[ALSA] Optimize for config without PROC_FS

Modules: HWDEP Midlevel,ALSA Core,PCM Midlevel,Timer Midlevel

Optimize the code when compiled without CONFIG_PROC_FS.
Signed-off-by: Takashi Iwai <tiwai@suse.de>

include/sound/info.h

@@ -87,8 +87,6 @@ struct snd_info_entry {
 	struct semaphore access;
 };
 
-int snd_info_check_reserved_words(const char *str);
-
 #if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
 int snd_info_minor_register(void);
 int snd_info_minor_unregister(void);
@@ -142,6 +140,7 @@ static inline void snd_info_set_text_ops(struct snd_info_entry *entry,
 	entry->c.text.read = read;
 }
 
+int snd_info_check_reserved_words(const char *str);
 
 #else
 
@@ -164,8 +163,14 @@ static inline int snd_info_card_free(struct snd_card * card) { return 0; }
 static inline int snd_info_register(struct snd_info_entry * entry) { return 0; }
 static inline int snd_info_unregister(struct snd_info_entry * entry) { return 0; }
 
-#define snd_card_proc_new(card,name,entryp)  0 /* always success */
-#define snd_info_set_text_ops(entry,private_data,read_size,read) /*NOP*/
+static inline int snd_card_proc_new(struct snd_card *card, const char *name,
+				    struct snd_info_entry **entryp) { return -EINVAL; }
+static inline void snd_info_set_text_ops(struct snd_info_entry *entry __attribute__((unused)),
+					 void *private_data,
+					 long read_size,
+					 void (*read)(struct snd_info_entry *, struct snd_info_buffer *)) {}
+
+static inline int snd_info_check_reserved_words(const char *str) { return 1; }
 
 #endif
 

sound/core/hwdep.c

@@ -458,6 +458,7 @@ static int snd_hwdep_dev_unregister(struct snd_device *device)
 	return snd_hwdep_free(hwdep);
 }
 
+#ifdef CONFIG_PROC_FS
 /*
  *  Info interface
  */
@@ -477,13 +478,9 @@ static void snd_hwdep_proc_read(struct snd_info_entry *entry,
 	up(&register_mutex);
 }
 
-/*
- *  ENTRY functions
- */
+static struct snd_info_entry *snd_hwdep_proc_entry;
 
-static struct snd_info_entry *snd_hwdep_proc_entry = NULL;
-
-static int __init alsa_hwdep_init(void)
+static void __init snd_hwdep_proc_init(void)
 {
 	struct snd_info_entry *entry;
 
@@ -496,6 +493,25 @@ static int __init alsa_hwdep_init(void)
 		}
 	}
 	snd_hwdep_proc_entry = entry;
+}
+
+static void __exit snd_hwdep_proc_done(void)
+{
+	snd_info_unregister(snd_hwdep_proc_entry);
+}
+#else /* !CONFIG_PROC_FS */
+#define snd_hwdep_proc_init()
+#define snd_hwdep_proc_done()
+#endif /* CONFIG_PROC_FS */
+
+
+/*
+ *  ENTRY functions
+ */
+
+static int __init alsa_hwdep_init(void)
+{
+	snd_hwdep_proc_init();
 	snd_ctl_register_ioctl(snd_hwdep_control_ioctl);
 	snd_ctl_register_ioctl_compat(snd_hwdep_control_ioctl);
 	return 0;
@@ -505,10 +521,7 @@ static void __exit alsa_hwdep_exit(void)
 {
 	snd_ctl_unregister_ioctl(snd_hwdep_control_ioctl);
 	snd_ctl_unregister_ioctl_compat(snd_hwdep_control_ioctl);
-	if (snd_hwdep_proc_entry) {
-		snd_info_unregister(snd_hwdep_proc_entry);
-		snd_hwdep_proc_entry = NULL;
-	}
+	snd_hwdep_proc_done();
 }
 
 module_init(alsa_hwdep_init)

sound/core/info.c

@@ -37,6 +37,8 @@
  *
  */
 
+#ifdef CONFIG_PROC_FS
+
 int snd_info_check_reserved_words(const char *str)
 {
 	static char *reserved[] =
@@ -66,8 +68,6 @@ int snd_info_check_reserved_words(const char *str)
 	return 1;
 }
 
