diff --git a/include/sound/pcm_oss.h b/include/sound/pcm_oss.h
index fddaddd..d6ec886 100644
--- a/include/sound/pcm_oss.h
+++ b/include/sound/pcm_oss.h
@@ -56,8 +56,10 @@
 	size_t mmap_bytes;
 	char *buffer;				/* vmallocated period */
 	size_t buffer_used;			/* used length from period buffer */
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	struct snd_pcm_plugin *plugin_first;
 	struct snd_pcm_plugin *plugin_last;
+#endif
 	unsigned int prev_hw_ptr_interrupt;
 };
 
diff --git a/sound/core/Kconfig b/sound/core/Kconfig
index f79755f..9dd121b 100644
--- a/sound/core/Kconfig
+++ b/sound/core/Kconfig
@@ -73,6 +73,15 @@
 	  To compile this driver as a module, choose M here: the module
 	  will be called snd-pcm-oss.
 
+config SND_PCM_OSS_PLUGINS
+	bool "OSS PCM (digital audio) API - Include plugin system"
+	depends on SND_PCM_OSS
+        default y
+	help
+          If you disable this option, the ALSA's OSS PCM API will not
+          support conversion of channels, formats and rates. It will
+          behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
+
 config SND_SEQUENCER_OSS
 	bool "OSS Sequencer API"
 	depends on SND && SND_SEQUENCER
@@ -130,6 +139,15 @@
 	  Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 	  or older).
 
+config SND_VERBOSE_PROCFS
+	bool "Verbose procfs contents"
+	depends on SND
+	default y
+	help
+	  Say Y here to include code for verbose procfs contents (provides
+          usefull information to developers when a problem occurs). On the
+          other side, it makes the ALSA subsystem larger.
+
 config SND_VERBOSE_PRINTK
 	bool "Verbose printk"
 	depends on SND
diff --git a/sound/core/oss/copy.c b/sound/core/oss/copy.c
index d6a04c2..7c008c4 100644
--- a/sound/core/oss/copy.c
+++ b/sound/core/oss/copy.c
@@ -20,6 +20,9 @@
  */
 
 #include <sound/driver.h>
+
+#ifdef SND_PCM_OSS_PLUGINS
+
 #include <linux/time.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -85,3 +88,5 @@
 	*r_plugin = plugin;
 	return 0;
 }
+
+#endif
diff --git a/sound/core/oss/io.c b/sound/core/oss/io.c
index 322702e..b6e7ce30 100644
--- a/sound/core/oss/io.c
+++ b/sound/core/oss/io.c
@@ -20,6 +20,9 @@
  */
   
 #include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
 #include <linux/time.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -132,3 +135,5 @@
 	*r_plugin = plugin;
 	return 0;
 }
+
+#endif
diff --git a/sound/core/oss/linear.c b/sound/core/oss/linear.c
index 8cbfa41..ef33123 100644
--- a/sound/core/oss/linear.c
+++ b/sound/core/oss/linear.c
@@ -21,6 +21,9 @@
  */
 
 #include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
 #include <linux/time.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -156,3 +159,5 @@
 	*r_plugin = plugin;
 	return 0;
 }
+
+#endif
diff --git a/sound/core/oss/mulaw.c b/sound/core/oss/mulaw.c
index 14f5578..ed12c81 100644
--- a/sound/core/oss/mulaw.c
+++ b/sound/core/oss/mulaw.c
@@ -22,6 +22,9 @@
  */
   
 #include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
 #include <linux/time.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -306,3 +309,5 @@
 	*r_plugin = plugin;
 	return 0;
 }
+
+#endif
diff --git a/sound/core/oss/pcm_oss.c b/sound/core/oss/pcm_oss.c
index 7fd0723..bc24d02 100644
--- a/sound/core/oss/pcm_oss.c
+++ b/sound/core/oss/pcm_oss.c
@@ -78,6 +78,7 @@
 	set_fs(fs);
 }
 
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
@@ -122,6 +123,7 @@
 	}
 	return 0;
 }
+#endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 
 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 {
@@ -412,6 +414,7 @@
 	oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 			 params_channels(params) / 8;
 
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	snd_pcm_oss_plugin_clear(substream);
 	if (!direct) {
 		/* add necessary plugins */
@@ -441,6 +444,7 @@
 			}
 		}
 	}
+#endif
 
 	err = snd_pcm_oss_period_size(substream, params, sparams);
 	if (err < 0)
@@ -498,11 +502,13 @@
 	runtime->oss.periods = params_periods(sparams);
 	oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
 	snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	if (runtime->oss.plugin_first) {
 		err = snd_pcm_plug_alloc(substream, oss_period_size);
 		if (err < 0)
 			goto failure;
 	}
+#endif
 	oss_period_size *= oss_frame_size;
 
 	oss_buffer_size = oss_period_size * runtime->oss.periods;
@@ -784,6 +790,7 @@
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	snd_pcm_sframes_t frames, frames1;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	if (runtime->oss.plugin_first) {
 		struct snd_pcm_plugin_channel *channels;
 		size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
@@ -800,7 +807,9 @@
 		if (frames1 <= 0)
 			return frames1;
 		bytes = frames1 * oss_frame_bytes;
-	} else {
+	} else
+#endif
+	{
 		frames = bytes_to_frames(runtime, bytes);
 		frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
 		if (frames1 <= 0)
@@ -871,6 +880,7 @@
 {
 	struct snd_pcm_runtime *runtime = substream->runtime;
 	snd_pcm_sframes_t frames, frames1;
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	char __user *final_dst = (char __user *)buf;
 	if (runtime->oss.plugin_first) {
 		struct snd_pcm_plugin_channel *channels;
@@ -887,7 +897,9 @@
 		bytes = frames1 * oss_frame_bytes;
 		if (!in_kernel && copy_to_user(final_dst, buf, bytes))
 			return -EFAULT;
-	} else {
+	} else
+#endif
+	{
 		frames = bytes_to_frames(runtime, bytes);
 		frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
 		if (frames1 <= 0)
@@ -1692,7 +1704,9 @@
 	struct snd_pcm_runtime *runtime;
 	runtime = substream->runtime;
 	vfree(runtime->oss.buffer);
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	snd_pcm_oss_plugin_clear(substream);
+#endif
 	substream->oss.file = NULL;
 	substream->oss.oss = 0;
 }
@@ -2246,8 +2260,10 @@
 		if ((err = snd_pcm_oss_change_params(substream)) < 0)
 			return err;
 	}
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
 	if (runtime->oss.plugin_first != NULL)
 		return -EIO;
+#endif
 
