[PATCH 5/6] mm: Drop redundant ARCH_ENABLE_SPLIT_PMD_PTLOCK

[Anshuman Khandual]

ARCH_ENABLE_SPLIT_PMD_PTLOCKS has duplicate definitions on platforms that
subscribe it. Drop these reduntant definitions and instead just select it
on applicable platforms.

Cc: Catalin Marinas <catalin.marinas at arm.com>
Cc: Will Deacon <will at kernel.org>
Cc: Michael Ellerman <mpe at ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh at kernel.crashing.org>
Cc: Paul Mackerras <paulus at samba.org>
Cc: Heiko Carstens <hca at linux.ibm.com>
Cc: Vasily Gorbik <gor at linux.ibm.com>
Cc: Christian Borntraeger <borntraeger at de.ibm.com>
Cc: Yoshinori Sato <ysato at users.sourceforge.jp>
Cc: Rich Felker <dalias at libc.org>
Cc: Thomas Gleixner <tglx at linutronix.de>
Cc: Ingo Molnar <mingo at redhat.com>
Cc: x86 at kernel.org
Cc: "H. Peter Anvin" <hpa at zytor.com>
Cc: Andrew Morton <akpm at linux-foundation.org>
Cc: linux-arm-kernel at lists.infradead.org
Cc: linux-ia64 at vger.kernel.org
Cc: linuxppc-dev at lists.ozlabs.org
Cc: linux-s390 at vger.kernel.org
Cc: linux-sh at vger.kernel.org
Cc: linux-mm at kvack.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual at arm.com>
---
 arch/arm64/Kconfig                     | 4 +---
 arch/powerpc/platforms/Kconfig.cputype | 5 +----
 arch/s390/Kconfig                      | 4 +---
 arch/x86/Kconfig                       | 5 +----
 4 files changed, 4 insertions(+), 14 deletions(-)

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index c0e75f62f08c..fb5b1630a4eb 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -14,6 +14,7 @@ config ARM64
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
 	select ARCH_ENABLE_MEMORY_HOTPLUG
 	select ARCH_ENABLE_MEMORY_HOTREMOVE
+	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if PGTABLE_LEVELS > 2
 	select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
 	select ARCH_HAS_CACHE_LINE_SIZE
 	select ARCH_HAS_DEBUG_VIRTUAL
@@ -1054,9 +1055,6 @@ config HW_PERF_EVENTS
 
 config ARCH_WANT_HUGE_PMD_SHARE
 
-config ARCH_ENABLE_SPLIT_PMD_PTLOCK
-	def_bool y if PGTABLE_LEVELS > 2
-
 # Supported by clang >= 7.0
 config CC_HAVE_SHADOW_CALL_STACK
 	def_bool $(cc-option, -fsanitize=shadow-call-stack -ffixed-x18)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 4465b71b2bff..be0e29f18dd4 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -97,6 +97,7 @@ config PPC_BOOK3S_64
 	select PPC_HAVE_PMU_SUPPORT
 	select HAVE_ARCH_TRANSPARENT_HUGEPAGE
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION
+	select ARCH_ENABLE_PMD_SPLIT_PTLOCK
 	select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE
 	select ARCH_SUPPORTS_HUGETLBFS
 	select ARCH_SUPPORTS_NUMA_BALANCING
@@ -356,10 +357,6 @@ config SPE
 
 	  If in doubt, say Y here.
 
-config ARCH_ENABLE_SPLIT_PMD_PTLOCK
-	def_bool y
-	depends on PPC_BOOK3S_64
-
 config PPC_RADIX_MMU
 	bool "Radix MMU Support"
 	depends on PPC_BOOK3S_64
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index f8b356550daa..d72989591223 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -62,6 +62,7 @@ config S390
 	select ARCH_BINFMT_ELF_STATE
 	select ARCH_ENABLE_MEMORY_HOTPLUG if SPARSEMEM
 	select ARCH_ENABLE_MEMORY_HOTREMOVE
+	select ARCH_ENABLE_SPLIT_PMD_PTLOCK
 	select ARCH_HAS_DEBUG_VM_PGTABLE
 	select ARCH_HAS_DEBUG_WX
 	select ARCH_HAS_DEVMEM_IS_ALLOWED
@@ -628,9 +629,6 @@ config ARCH_SPARSEMEM_ENABLE
 config ARCH_SPARSEMEM_DEFAULT
 	def_bool y
 
-config ARCH_ENABLE_SPLIT_PMD_PTLOCK
-	def_bool y
-
 config MAX_PHYSMEM_BITS
 	int "Maximum size of supported physical memory in bits (42-53)"
 	range 42 53
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 10702ef1eb57..5dd70c798167 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -63,6 +63,7 @@ config X86
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if x86_64 && HUGETLB_PAGE && MIGRATION
 	select ARCH_ENABLE_MEMORY_HOTPLUG if X86_64 || (X86_32 && HIGHMEM)
 	select ARCH_ENABLE_MEMORY_HOTREMOVE if MEMORY_HOTPLUG
+	select ARCH_ENABLE_SPLIT_PMD_PTLOCK if X86_64 || X86_PAE
 	select ARCH_ENABLE_THP_MIGRATION if x86_64 && TRANSPARENT_HUGEPAGE
 	select ARCH_HAS_ACPI_TABLE_UPGRADE	if ACPI
 	select ARCH_HAS_CACHE_LINE_SIZE
@@ -2431,10 +2432,6 @@ config USE_PERCPU_NUMA_NODE_ID
 	def_bool y
 	depends on NUMA
 
-config ARCH_ENABLE_SPLIT_PMD_PTLOCK
-	def_bool y
-	depends on X86_64 || X86_PAE
-
 menu "Power management and ACPI options"
 
 config ARCH_HIBERNATION_HEADER
-- 
2.20.1