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* [PATCH V2 3/6] mm: Generalize ARCH_ENABLE_MEMORY_[HOTPLUG|HOTREMOVE]
       [not found] <1617259448-22529-1-git-send-email-anshuman.khandual@arm.com>
@ 2021-04-01  6:44 ` Anshuman Khandual
  0 siblings, 0 replies; only message in thread
From: Anshuman Khandual @ 2021-04-01  6:44 UTC (permalink / raw)
  To: linux-mm, akpm
  Cc: linux-kernel, Anshuman Khandual, Catalin Marinas, Will Deacon,
	Michael Ellerman, Benjamin Herrenschmidt, Paul Mackerras,
	Heiko Carstens, Vasily Gorbik, Christian Borntraeger,
	Yoshinori Sato, Rich Felker, Thomas Gleixner, Ingo Molnar, x86,
	H. Peter Anvin, linux-arm-kernel, linux-ia64, linuxppc-dev,
	linux-s390, linux-sh

ARCH_ENABLE_MEMORY_[HOTPLUG|HOTREMOVE] configs have duplicate definitions
on platforms that subscribe them. Instead, just make them generic options
which can be selected on applicable platforms.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Cc: Rich Felker <dalias@libc.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: x86@kernel.org
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-ia64@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Catalin Marinas <catalin.marinas@arm.com> (arm64)
Acked-by: Heiko Carstens <hca@linux.ibm.com> (s390)
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
 arch/arm64/Kconfig   |  8 ++------
 arch/ia64/Kconfig    |  8 ++------
 arch/powerpc/Kconfig |  8 ++------
 arch/s390/Kconfig    |  8 ++------
 arch/sh/Kconfig      |  2 ++
 arch/sh/mm/Kconfig   |  8 --------
 arch/x86/Kconfig     | 10 ++--------
 mm/Kconfig           |  6 ++++++
 8 files changed, 18 insertions(+), 40 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index c86b28ef6ac0..48355c5519c3 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -11,6 +11,8 @@ config ARM64
 	select ACPI_PPTT if ACPI
 	select ARCH_HAS_DEBUG_WX
 	select ARCH_BINFMT_ELF_STATE
+	select ARCH_ENABLE_MEMORY_HOTPLUG
+	select ARCH_ENABLE_MEMORY_HOTREMOVE
 	select ARCH_HAS_CACHE_LINE_SIZE
 	select ARCH_HAS_DEBUG_VIRTUAL
 	select ARCH_HAS_DEBUG_VM_PGTABLE
@@ -305,12 +307,6 @@ config ZONE_DMA32
 	bool "Support DMA32 zone" if EXPERT
 	default y
 
-config ARCH_ENABLE_MEMORY_HOTPLUG
-	def_bool y
-
-config ARCH_ENABLE_MEMORY_HOTREMOVE
-	def_bool y
-
 config SMP
 	def_bool y
 
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 2ad7a8d29fcc..96ce53ad5c9d 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -13,6 +13,8 @@ config IA64
 	select ARCH_MIGHT_HAVE_PC_SERIO
 	select ACPI
 	select ACPI_NUMA if NUMA
+	select ARCH_ENABLE_MEMORY_HOTPLUG
+	select ARCH_ENABLE_MEMORY_HOTREMOVE
 	select ARCH_SUPPORTS_ACPI
 	select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI
 	select ARCH_MIGHT_HAVE_ACPI_PDC if ACPI
@@ -250,12 +252,6 @@ config HOTPLUG_CPU
 	  can be controlled through /sys/devices/system/cpu/cpu#.
 	  Say N if you want to disable CPU hotplug.
 
-config ARCH_ENABLE_MEMORY_HOTPLUG
-	def_bool y
-
-config ARCH_ENABLE_MEMORY_HOTREMOVE
-	def_bool y
-
 config SCHED_SMT
 	bool "SMT scheduler support"
 	depends on SMP
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a74c211e55b1..02a05a24659d 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -118,6 +118,8 @@ config PPC
 	# Please keep this list sorted alphabetically.
 	#
 	select ARCH_32BIT_OFF_T if PPC32
+	select ARCH_ENABLE_MEMORY_HOTPLUG
+	select ARCH_ENABLE_MEMORY_HOTREMOVE
 	select ARCH_HAS_DEBUG_VIRTUAL
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
 	select ARCH_HAS_ELF_RANDOMIZE
@@ -515,12 +517,6 @@ config ARCH_CPU_PROBE_RELEASE
 	def_bool y
 	depends on HOTPLUG_CPU
 
