[RFC PATCH 4/4] arm64: mm: Re-enable OPTIMIZE_HUGETLB_VMEMMAP

[Yu Zhao]

From: Nanyong Sun <sunnanyong at huawei.com>

Now update of vmemmap page table can follow the rule of
break-before-make safely for arm64 architecture, re-enable
HVO on arm64.

Signed-off-by: Nanyong Sun <sunnanyong at huawei.com>
Reviewed-by: Muchun Song <songmuchun at bytedance.com>
Signed-off-by: Yu Zhao <yuzhao at google.com>
---
 arch/arm64/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index a2f8ff354ca6..25ff026cdaf5 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -105,6 +105,7 @@ config ARM64
 	select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
 	select ARCH_WANT_FRAME_POINTERS
 	select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36)
+	select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
 	select ARCH_WANT_LD_ORPHAN_WARN
 	select ARCH_WANTS_EXECMEM_LATE if EXECMEM
 	select ARCH_WANTS_NO_INSTR
-- 
2.46.0.rc2.264.g509ed76dc8-goog