From 4bd530d026c0dc8af0c20371aac993b881c81fbc Mon Sep 17 00:00:00 2001
From: Gregory Nutt <gnutt@nuttx.org>
Date: Sun, 18 Dec 2016 13:17:31 -0600
Subject: [PATCH] Xtensa ESP32: Last change should be conditioned on the window
 ABI.

---
 arch/xtensa/src/common/xtensa_context.S | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/xtensa/src/common/xtensa_context.S b/arch/xtensa/src/common/xtensa_context.S
index 9084f9bf31..aa0306cb5a 100644
--- a/arch/xtensa/src/common/xtensa_context.S
+++ b/arch/xtensa/src/common/xtensa_context.S
@@ -527,8 +527,9 @@ _xtensa_context_restore:
 	.align	4
 
 xtensa_context_restore:
-	ENTRY(16)								/* REVISIT */
+	ENTRY(16)
 
+#ifndef __XTENSA_CALL0_ABI__
 	/* Force a spill of the live registers of the thread that has been
 	 * suspended.
 	 *
@@ -557,6 +558,7 @@ xtensa_context_restore:
 	rsync
 
 	mov		a2, a4							/* Recover a2 */
+#endif
 
 	/* Restore the processor state for the newly started thread */