Index: kernel/arch/sparc64/src/proc/sun4v/scheduler.c
===================================================================
--- kernel/arch/sparc64/src/proc/sun4v/scheduler.c	(revision 6eef3c4403b57fc01e6b79237e6cc0a6a6a7d016)
+++ kernel/arch/sparc64/src/proc/sun4v/scheduler.c	(revision 05bab88f6a2578787b9598ccdf1e856cfdbd2828)
@@ -55,6 +55,7 @@
 {
 	if (THREAD->uspace) {
-		uint64_t sp = (uintptr_t) THREAD->kstack + STACK_SIZE -
-		    (STACK_BIAS + ALIGN_UP(STACK_ITEM_SIZE, STACK_ALIGNMENT));
+		uint64_t sp;
+
+		sp = (uintptr_t) THREAD->kstack + STACK_SIZE - STACK_BIAS;
 		asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_KSTACK, sp);
 		asi_u64_write(ASI_SCRATCHPAD, SCRATCHPAD_WBUF,