Index: kernel/arch/sparc64/src/sun4v/sparc64.c
===================================================================
--- kernel/arch/sparc64/src/sun4v/sparc64.c	(revision c5429fedb8216659204bbbdba42d7f5a845e4dda)
+++ kernel/arch/sparc64/src/sun4v/sparc64.c	(revision 3e828ea40985ce126affd5d7faa6ba679802b4db)
@@ -161,9 +161,9 @@
 {
 	(void) interrupts_disable();
-	switch_to_userspace((uintptr_t) kernel_uarg->uspace_entry,
-	    ((uintptr_t) kernel_uarg->uspace_stack) +
+	switch_to_userspace(kernel_uarg->uspace_entry,
+	    kernel_uarg->uspace_stack +
 	    kernel_uarg->uspace_stack_size -
 	    (ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT) + STACK_BIAS),
-	    (uintptr_t) kernel_uarg->uspace_uarg);
+	    kernel_uarg->uspace_uarg);
 
 	/* Not reached */