mm/memory_hotplug: simplify ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE kconfig

Patch series "Add support for memmap on memory feature on ppc64", v8.

This patch series update memmap on memory feature to fall back to
memmap allocation outside the memory block if the alignment rules are
not met. This makes the feature more useful on architectures like
ppc64 where alignment rules are different with 64K page size.

This patch (of 6):

Instead of adding menu entry with all supported architectures, add
mm/Kconfig variable and select the same from supported architectures.

No functional change in this patch.

Link: https://lkml.kernel.org/r/20230808091501.287660-1-aneesh.kumar@linux.ibm.com
Link: https://lkml.kernel.org/r/20230808091501.287660-2-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oscar Salvador <osalvador@suse.de>
Cc: Vishal Verma <vishal.l.verma@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 751d8c8..a7a8832 100644 (file)
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -78,6 +78,7 @@ config ARM64
        select ARCH_INLINE_SPIN_UNLOCK_IRQ if !PREEMPTION
        select ARCH_INLINE_SPIN_UNLOCK_IRQRESTORE if !PREEMPTION
        select ARCH_KEEP_MEMBLOCK
+       select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
        select ARCH_USE_CMPXCHG_LOCKREF
        select ARCH_USE_GNU_PROPERTY
        select ARCH_USE_MEMTEST
@@ -349,9 +350,6 @@ config GENERIC_CSUM
 config GENERIC_CALIBRATE_DELAY
        def_bool y
 
-config ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
-       def_bool y
-
 config SMP
        def_bool y
 

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 78224aa..d0258e9 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -102,6 +102,7 @@ config X86
        select ARCH_HAS_DEBUG_WX
        select ARCH_HAS_ZONE_DMA_SET if EXPERT
        select ARCH_HAVE_NMI_SAFE_CMPXCHG
+       select ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
        select ARCH_MIGHT_HAVE_ACPI_PDC         if ACPI
        select ARCH_MIGHT_HAVE_PC_PARPORT
        select ARCH_MIGHT_HAVE_PC_SERIO
@@ -2610,9 +2611,6 @@ config ARCH_HAS_ADD_PAGES
        def_bool y
        depends on ARCH_ENABLE_MEMORY_HOTPLUG
 
-config ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
-       def_bool y
-
 menu "Power management and ACPI options"
 
 config ARCH_HIBERNATION_HEADER

diff --git a/mm/Kconfig b/mm/Kconfig
index 5fe49c0..721dc88 100644 (file)
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -571,6 +571,9 @@ config MHP_MEMMAP_ON_MEMORY
 
 endif # MEMORY_HOTPLUG
 
+config ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE
+       bool
+
 # Heavily threaded applications may benefit from splitting the mm-wide
 # page_table_lock, so that faults on different parts of the user address
 # space can be handled with less contention: split it at this NR_CPUS.