-#ifdef CONFIG_PROC_FS
-
 static DECLARE_MUTEX(info_mutex);
 
 struct snd_info_private_data {
@@ -580,12 +580,10 @@ int __exit snd_info_done(void)
 	snd_info_version_done();
 	if (snd_proc_root) {
 #if defined(CONFIG_SND_SEQUENCER) || defined(CONFIG_SND_SEQUENCER_MODULE)
-		if (snd_seq_root)
-			snd_info_unregister(snd_seq_root);
+		snd_info_unregister(snd_seq_root);
 #endif
 #ifdef CONFIG_SND_OSSEMUL
-		if (snd_oss_root)
-			snd_info_unregister(snd_oss_root);
+		snd_info_unregister(snd_oss_root);
 #endif
 		snd_remove_proc_entry(&proc_root, snd_proc_root);
 	}
@@ -937,7 +935,8 @@ int snd_info_unregister(struct snd_info_entry * entry)
 {
 	struct proc_dir_entry *root;
 
-	snd_assert(entry != NULL, return -ENXIO);
+	if (! entry)
+		return 0;
 	snd_assert(entry->p != NULL, return -ENXIO);
 	root = entry->parent == NULL ? snd_proc_root : entry->parent->p;
 	snd_assert(root, return -ENXIO);

sound/core/init.c

@@ -46,12 +46,39 @@ DEFINE_RWLOCK(snd_card_rwlock);
 int (*snd_mixer_oss_notify_callback)(struct snd_card *card, int free_flag);
 #endif
 
+#ifdef CONFIG_PROC_FS
 static void snd_card_id_read(struct snd_info_entry *entry,
 			     struct snd_info_buffer *buffer)
 {
 	snd_iprintf(buffer, "%s\n", entry->card->id);
 }
 
+static inline int init_info_for_card(struct snd_card *card)
+{
+	int err;
+	struct snd_info_entry *entry;
+
+	if ((err = snd_info_card_register(card)) < 0) {
+		snd_printd("unable to create card info\n");
+		return err;
+	}
+	if ((entry = snd_info_create_card_entry(card, "id", card->proc_root)) == NULL) {
+		snd_printd("unable to create card entry\n");
+		return err;
+	}
+	entry->c.text.read_size = PAGE_SIZE;
+	entry->c.text.read = snd_card_id_read;
+	if (snd_info_register(entry) < 0) {
+		snd_info_free_entry(entry);
+		entry = NULL;
+	}
+	card->proc_id = entry;
+	return 0;
+}
+#else /* !CONFIG_PROC_FS */
+#define init_info_for_card(card)
+#endif
+
 static void snd_card_free_thread(void * __card);
 
 /**
@@ -273,8 +300,7 @@ int snd_card_free(struct snd_card *card)
 	}
 	if (card->private_free)
 		card->private_free(card);
-	if (card->proc_id)
-		snd_info_unregister(card->proc_id);
+	snd_info_unregister(card->proc_id);
 	if (snd_info_card_free(card) < 0) {
 		snd_printk(KERN_WARNING "unable to free card info\n");
 		/* Not fatal error */
@@ -414,7 +440,6 @@ static void choose_default_id(struct snd_card *card)
 int snd_card_register(struct snd_card *card)
 {
 	int err;
-	struct snd_info_entry *entry;
 