 	if (area->vm_pgoff != 0)
 		return -EINVAL;
diff --git a/sound/core/oss/pcm_plugin.c b/sound/core/oss/pcm_plugin.c
index 7e867688..89bc8f9 100644
--- a/sound/core/oss/pcm_plugin.c
+++ b/sound/core/oss/pcm_plugin.c
@@ -25,6 +25,9 @@
 #endif
 
 #include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
 #include <linux/slab.h>
 #include <linux/time.h>
 #include <linux/vmalloc.h>
@@ -916,3 +919,5 @@
 	}
 	return 0;
 }
+
+#endif
diff --git a/sound/core/oss/pcm_plugin.h b/sound/core/oss/pcm_plugin.h
index 29198da..a8a4f95 100644
--- a/sound/core/oss/pcm_plugin.h
+++ b/sound/core/oss/pcm_plugin.h
@@ -22,6 +22,8 @@
  *
  */
 
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
 #include <linux/bitmap.h>
 
 static inline unsigned long *bitmap_alloc(unsigned int nbits)
@@ -191,6 +193,14 @@
 		  const struct snd_pcm_plugin_channel *dst_channel,
 		  size_t samples);
 
+#else
+
+static inline snd_pcm_sframes_t snd_pcm_plug_client_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t drv_size) { return drv_size; }
+static inline snd_pcm_sframes_t snd_pcm_plug_slave_size(struct snd_pcm_substream *handle, snd_pcm_uframes_t clt_size) { return clt_size; }
+static inline int snd_pcm_plug_slave_format(int format, struct snd_mask *format_mask) { return format; }
+
+#endif
+
 #ifdef PLUGIN_DEBUG
 #define pdprintf( fmt, args... ) printk( "plugin: " fmt, ##args)
 #else
diff --git a/sound/core/oss/rate.c b/sound/core/oss/rate.c
index 4854cef..c4b75bf 100644
--- a/sound/core/oss/rate.c
+++ b/sound/core/oss/rate.c
@@ -20,6 +20,9 @@
  */
   
 #include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
 #include <linux/time.h>
 #include <sound/core.h>
 #include <sound/pcm.h>
@@ -377,3 +380,5 @@
 	*r_plugin = plugin;
 	return 0;
 }
+
+#endif
diff --git a/sound/core/oss/route.c b/sound/core/oss/route.c
index 726c5ca..f99a54e 100644
--- a/sound/core/oss/route.c
+++ b/sound/core/oss/route.c
@@ -20,6 +20,9 @@
  */
 
 #include <sound/driver.h>
+
+#ifdef CONFIG_SND_PCM_OSS_PLUGINS
+
 #include <linux/slab.h>
 #include <linux/time.h>
 #include <sound/core.h>
@@ -519,3 +522,5 @@
 	*r_plugin = plugin;
 	return 0;
 }
+
+#endif
diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 28ca61eb..d92c3ce 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -140,6 +140,9 @@
 	}
 	return -ENOIOCTLCMD;
 }
+
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_SND_VERBOSE_PROCFS)
+
 #define STATE(v) [SNDRV_PCM_STATE_##v] = #v
 #define STREAM(v) [SNDRV_PCM_STREAM_##v] = #v
 #define READY(v) [SNDRV_PCM_READY_##v] = #v
@@ -197,7 +200,6 @@
 	return snd_pcm_format_names[format];
 }
 
-#ifdef CONFIG_PROC_FS
 static char *snd_pcm_stream_names[] = {
 	STREAM(PLAYBACK),
 	STREAM(CAPTURE),
diff --git a/sound/usb/usbaudio.c b/sound/usb/usbaudio.c
index f5aadb0..c9476c2 100644
--- a/sound/usb/usbaudio.c
+++ b/sound/usb/usbaudio.c
@@ -1384,8 +1384,8 @@
 	channels = params_channels(hw_params);
 	fmt = find_format(subs, format, rate, channels);
 	if (! fmt) {
-		snd_printd(KERN_DEBUG "cannot set format: format = %s, rate = %d, channels = %d\n",
-			   snd_pcm_format_name(format), rate, channels);
+		snd_printd(KERN_DEBUG "cannot set format: format = 0x%x, rate = %d, channels = %d\n",
+			   format, rate, channels);
 		return -EINVAL;
 	}
 
@@ -2011,6 +2011,8 @@
 };
 
 
+#if defined(CONFIG_PROCFS) && defined(CONFIG_SND_VERBOSE_PROCFS)
+
 /*
  * proc interface for list the supported pcm formats
  */
@@ -2101,6 +2103,13 @@
 		snd_info_set_text_ops(entry, stream, 1024, proc_pcm_format_read);
 }
 
+#else
+
+static inline void proc_pcm_format_add(struct snd_usb_stream *stream)
+{
+}
+
+#endif
 
 /*
  * initialize the substream instance.