From d4e50cfe9c75f4d3caab62c7227152db10d23c82 Mon Sep 17 00:00:00 2001
From: Heiko Carstens <hca@linux.ibm.com>
Date: Thu, 7 Nov 2024 16:11:36 +0100
Subject: [PATCH] s390/topology: Convert to use flag output macros

Use flag output macros in inline asm to allow for better code generation if
the compiler has support for the flag output constraint.

Reviewed-by: Juergen Christ <jchrist@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/kernel/topology.c | 15 ++++++++-------
 1 file changed, 8 insertions(+), 7 deletions(-)

diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index a33d6a105086d..4f9c301a705b6 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -26,6 +26,7 @@
 #include <linux/node.h>
 #include <asm/hiperdispatch.h>
 #include <asm/sysinfo.h>
+#include <asm/asm.h>
 
 #define PTF_HORIZONTAL	(0UL)
 #define PTF_VERTICAL	(1UL)
@@ -224,15 +225,15 @@ static void topology_update_polarization_simple(void)
 
 static int ptf(unsigned long fc)
 {
-	int rc;
+	int cc;
 
 	asm volatile(
-		"	.insn	rre,0xb9a20000,%1,%1\n"
-		"	ipm	%0\n"
-		"	srl	%0,28\n"
-		: "=d" (rc)
-		: "d" (fc)  : "cc");
-	return rc;
+		"	.insn	rre,0xb9a20000,%[fc],%[fc]\n"
+		CC_IPM(cc)
+		: CC_OUT(cc, cc)
+		: [fc] "d" (fc)
+		: CC_CLOBBER);
+	return CC_TRANSFORM(cc);
 }
 
 int topology_set_cpu_management(int fc)
-- 
2.51.0