sound: make OSS sound core optional

[net-next-2.6.git] / sound / sound_core.c

diff --git a/sound/sound_core.c b/sound/sound_core.c
index 1b04259a4328486357059acfd892bb3015285203..68614c3ed5412f2209c16f94bc74d0785a0baa7c 100644 (file)
--- a/sound/sound_core.c
+++ b/sound/sound_core.c
@@ -1,5 +1,61 @@
 /*
- *     Sound core handling. Breaks out sound functions to submodules
+ *     Sound core.  This file is composed of two parts.  sound_class
+ *     which is common to both OSS and ALSA and OSS sound core which
+ *     is used OSS or emulation of it.
+ */
+
+/*
+ * First, the common part.
+ */
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/err.h>
+
+#ifdef CONFIG_SOUND_OSS_CORE
+static int __init init_oss_soundcore(void);
+static void __exit cleanup_oss_soundcore(void);
+#else
+static inline int init_oss_soundcore(void)     { return 0; }
+static inline void cleanup_oss_soundcore(void) { }
+#endif
+
+struct class *sound_class;
+EXPORT_SYMBOL(sound_class);
+
+MODULE_DESCRIPTION("Core sound module");
+MODULE_AUTHOR("Alan Cox");
+MODULE_LICENSE("GPL");
+
+static int __init init_soundcore(void)
+{
+       int rc;
+
+       rc = init_oss_soundcore();
+       if (rc)
+               return rc;
+
+       sound_class = class_create(THIS_MODULE, "sound");
+       if (IS_ERR(sound_class)) {
+               cleanup_oss_soundcore();
+               return PTR_ERR(sound_class);
+       }
+
+       return 0;
+}
+
+static void __exit cleanup_soundcore(void)
+{
+       cleanup_oss_soundcore();
+       class_destroy(sound_class);
+}
+
+module_init(init_soundcore);
+module_exit(cleanup_soundcore);
+
+
+#ifdef CONFIG_SOUND_OSS_CORE
+/*
+ *     OSS sound core handling. Breaks out sound functions to submodules
  *     
  *     Author:         Alan Cox <alan.cox@linux.org>
  *
@@ -34,21 +90,17 @@
  *     locking at some point in 2.3.x.
  */
 
-#include <linux/module.h>
 #include <linux/init.h>
 #include <linux/slab.h>
 #include <linux/smp_lock.h>
 #include <linux/types.h>
 #include <linux/kernel.h>
-#include <linux/fs.h>
 #include <linux/sound.h>
 #include <linux/major.h>
 #include <linux/kmod.h>
-#include <linux/device.h>
 
 #define SOUND_STEP 16
 
-
 struct sound_unit
 {
        int unit_minor;
@@ -64,9 +116,6 @@ extern int msnd_classic_init(void);
 extern int msnd_pinnacle_init(void);
 #endif
 
-struct class *sound_class;
-EXPORT_SYMBOL(sound_class);
-
 /*
  *     Low level list operator. Scan the ordered list, find a hole and
  *     join into it. Called with the lock asserted
@@ -523,31 +572,23 @@ int soundcore_open(struct inode *inode, struct file *file)
        return -ENODEV;
 }
 
-MODULE_DESCRIPTION("Core sound module");
-MODULE_AUTHOR("Alan Cox");
-MODULE_LICENSE("GPL");
 MODULE_ALIAS_CHARDEV_MAJOR(SOUND_MAJOR);
 
-static void __exit cleanup_soundcore(void)
+static void __exit cleanup_oss_soundcore(void)
 {
        /* We have nothing to really do here - we know the lists must be
           empty */
        unregister_chrdev(SOUND_MAJOR, "sound");
-       class_destroy(sound_class);
 }
 
-static int __init init_soundcore(void)
+static int __init init_oss_soundcore(void)
 {
        if (register_chrdev(SOUND_MAJOR, "sound", &soundcore_fops)==-1) {
                printk(KERN_ERR "soundcore: sound device already in use.\n");
                return -EBUSY;
        }
-       sound_class = class_create(THIS_MODULE, "sound");
-       if (IS_ERR(sound_class))
-               return PTR_ERR(sound_class);
 
        return 0;
 }
 
-module_init(init_soundcore);
-module_exit(cleanup_soundcore);
+#endif /* CONFIG_SOUND_OSS_CORE */