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Commit e7d4bac4 authored by Nikunj Kela's avatar Nikunj Kela Committed by Will Deacon
Browse files

arm64: add ARM64-specific support for flatmem 



Flatmem is useful in reducing kernel memory usage.
One usecase is in kdump kernel. We are able to save
~14M by moving to flatmem scheme.

Cc: xe-kernel@external.cisco.com
Cc: Nikunj Kela <nkela@cisco.com>
Signed-off-by: default avatarNikunj Kela <nkela@cisco.com>
Signed-off-by: default avatarWill Deacon <will.deacon@arm.com>
parent d7c7118c

arch/arm64/Kconfig

+3 −0
Original line number Diff line number Diff line
@@ -786,6 +786,9 @@ config ARCH_SPARSEMEM_DEFAULT 
config ARCH_SELECT_MEMORY_MODEL

	def_bool ARCH_SPARSEMEM_ENABLE



config ARCH_FLATMEM_ENABLE

	def_bool y



config HAVE_ARCH_PFN_VALID

	def_bool ARCH_HAS_HOLES_MEMORYMODEL || !SPARSEMEM