 	snd_assert(card != NULL, return -EINVAL);
 	if ((err = snd_device_register_all(card)) < 0)
@@ -429,22 +454,7 @@ int snd_card_register(struct snd_card *card)
 		choose_default_id(card);
 	snd_cards[card->number] = card;
 	write_unlock(&snd_card_rwlock);
-	if ((err = snd_info_card_register(card)) < 0) {
-		snd_printd("unable to create card info\n");
-		goto __skip_info;
-	}
-	if ((entry = snd_info_create_card_entry(card, "id", card->proc_root)) == NULL) {
-		snd_printd("unable to create card entry\n");
-		goto __skip_info;
-	}
-	entry->c.text.read_size = PAGE_SIZE;
-	entry->c.text.read = snd_card_id_read;
-	if (snd_info_register(entry) < 0) {
-		snd_info_free_entry(entry);
-		entry = NULL;
-	}
-	card->proc_id = entry;
-      __skip_info:
+	init_info_for_card(card);
 #if defined(CONFIG_SND_MIXER_OSS) || defined(CONFIG_SND_MIXER_OSS_MODULE)
 	if (snd_mixer_oss_notify_callback)
 		snd_mixer_oss_notify_callback(card, SND_MIXER_OSS_NOTIFY_REGISTER);
@@ -452,6 +462,7 @@ int snd_card_register(struct snd_card *card)
 	return 0;
 }
 
+#ifdef CONFIG_PROC_FS
 static struct snd_info_entry *snd_card_info_entry = NULL;
 
 static void snd_card_info_read(struct snd_info_entry *entry,
@@ -478,7 +489,7 @@ static void snd_card_info_read(struct snd_info_entry *entry,
 		snd_iprintf(buffer, "--- no soundcards ---\n");
 }
 
-#if defined(CONFIG_SND_OSSEMUL) && defined(CONFIG_PROC_FS)
+#ifdef CONFIG_SND_OSSEMUL
 
 void snd_card_info_read_oss(struct snd_info_buffer *buffer)
 {
@@ -550,15 +561,15 @@ int __init snd_card_info_init(void)
 
 int __exit snd_card_info_done(void)
 {
-	if (snd_card_info_entry)
-		snd_info_unregister(snd_card_info_entry);
+	snd_info_unregister(snd_card_info_entry);
 #ifdef MODULE
-	if (snd_card_module_info_entry)
-		snd_info_unregister(snd_card_module_info_entry);
+	snd_info_unregister(snd_card_module_info_entry);
 #endif
 	return 0;
 }
 
+#endif /* CONFIG_PROC_FS */
+
 /**
  *  snd_component_add - add a component string
  *  @card: soundcard structure

sound/core/pcm.c

@@ -151,30 +151,6 @@ static int snd_pcm_control_ioctl(struct snd_card *card,
 #define FORMAT(v) [SNDRV_PCM_FORMAT_##v] = #v
 #define SUBFORMAT(v) [SNDRV_PCM_SUBFORMAT_##v] = #v 
 
-static char *snd_pcm_stream_names[] = {
-	STREAM(PLAYBACK),
-	STREAM(CAPTURE),
-};
-
-static char *snd_pcm_state_names[] = {
-	STATE(OPEN),
-	STATE(SETUP),
-	STATE(PREPARED),
-	STATE(RUNNING),
-	STATE(XRUN),
-	STATE(DRAINING),
-	STATE(PAUSED),
-	STATE(SUSPENDED),
-};
-
-static char *snd_pcm_access_names[] = {
-	ACCESS(MMAP_INTERLEAVED), 
-	ACCESS(MMAP_NONINTERLEAVED),
-	ACCESS(MMAP_COMPLEX),
-	ACCESS(RW_INTERLEAVED),
-	ACCESS(RW_NONINTERLEAVED),
-};
-
 static char *snd_pcm_format_names[] = {
 	FORMAT(S8),
 	FORMAT(U8),
@@ -216,6 +192,36 @@ static char *snd_pcm_format_names[] = {
 	FORMAT(U18_3BE),
 };
 
+const char *snd_pcm_format_name(snd_pcm_format_t format)
+{
+	return snd_pcm_format_names[format];
+}
+
+#ifdef CONFIG_PROC_FS
+static char *snd_pcm_stream_names[] = {
+	STREAM(PLAYBACK),
+	STREAM(CAPTURE),
+};
+
+static char *snd_pcm_state_names[] = {
+	STATE(OPEN),
+	STATE(SETUP),
+	STATE(PREPARED),
+	STATE(RUNNING),
+	STATE(XRUN),
+	STATE(DRAINING),
+	STATE(PAUSED),
+	STATE(SUSPENDED),
+};
+
+static char *snd_pcm_access_names[] = {
+	ACCESS(MMAP_INTERLEAVED), 
+	ACCESS(MMAP_NONINTERLEAVED),
+	ACCESS(MMAP_COMPLEX),
+	ACCESS(RW_INTERLEAVED),
+	ACCESS(RW_NONINTERLEAVED),
+};
+
 static char *snd_pcm_subformat_names[] = {
 	SUBFORMAT(STD), 
 };
@@ -236,11 +242,6 @@ static const char *snd_pcm_access_name(snd_pcm_access_t access)
 	return snd_pcm_access_names[access];
 }
 
