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authorOliver O'Halloran <oohall@gmail.com>2017-06-28 11:32:31 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2017-07-02 20:40:26 +1000
commit65f7d049788763969180c72ef98dab8bf0340c55 (patch)
treef53c38c22b3dff69a7d010e08091f184552d0e19
parent7a849a6cf3ff676d1726259c18fa413f9e0c62a3 (diff)
mm, x86: Add ARCH_HAS_ZONE_DEVICE to Kconfig
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 Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--mm/Kconfig6
2 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 4ccfacc7232a..32903e30e347 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..790e52a8a486 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -683,12 +683,16 @@ config IDLE_PAGE_TRACKING
See Documentation/vm/idle_page_tracking.txt for more details.
+# arch_add_memory() comprehends device memory
+config ARCH_HAS_ZONE_DEVICE
+ bool
+
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,