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Groups > linux.kernel > #1622669

[PATCH] mm, x86: Add ARCH_HAS_ZONE_DEVICE to Kconfig

From Oliver O'Halloran <oohall@gmail.com>
Newsgroups linux.kernel
Subject [PATCH] mm, x86: Add ARCH_HAS_ZONE_DEVICE to Kconfig
Date 2017-04-13 04:30 +0200
Message-ID <tvCGd-4M2-1@gated-at.bofh.it> (permalink)
Organization linux.* mail to news gateway

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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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[PATCH] mm, x86: Add ARCH_HAS_ZONE_DEVICE to Kconfig Oliver O'Halloran <oohall@gmail.com> - 2017-04-13 04:30 +0200
  [PATCH v2] mm, x86: Add ARCH_HAS_ZONE_DEVICE to Kconfig Oliver O'Halloran <oohall@gmail.com> - 2017-04-13 07:20 +0200

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