From 4ee471fe5a5a891ac4fcd45b5457fcb17de694de Mon Sep 17 00:00:00 2001
From: Vasily Gorbik <gor@linux.ibm.com>
Date: Wed, 30 Jun 2021 10:21:58 +0200
Subject: [PATCH] s390/linkage: increase asm symbols alignment to 16

Both clang and gcc (for -march=z13 and later) align functions to 16
bytes at -O2 to benefit branch prediction.

Make asm symbols alignment consistent with that.

This also benefits potential ftrace code patching, which is currently
able to patch 8 aligned bytes at once.

With defconfig this currently increases .text size by 4104 bytes.

Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
---
 arch/s390/include/asm/linkage.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/s390/include/asm/linkage.h b/arch/s390/include/asm/linkage.h
index a0a7a2c72bd4f..24e8fed150cf8 100644
--- a/arch/s390/include/asm/linkage.h
+++ b/arch/s390/include/asm/linkage.h
@@ -5,7 +5,7 @@
 #include <asm/asm-const.h>
 #include <linux/stringify.h>
 
-#define __ALIGN .align 4, 0x07
+#define __ALIGN .align 16, 0x07
 #define __ALIGN_STR __stringify(__ALIGN)
 
 /*