linux-kernel - [PATCH 2/2] mips/mm: Enable SOFT

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Message-Id: <20200426174058.1181837-2-jiaxun.yang@flygoat.com>
Date:   Mon, 27 Apr 2020 01:40:56 +0800
From:   Jiaxun Yang <jiaxun.yang@...goat.com>
To:     akpm@...ux-foundation.org
Cc:     sunguoyun@...ngson.cn, Jiaxun Yang <jiaxun.yang@...goat.com>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
        Paul Burton <paulburton@...nel.org>,
        Philippe Mathieu-Daudé <f4bug@...at.org>,
        Dmitry Korotin <dkorotin@...ecomp.com>,
        Daniel Silsby <dansilsby@...il.com>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] mips/mm: Enable SOFT_DIRTY for all 64bit systems

64bit systems always have enough page table bits.
So we can safely enable it for all of them instead of for Loongson
only.

If oneday 32bit systems get 64bit PTEs than we can drop this
limition.

Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
---
 arch/mips/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 85011023839b..743ed9b9099e 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -45,6 +45,7 @@ config MIPS
 	select HAVE_ARCH_MMAP_RND_BITS if MMU
 	select HAVE_ARCH_MMAP_RND_COMPAT_BITS if MMU && COMPAT
 	select HAVE_ARCH_SECCOMP_FILTER
+	select HAVE_ARCH_SOFT_DIRTY if 64BIT
 	select HAVE_ARCH_TRACEHOOK
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE if CPU_SUPPORTS_HUGEPAGES
 	select HAVE_ASM_MODVERSIONS
@@ -495,7 +496,6 @@ config MACH_LOONGSON64
 	select COMMON_CLK
 	select USE_OF
 	select BUILTIN_DTB
-	select HAVE_ARCH_SOFT_DIRTY
 	help
 	  This enables the support of Loongson-2/3 family of machines.
 
-- 
2.26.0.rc2