From: Steve Capper <steve.capper@xxxxxxx>
Different architectures have slightly different pre-requisites for supporting
Transparent Huge Pages. To simplify the layout of mm/Kconfig, a new option
HAVE_ARCH_TRANSPARENT_HUGEPAGE is introduced and set in each architecture's
Kconfig file (at the moment x86, with ARM being set in a future patch).
Signed-off-by: Steve Capper <steve.capper@xxxxxxx>
Signed-off-by: Will Deacon <will.deacon@xxxxxxx>
---
arch/x86/Kconfig | 4 ++++
mm/Kconfig | 2 +-
2 files changed, 5 insertions(+), 1 deletions(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8ec3a1a..7decdcf 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1297,6 +1297,10 @@ config ILLEGAL_POINTER_VALUE
default 0 if X86_32
default 0xdead000000000000 if X86_64
+config HAVE_ARCH_TRANSPARENT_HUGEPAGE
+ def_bool y
+ depends on MMU
+
source "mm/Kconfig"
config HIGHPTE
diff --git a/mm/Kconfig b/mm/Kconfig
index d5c8019..3322342 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -318,7 +318,7 @@ config NOMMU_INITIAL_TRIM_EXCESS
config TRANSPARENT_HUGEPAGE
bool "Transparent Hugepage Support"
- depends on X86 && MMU
+ depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE
select COMPACTION
help
Transparent Hugepages allows the kernel to use huge pages and
--
1.7.4.1
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