D48207.diff
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	diff --git a/sys/dev/sound/pcm/channel.h b/sys/dev/sound/pcm/channel.h
	--- a/sys/dev/sound/pcm/channel.h
	+++ b/sys/dev/sound/pcm/channel.h
	@@ -175,6 +175,7 @@
	#define CHN_LINK(y) y.link
	#define CHN_EMPTY(x, y) SLIST_EMPTY(CHN_HEAD(x, y))
	#define CHN_FIRST(x, y) SLIST_FIRST(CHN_HEAD(x, y))
	+#define CHN_NEXT(elm, list) SLIST_NEXT((elm), CHN_LINK(list))

	#define CHN_FOREACH(x, y, z) \
	SLIST_FOREACH(x, CHN_HEAD(y, z), CHN_LINK(z))
	@@ -188,8 +189,8 @@
	#define CHN_INSERT_AFTER(x, y, z) \
	SLIST_INSERT_AFTER(x, y, CHN_LINK(z))

	-#define CHN_REMOVE(x, y, z) \
	- SLIST_REMOVE(CHN_HEAD(x, z), y, pcm_channel, CHN_LINK(z))
	+#define CHN_REMOVE(holder, elm, list) \
	+ SLIST_REMOVE(CHN_HEAD(holder, list), elm, pcm_channel, CHN_LINK(list))

	#define CHN_INSERT_HEAD_SAFE(x, y, z) do { \
	struct pcm_channel *t = NULL; \
	@@ -211,14 +212,18 @@
	CHN_INSERT_AFTER(x, y, z); \
	} while (0)

	-#define CHN_REMOVE_SAFE(x, y, z) do { \
	- struct pcm_channel *t = NULL; \
	- CHN_FOREACH(t, x, z) { \
	- if (t == y) \
	- break; \
	- } \
	- if (t == y) \
	- CHN_REMOVE(x, y, z); \
	+#define CHN_REMOVE_SAFE(holder, elm, list) do { \
	+ if (CHN_FIRST(holder, list) == (elm)) { \
	+ SLIST_REMOVE_HEAD(CHN_HEAD(holder, list), CHN_LINK(list)); \
	+ } else { \
	+ struct pcm_channel *t = NULL; \
	+ CHN_FOREACH(t, holder, list) { \
	+ if (CHN_NEXT(t, list) == (elm)) { \
	+ SLIST_REMOVE_AFTER(t, CHN_LINK(list)); \
	+ break; \
	+ } \
	+ } \
	+ } \
	} while (0)

	#define CHN_INSERT_SORT(w, x, y, z) do { \