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From:   Huacai Chen <chenhuacai@loongson.cn>
To:     Arnd Bergmann <arnd@arndb.de>, Huacai Chen <chenhuacai@kernel.org>,
        Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will@kernel.org>
Cc:     loongarch@lists.linux.dev, linux-arch@vger.kernel.org,
        Xuefeng Li <lixuefeng@loongson.cn>,
        Guo Ren <guoren@kernel.org>, Xuerui Wang <kernel@xen0n.name>,
        Jiaxun Yang <jiaxun.yang@flygoat.com>,
        Andrew Morton <akpm@linux-foundation.org>, linux-mm@kvack.org,
        linux-mips@vger.kernel.org, linux-kernel@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org,
        Feiyang Chen <chenfeiyang@loongson.cn>,
        Huacai Chen <chenhuacai@loongson.cn>
Subject: [PATCH V2 4/4] LoongArch: Enable ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
Date:   Thu, 30 Jun 2022 12:32:37 +0800
Message-Id: <20220630043237.2059576-5-chenhuacai@loongson.cn>
In-Reply-To: <20220630043237.2059576-1-chenhuacai@loongson.cn>
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From: Feiyang Chen <chenfeiyang@loongson.cn>

The feature of minimizing overhead of struct page associated with each
HugeTLB page is implemented on x86_64. However, the infrastructure of
this feature is already there, so just select ARCH_WANT_HUGETLB_PAGE_
OPTIMIZE_VMEMMAP is enough to enable this feature for LoongArch.

To avoid build error on LoongArch we should include linux/static_key.h
in page-flags.h.

Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Feiyang Chen <chenfeiyang@loongson.cn>
---
 arch/loongarch/Kconfig     | 1 +
 include/linux/page-flags.h | 1 +
 2 files changed, 2 insertions(+)

diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig
index 55ab84fd70e5..8e56ca28165e 100644
--- a/arch/loongarch/Kconfig
+++ b/arch/loongarch/Kconfig
@@ -49,6 +49,7 @@ config LOONGARCH
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
+	select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP
 	select ARCH_WANTS_NO_INSTR
 	select BUILDTIME_TABLE_SORT
 	select COMMON_CLK
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index e66f7aa3191d..28a53ac7aa3e 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -9,6 +9,7 @@
 #include <linux/types.h>
 #include <linux/bug.h>
 #include <linux/mmdebug.h>
+#include <linux/static_key.h>
 #ifndef __GENERATING_BOUNDS_H
 #include <linux/mm_types.h>
 #include <generated/bounds.h>
-- 
2.27.0