-const char *snd_pcm_format_name(snd_pcm_format_t format)
-{
-	return snd_pcm_format_names[format];
-}
-
 static const char *snd_pcm_subformat_name(snd_pcm_subformat_t subformat)
 {
 	return snd_pcm_subformat_names[subformat];
@@ -288,7 +289,6 @@ static const char *snd_pcm_oss_format_name(int format)
 }
 #endif
 
-#ifdef CONFIG_PROC_FS
 static void snd_pcm_proc_info_read(struct snd_pcm_substream *substream,
 				   struct snd_info_buffer *buffer)
 {
@@ -431,7 +431,6 @@ static void snd_pcm_substream_proc_status_read(struct snd_info_entry *entry,
 	snd_iprintf(buffer, "hw_ptr      : %ld\n", runtime->status->hw_ptr);
 	snd_iprintf(buffer, "appl_ptr    : %ld\n", runtime->control->appl_ptr);
 }
-#endif
 
 #ifdef CONFIG_SND_DEBUG
 static void snd_pcm_xrun_debug_read(struct snd_info_entry *entry,
@@ -596,6 +595,12 @@ static int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream)
 	}
 	return 0;
 }
+#else /* !CONFIG_PROC_FS */
+static inline int snd_pcm_stream_proc_init(struct snd_pcm_str *pstr) { return 0; }
+static inline int snd_pcm_stream_proc_done(struct snd_pcm_str *pstr) { return 0; }
+static inline int snd_pcm_substream_proc_init(struct snd_pcm_substream *substream) { return 0; }
+static inline int snd_pcm_substream_proc_done(struct snd_pcm_substream *substream) { return 0; }
+#endif /* CONFIG_PROC_FS */
 
 /**
  * snd_pcm_new_stream - create a new PCM stream
@@ -1013,6 +1018,7 @@ int snd_pcm_notify(struct snd_pcm_notify *notify, int nfree)
 	return 0;
 }
 
+#ifdef CONFIG_PROC_FS
 /*
  *  Info interface
  */
@@ -1039,18 +1045,12 @@ static void snd_pcm_proc_read(struct snd_info_entry *entry,
 	up(&register_mutex);
 }
 
-/*
- *  ENTRY functions
- */
-
 static struct snd_info_entry *snd_pcm_proc_entry = NULL;
 
-static int __init alsa_pcm_init(void)
+static void snd_pcm_proc_init(void)
 {
 	struct snd_info_entry *entry;
 
-	snd_ctl_register_ioctl(snd_pcm_control_ioctl);
-	snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl);
 	if ((entry = snd_info_create_module_entry(THIS_MODULE, "pcm", NULL)) != NULL) {
 		snd_info_set_text_ops(entry, NULL, SNDRV_CARDS * SNDRV_PCM_DEVICES * 128,
 				      snd_pcm_proc_read);
@@ -1060,6 +1060,29 @@ static int __init alsa_pcm_init(void)
 		}
 	}
 	snd_pcm_proc_entry = entry;
+}
+
+static void snd_pcm_proc_done(void)
+{
+	if (snd_pcm_proc_entry)
+		snd_info_unregister(snd_pcm_proc_entry);
+}
+
+#else /* !CONFIG_PROC_FS */
+#define snd_pcm_proc_init()
+#define snd_pcm_proc_done()
+#endif /* CONFIG_PROC_FS */
+
+
+/*
+ *  ENTRY functions
+ */
+
+static int __init alsa_pcm_init(void)
+{
+	snd_ctl_register_ioctl(snd_pcm_control_ioctl);
+	snd_ctl_register_ioctl_compat(snd_pcm_control_ioctl);
+	snd_pcm_proc_init();
 	return 0;
 }
 
