Currently ZONE_DEVICE depends on X86_64. This is fine for now, but it
will get unwieldly as new platforms get ZONE_DEVICE support. Moving it
to an arch selected Kconfig option to save us some trouble in the
future.
Cc: x...@kernel.org
Signed-off-by: Oliver O'Halloran <ooh...@gmail.com>
---
arch/x86/Kconfig | 1 +
mm/Kconfig | 5 ++++-
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index cd18994a9555..acbb15234562 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 beb7a455915d..2d38a4abe957 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -683,12 +683,15 @@ config IDLE_PAGE_TRACKING
See Documentation/vm/idle_page_tracking.txt for more details.
+config ARCH_HAS_ZONE_DEVICE
+ def_bool n
+
config ZONE_DEVICE
bool "Device memory (pmem, etc...) hotplug support"
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
