D24032.diff
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	Index: sys/vm/vm_page.h
	===================================================================
	--- sys/vm/vm_page.h
	+++ sys/vm/vm_page.h
	@@ -731,24 +731,12 @@
	#define vm_page_busied(m) \
	((m)->busy_lock != VPB_UNBUSIED)

	-#define vm_page_sbusy(m) do { \
	- if (!vm_page_trysbusy(m)) \
	- panic("%s: page %p failed shared busying", __func__, \
	- (m)); \
	-} while (0)
	-
	#define vm_page_xbusied(m) \
	(((m)->busy_lock & VPB_SINGLE_EXCLUSIVE) != 0)

	#define vm_page_busy_freed(m) \
	((m)->busy_lock == VPB_FREED)

	-#define vm_page_xbusy(m) do { \
	- if (!vm_page_tryxbusy(m)) \
	- panic("%s: page %p failed exclusive busying", __func__, \
	- (m)); \
	-} while (0)
	-
	/* Note: page m's lock must not be owned by the caller. */
	#define vm_page_xunbusy(m) do { \
	if (!atomic_cmpset_rel_int(&(m)->busy_lock, \