From: wangkefeng.wang@huawei.com (Kefeng Wang)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] arm64: Add support ARCH_SUPPORTS_INT128
Date: Tue, 21 Jun 2016 14:55:23 +0800 [thread overview]
Message-ID: <1466492123-3356-1-git-send-email-wangkefeng.wang@huawei.com> (raw)
The gcc support __SIZEOF_INT128__ and __int128 in arm64, thus,
enable ARCH_SUPPORTS_INT128 to make mul_u64_u32_shr() a bit
more efficient in scheduler.
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
---
arch/arm64/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 5a0a691..ab319eb 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -11,6 +11,7 @@ config ARM64
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_USE_CMPXCHG_LOCKREF
select ARCH_SUPPORTS_ATOMIC_RMW
+ select ARCH_SUPPORTS_INT128
select ARCH_SUPPORTS_NUMA_BALANCING
select ARCH_WANT_OPTIONAL_GPIOLIB
select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
--
1.7.12.4
next reply other threads:[~2016-06-21 6:55 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-21 6:55 Kefeng Wang [this message]
2016-06-21 15:14 ` [PATCH] arm64: Add support ARCH_SUPPORTS_INT128 Catalin Marinas
2016-06-22 10:57 ` Catalin Marinas
2016-06-22 12:43 ` Will Deacon
2016-06-22 13:43 ` Catalin Marinas
2016-06-22 13:23 ` Ard Biesheuvel
2016-06-23 3:23 ` Kefeng Wang
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