From 25828588412c1f951d72e1eda9e4320d422b7be5 Mon Sep 17 00:00:00 2001
From: Masahiro Yamada <yamada.masahiro@socionext.com>
Date: Tue, 17 May 2016 16:38:06 +0900
Subject: [PATCH] arm64: optimize __asm_{flush, invalidate}_dcache_all
__asm_dcache_all can directly return to the caller of
__asm_{flush,invalidate}_dcache_all.
We do not have to waste x16 register here.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: York Sun <york.sun@nxp.com>
---
arch/arm/cpu/armv8/cache.S | 10 ++--------
1 file changed, 2 insertions(+), 8 deletions(-)
diff --git a/arch/arm/cpu/armv8/cache.S b/arch/arm/cpu/armv8/cache.S
index a9f4fec387..1c71a2f616 100644
--- a/arch/arm/cpu/armv8/cache.S
+++ b/arch/arm/cpu/armv8/cache.S
@@ -104,19 +104,13 @@ finished:
ENDPROC(__asm_dcache_all)
ENTRY(__asm_flush_dcache_all)
- mov x16, lr
mov x0, #0
- bl __asm_dcache_all
- mov lr, x16
- ret
+ b __asm_dcache_all
ENDPROC(__asm_flush_dcache_all)
ENTRY(__asm_invalidate_dcache_all)
- mov x16, lr
mov x0, #0x1
- bl __asm_dcache_all
- mov lr, x16
- ret
+ b __asm_dcache_all
ENDPROC(__asm_invalidate_dcache_all)
/*
--
2.39.5