* * INFO PART */ -static struct snd_info_entry *snd_minor_info_entry = NULL; +static struct snd_info_entry *snd_minor_info_entry; static const char *snd_device_type_name(int type) { @@ -354,7 +361,7 @@ static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_bu int minor; struct snd_minor *mptr; - down(&sound_mutex); + mutex_lock(&sound_mutex); for (minor = 0; minor < SNDRV_OS_MINORS; ++minor) { if (!(mptr = snd_minors[minor])) continue; @@ -371,7 +378,7 @@ static void snd_minor_info_read(struct snd_info_entry *entry, struct snd_info_bu snd_iprintf(buffer, "%3i: : %s\n", minor, snd_device_type_name(mptr->type)); } - up(&sound_mutex); + mutex_unlock(&sound_mutex); } int __init snd_minor_info_init(void) @@ -380,7 +387,6 @@ int __init snd_minor_info_init(void) entry = snd_info_create_module_entry(THIS_MODULE, "devices", NULL); if (entry) { - entry->c.text.read_size = PAGE_SIZE; entry->c.text.read = snd_minor_info_read; if (snd_info_register(entry) < 0) { snd_info_free_entry(entry); @@ -445,91 +451,3 @@ static void __exit alsa_sound_exit(void) module_init(alsa_sound_init) module_exit(alsa_sound_exit) - - /* sound.c */ -EXPORT_SYMBOL(snd_major); -EXPORT_SYMBOL(snd_ecards_limit); -#if defined(CONFIG_KMOD) -EXPORT_SYMBOL(snd_request_card); -#endif -EXPORT_SYMBOL(snd_register_device); -EXPORT_SYMBOL(snd_unregister_device); -EXPORT_SYMBOL(snd_lookup_minor_data); -#if defined(CONFIG_SND_OSSEMUL) -EXPORT_SYMBOL(snd_register_oss_device); -EXPORT_SYMBOL(snd_unregister_oss_device); -EXPORT_SYMBOL(snd_lookup_oss_minor_data); -#endif - /* memory.c */ -EXPORT_SYMBOL(copy_to_user_fromio); -EXPORT_SYMBOL(copy_from_user_toio); - /* init.c */ -EXPORT_SYMBOL(snd_cards); -#if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE) -EXPORT_SYMBOL(snd_mixer_oss_notify_callback); -#endif -EXPORT_SYMBOL(snd_card_new); -EXPORT_SYMBOL(snd_card_disconnect); -EXPORT_SYMBOL(snd_card_free); -EXPORT_SYMBOL(snd_card_free_in_thread); -EXPORT_SYMBOL(snd_card_register); -EXPORT_SYMBOL(snd_component_add); -EXPORT_SYMBOL(snd_card_file_add); -EXPORT_SYMBOL(snd_card_file_remove); -#ifdef CONFIG_PM -EXPORT_SYMBOL(snd_power_wait); -#endif - /* device.c */ -EXPORT_SYMBOL(snd_device_new); -EXPORT_SYMBOL(snd_device_register); -EXPORT_SYMBOL(snd_device_free); - /* isadma.c */ -#ifdef CONFIG_ISA_DMA_API -EXPORT_SYMBOL(snd_dma_program); -EXPORT_SYMBOL(snd_dma_disable); -EXPORT_SYMBOL(snd_dma_pointer); -#endif - /* info.c */ -#ifdef CONFIG_PROC_FS -EXPORT_SYMBOL(snd_seq_root); -EXPORT_SYMBOL(snd_iprintf); -EXPORT_SYMBOL(snd_info_get_line); -EXPORT_SYMBOL(snd_info_get_str); -EXPORT_SYMBOL(snd_info_create_module_entry); -EXPORT_SYMBOL(snd_info_create_card_entry); -EXPORT_SYMBOL(snd_info_free_entry); -EXPORT_SYMBOL(snd_info_register); -EXPORT_SYMBOL(snd_info_unregister); -EXPORT_SYMBOL(snd_card_proc_new); -#endif - /* info_oss.c */ -#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS) -EXPORT_SYMBOL(snd_oss_info_register); -#endif - /* control.c */ -EXPORT_SYMBOL(snd_ctl_new); -EXPORT_SYMBOL(snd_ctl_new1); -EXPORT_SYMBOL(snd_ctl_free_one); -EXPORT_SYMBOL(snd_ctl_add); -EXPORT_SYMBOL(snd_ctl_remove); -EXPORT_SYMBOL(snd_ctl_remove_id); -EXPORT_SYMBOL(snd_ctl_rename_id); -EXPORT_SYMBOL(snd_ctl_find_numid); -EXPORT_SYMBOL(snd_ctl_find_id); -EXPORT_SYMBOL(snd_ctl_notify); -EXPORT_SYMBOL(snd_ctl_register_ioctl); -EXPORT_SYMBOL(snd_ctl_unregister_ioctl); -#ifdef CONFIG_COMPAT -EXPORT_SYMBOL(snd_ctl_register_ioctl_compat); -EXPORT_SYMBOL(snd_ctl_unregister_ioctl_compat); -#endif -EXPORT_SYMBOL(snd_ctl_elem_read); -EXPORT_SYMBOL(snd_ctl_elem_write); - /* misc.c */ -EXPORT_SYMBOL(release_and_free_resource); -#ifdef CONFIG_SND_VERBOSE_PRINTK -EXPORT_SYMBOL(snd_verbose_printk); -#endif -#if defined(CONFIG_SND_DEBUG) && defined(CONFIG_SND_VERBOSE_PRINTK) -EXPORT_SYMBOL(snd_verbose_printd); -#endif