-config ARCH_ENABLE_MEMORY_HOTPLUG
-	def_bool y
-
-config ARCH_ENABLE_MEMORY_HOTREMOVE
-	def_bool y
-
 config PPC64_SUPPORTS_MEMORY_FAILURE
 	bool "Add support for memory hwpoison"
 	depends on PPC_BOOK3S_64
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index c1ff874e6c2e..f8b356550daa 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -60,6 +60,8 @@ config S390
 	imply IMA_SECURE_AND_OR_TRUSTED_BOOT
 	select ARCH_32BIT_USTAT_F_TINODE
 	select ARCH_BINFMT_ELF_STATE
+	select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
+	select ARCH_ENABLE_MEMORY_HOTREMOVE
 	select ARCH_HAS_DEBUG_VM_PGTABLE
 	select ARCH_HAS_DEBUG_WX
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
@@ -626,12 +628,6 @@ config ARCH_SPARSEMEM_ENABLE
 config ARCH_SPARSEMEM_DEFAULT
 	def_bool y
 
-config ARCH_ENABLE_MEMORY_HOTPLUG
-	def_bool y if SPARSEMEM
-
-config ARCH_ENABLE_MEMORY_HOTREMOVE
-	def_bool y
-
 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
 	def_bool y
 
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index a54b0c5de37b..68129537e350 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -2,6 +2,8 @@
 config SUPERH
 	def_bool y
 	select ARCH_32BIT_OFF_T
+	select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM && MMU
+	select ARCH_ENABLE_MEMORY_HOTREMOVE if SPARSEMEM && MMU
 	select ARCH_HAVE_CUSTOM_GPIO_H
 	select ARCH_HAVE_NMI_SAFE_CMPXCHG if (GUSA_RB || CPU_SH4A)
 	select ARCH_HAS_BINFMT_FLAT if !MMU
diff --git a/arch/sh/mm/Kconfig b/arch/sh/mm/Kconfig
index 77aa2f802d8d..d551a9cac41e 100644
--- a/arch/sh/mm/Kconfig
+++ b/arch/sh/mm/Kconfig
@@ -136,14 +136,6 @@ config ARCH_SPARSEMEM_DEFAULT
 config ARCH_SELECT_MEMORY_MODEL
 	def_bool y
 
-config ARCH_ENABLE_MEMORY_HOTPLUG
-	def_bool y
-	depends on SPARSEMEM && MMU
-
-config ARCH_ENABLE_MEMORY_HOTREMOVE
-	def_bool y
-	depends on SPARSEMEM && MMU
-
 config ARCH_MEMORY_PROBE
 	def_bool y
 	depends on MEMORY_HOTPLUG
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 51d171abb57a..503d8b2e8676 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -60,6 +60,8 @@ config X86
 	select ACPI_SYSTEM_POWER_STATES_SUPPORT	if ACPI
 	select ARCH_32BIT_OFF_T			if X86_32
 	select ARCH_CLOCKSOURCE_INIT
+	select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64 || (X86_32 && HIGHMEM)
+	select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG
 	select ARCH_HAS_ACPI_TABLE_UPGRADE	if ACPI
 	select ARCH_HAS_CACHE_LINE_SIZE
 	select ARCH_HAS_DEBUG_VIRTUAL
@@ -2423,14 +2425,6 @@ config ARCH_HAS_ADD_PAGES
 	def_bool y
 	depends on X86_64 && ARCH_ENABLE_MEMORY_HOTPLUG
 
-config ARCH_ENABLE_MEMORY_HOTPLUG
-	def_bool y
-	depends on X86_64 || (X86_32 && HIGHMEM)
-
-config ARCH_ENABLE_MEMORY_HOTREMOVE
-	def_bool y
-	depends on MEMORY_HOTPLUG
-
 config USE_PERCPU_NUMA_NODE_ID
 	def_bool y
 	depends on NUMA
diff --git a/mm/Kconfig b/mm/Kconfig
index 1c9a37fc651a..9b58fa08847d 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -149,6 +149,9 @@ config MEMORY_ISOLATION
 config HAVE_BOOTMEM_INFO_NODE
 	def_bool n
 
+config ARCH_ENABLE_MEMORY_HOTPLUG
+	bool
+
 # eventually, we can have this option just 'select SPARSEMEM'
 config MEMORY_HOTPLUG
 	bool "Allow for memory hot-add"
@@ -177,6 +180,9 @@ config MEMORY_HOTPLUG_DEFAULT_ONLINE
 	  Say N here if you want the default policy to keep all hot-plugged
 	  memory blocks in 'offline' state.
 
+config ARCH_ENABLE_MEMORY_HOTREMOVE
+	bool
+
 config MEMORY_HOTREMOVE
 	bool "Allow for memory hot remove"
 	select HAVE_BOOTMEM_INFO_NODE if (X86_64 || PPC64)
-- 
2.20.1


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2021-04-01  6:44 ` [PATCH V2 3/6] mm: Generalize ARCH_ENABLE_MEMORY_[HOTPLUG|HOTREMOVE] Anshuman Khandual

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