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Subject[PATCH] mm, x86: Add ARCH_HAS_ZONE_DEVICE to Kconfig
Date
Currently ZONE_DEVICE depends on X86_64 and this will get unwieldly as
new architectures (and platforms) get ZONE_DEVICE support. Move to an
arch selected Kconfig option to save us the trouble.

Cc: linux-mm@kvack.org
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
---
arch/x86/Kconfig | 1 +
mm/Kconfig | 2 +-
2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c43f47622440..535b4d514792 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -59,6 +59,7 @@ config X86
select ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_HAS_STRICT_MODULE_RWX
select ARCH_HAS_UBSAN_SANITIZE_ALL
+ select ARCH_HAS_ZONE_DEVICE if X86_64
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
select ARCH_MIGHT_HAVE_PC_PARPORT
diff --git a/mm/Kconfig b/mm/Kconfig
index c89f472b658c..57c1cbd9a050 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -689,7 +689,7 @@ config ZONE_DEVICE
depends on MEMORY_HOTPLUG
depends on MEMORY_HOTREMOVE
depends on SPARSEMEM_VMEMMAP
- depends on X86_64 #arch_add_memory() comprehends device memory
+ depends on ARCH_HAS_ZONE_DEVICE

help
Device memory hotplug support allows for establishing pmem,
--
2.9.3
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