@@ -1067,10 +1090,7 @@ static void __exit alsa_pcm_exit(void)
 {
 	snd_ctl_unregister_ioctl(snd_pcm_control_ioctl);
 	snd_ctl_unregister_ioctl_compat(snd_pcm_control_ioctl);
-	if (snd_pcm_proc_entry) {
-		snd_info_unregister(snd_pcm_proc_entry);
-		snd_pcm_proc_entry = NULL;
-	}
+	snd_pcm_proc_done();
 }
 
 module_init(alsa_pcm_init)

sound/core/pcm_memory.c

@@ -100,10 +100,8 @@ static void snd_pcm_lib_preallocate_dma_free(struct snd_pcm_substream *substream
 int snd_pcm_lib_preallocate_free(struct snd_pcm_substream *substream)
 {
 	snd_pcm_lib_preallocate_dma_free(substream);
-	if (substream->proc_prealloc_entry) {
-		snd_info_unregister(substream->proc_prealloc_entry);
-		substream->proc_prealloc_entry = NULL;
-	}
+	snd_info_unregister(substream->proc_prealloc_entry);
+	substream->proc_prealloc_entry = NULL;
 	return 0;
 }
 
@@ -126,6 +124,7 @@ int snd_pcm_lib_preallocate_free_for_all(struct snd_pcm *pcm)
 	return 0;
 }
 
+#ifdef CONFIG_PROC_FS
 /*
  * read callback for prealloc proc file
  *
@@ -185,20 +184,10 @@ static void snd_pcm_lib_preallocate_proc_write(struct snd_info_entry *entry,
 	}
 }
 
-/*
- * pre-allocate the buffer and create a proc file for the substream
- */
-static int snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream,
-					  size_t size, size_t max)
+static inline void preallocate_info_init(struct snd_pcm_substream *substream)
 {
 	struct snd_info_entry *entry;
 
-	if (size > 0 && preallocate_dma && substream->number < maximum_substreams)
-		preallocate_pcm_pages(substream, size);
-
-	if (substream->dma_buffer.bytes > 0)
-		substream->buffer_bytes_max = substream->dma_buffer.bytes;
-	substream->dma_max = max;
 	if ((entry = snd_info_create_card_entry(substream->pcm->card, "prealloc", substream->proc_root)) != NULL) {
 		entry->c.text.read_size = 64;
 		entry->c.text.read = snd_pcm_lib_preallocate_proc_read;
@@ -212,6 +201,26 @@ static int snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream,
 		}
 	}
 	substream->proc_prealloc_entry = entry;
+}
+
+#else /* !CONFIG_PROC_FS */
+#define preallocate_info_init(s)
+#endif
+
+/*
+ * pre-allocate the buffer and create a proc file for the substream
+ */
+static int snd_pcm_lib_preallocate_pages1(struct snd_pcm_substream *substream,
+					  size_t size, size_t max)
+{
+
+	if (size > 0 && preallocate_dma && substream->number < maximum_substreams)
+		preallocate_pcm_pages(substream, size);
+
+	if (substream->dma_buffer.bytes > 0)
+		substream->buffer_bytes_max = substream->dma_buffer.bytes;
+	substream->dma_max = max;
+	preallocate_info_init(substream);
 	return 0;
 }
 

sound/core/sound.c

@@ -320,6 +320,7 @@ int snd_unregister_device(int type, struct snd_card *card, int dev)
 	return 0;
 }
 
+#ifdef CONFIG_PROC_FS
 /*
  *  INFO PART
  */
@@ -396,6 +397,7 @@ int __exit snd_minor_info_done(void)
 		snd_info_unregister(snd_minor_info_entry);
 	return 0;
 }
+#endif /* CONFIG_PROC_FS */
 
 /*
  *  INIT PART

sound/core/sound_oss.c

@@ -244,11 +244,9 @@ static void snd_minor_info_oss_read(struct snd_info_entry *entry,
 	up(&sound_oss_mutex);
 }
 
