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[1/3] arm64: optimize __asm_{flush, invalidate}_dcache_all

Message ID 1463470688-13772-2-git-send-email-yamada.masahiro@socionext.com
State Accepted
Commit 25828588412c1f951d72e1eda9e4320d422b7be5
Headers show

Commit Message

Masahiro Yamada May 17, 2016, 7:38 a.m. UTC 
__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>

---

 arch/arm/cpu/armv8/cache.S | 10 ++--------
 1 file changed, 2 insertions(+), 8 deletions(-)

-- 
1.9.1

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diff mbox

Patch

diff --git a/arch/arm/cpu/armv8/cache.S b/arch/arm/cpu/armv8/cache.S
index a9f4fec..1c71a2f 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)
 
 /*