-#endif /* CONFIG_PROC_FS */
 
 int __init snd_minor_info_oss_init(void)
 {
-#ifdef CONFIG_PROC_FS
 	struct snd_info_entry *entry;
 
 	entry = snd_info_create_module_entry(THIS_MODULE, "devices", snd_oss_root);
@@ -261,17 +259,15 @@ int __init snd_minor_info_oss_init(void)
 		}
 	}
 	snd_minor_info_oss_entry = entry;
-#endif
 	return 0;
 }
 
 int __exit snd_minor_info_oss_done(void)
 {
-#ifdef CONFIG_PROC_FS
 	if (snd_minor_info_oss_entry)
 		snd_info_unregister(snd_minor_info_oss_entry);
-#endif
 	return 0;
 }
+#endif /* CONFIG_PROC_FS */
 
 #endif /* CONFIG_SND_OSSEMUL */

sound/core/timer.c

@@ -1052,6 +1052,7 @@ static int snd_timer_register_system(void)
 	return snd_timer_global_register(timer);
 }
 
+#ifdef CONFIG_PROC_FS
 /*
  *  Info interface
  */
@@ -1107,6 +1108,33 @@ static void snd_timer_proc_read(struct snd_info_entry *entry,
 	up(&register_mutex);
 }
 
+static struct snd_info_entry *snd_timer_proc_entry = NULL;
+
+static void __init snd_timer_proc_init(void)
+{
+	struct snd_info_entry *entry;
+
+	entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL);
+	if (entry != NULL) {
+		entry->c.text.read_size = SNDRV_TIMER_DEVICES * 128;
+		entry->c.text.read = snd_timer_proc_read;
+		if (snd_info_register(entry) < 0) {
+			snd_info_free_entry(entry);
+			entry = NULL;
+		}
+	}
+	snd_timer_proc_entry = entry;
+}
+
+static void __exit snd_timer_proc_done(void)
+{
+	snd_info_unregister(snd_timer_proc_entry);
+}
+#else /* !CONFIG_PROC_FS */
+#define snd_timer_proc_init()
+#define snd_timer_proc_done()
+#endif
+
 /*
  *  USER SPACE interface
  */
@@ -1928,27 +1956,15 @@ static struct file_operations snd_timer_f_ops =
  *  ENTRY functions
  */
 
-static struct snd_info_entry *snd_timer_proc_entry = NULL;
-
 static int __init alsa_timer_init(void)
 {
 	int err;
-	struct snd_info_entry *entry;
 
 #ifdef SNDRV_OSS_INFO_DEV_TIMERS
 	snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1,
 			      "system timer");
 #endif
-	entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL);
-	if (entry != NULL) {
-		entry->c.text.read_size = SNDRV_TIMER_DEVICES * 128;
-		entry->c.text.read = snd_timer_proc_read;
-		if (snd_info_register(entry) < 0) {
-			snd_info_free_entry(entry);
-			entry = NULL;
-		}
-	}
-	snd_timer_proc_entry = entry;
+
 	if ((err = snd_timer_register_system()) < 0)
 		snd_printk(KERN_ERR "unable to register system timer (%i)\n",
 			   err);
@@ -1956,6 +1972,7 @@ static int __init alsa_timer_init(void)
 				       &snd_timer_f_ops, NULL, "timer")) < 0)
 		snd_printk(KERN_ERR "unable to register timer device (%i)\n",
 			   err);
+	snd_timer_proc_init();
 	return 0;
 }
 
@@ -1969,10 +1986,7 @@ static void __exit alsa_timer_exit(void)
 		struct snd_timer *timer = list_entry(p, struct snd_timer, device_list);
 		snd_timer_unregister(timer);
 	}
-	if (snd_timer_proc_entry) {
-		snd_info_unregister(snd_timer_proc_entry);
-		snd_timer_proc_entry = NULL;
-	}
+	snd_timer_proc_done();
 #ifdef SNDRV_OSS_INFO_DEV_TIMERS
 	snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1);
 #endif