[PATCH 1/6] mm: Generalize ARCH_HAS_CACHE_LINE_SIZE

[Anshuman Khandual]

ARCH_HAS_CACHE_LINE_SIZE config has duplicate definitions on platforms that
subscribe it. Instead, just make it a generic option which can be selected
on applicable platforms. This change reduces code duplication and makes it
cleaner.

Cc: Vineet Gupta <vgu...@synopsys.com>
Cc: Catalin Marinas <catalin.mari...@arm.com>
Cc: Will Deacon <w...@kernel.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Cc: Ingo Molnar <mi...@redhat.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: "H. Peter Anvin" <h...@zytor.com>
Cc: Andrew Morton <a...@linux-foundation.org>
Cc: x...@kernel.org
Cc: linux-snps-...@lists.infradead.org
Cc: linux-arm-ker...@lists.infradead.org
Cc: linux...@kvack.org
Cc: linux-ker...@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khand...@arm.com>
---
 arch/arc/Kconfig   | 4 +---
 arch/arm64/Kconfig | 4 +---
 arch/x86/Kconfig   | 4 +---
 mm/Kconfig         | 3 +++
 4 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig
index bc8d6aecfbbd..fab05f7189c0 100644
--- a/arch/arc/Kconfig
+++ b/arch/arc/Kconfig
@@ -6,6 +6,7 @@
 config ARC
        def_bool y
        select ARC_TIMERS
+       select ARCH_HAS_CACHE_LINE_SIZE
        select ARCH_HAS_DEBUG_VM_PGTABLE
        select ARCH_HAS_DMA_PREP_COHERENT
        select ARCH_HAS_PTE_SPECIAL
@@ -48,9 +49,6 @@ config ARC
        select HAVE_ARCH_JUMP_LABEL if ISA_ARCV2 && !CPU_ENDIAN_BE32
        select SET_FS
 
-config ARCH_HAS_CACHE_LINE_SIZE
-       def_bool y
-
 config TRACE_IRQFLAGS_SUPPORT
        def_bool y
 
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 1f212b47a48a..606a2323e002 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -11,6 +11,7 @@ config ARM64
        select ACPI_PPTT if ACPI
        select ARCH_HAS_DEBUG_WX
        select ARCH_BINFMT_ELF_STATE
+       select ARCH_HAS_CACHE_LINE_SIZE
        select ARCH_HAS_DEBUG_VIRTUAL
        select ARCH_HAS_DEBUG_VM_PGTABLE
        select ARCH_HAS_DMA_PREP_COHERENT
@@ -1057,9 +1058,6 @@ config SYS_SUPPORTS_HUGETLBFS
 
 config ARCH_WANT_HUGE_PMD_SHARE
 
-config ARCH_HAS_CACHE_LINE_SIZE
-       def_bool y
-
 config ARCH_ENABLE_SPLIT_PMD_PTLOCK
        def_bool y if PGTABLE_LEVELS > 2
 
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 2792879d398e..51d171abb57a 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -61,6 +61,7 @@ config X86
        select ARCH_32BIT_OFF_T                 if X86_32
        select ARCH_CLOCKSOURCE_INIT
        select ARCH_HAS_ACPI_TABLE_UPGRADE      if ACPI
+       select ARCH_HAS_CACHE_LINE_SIZE
        select ARCH_HAS_DEBUG_VIRTUAL
        select ARCH_HAS_DEBUG_VM_PGTABLE        if !X86_PAE
        select ARCH_HAS_DEVMEM_IS_ALLOWED
@@ -313,9 +314,6 @@ config GENERIC_CALIBRATE_DELAY
 config ARCH_HAS_CPU_RELAX
        def_bool y
 
-config ARCH_HAS_CACHE_LINE_SIZE
-       def_bool y
-
 config ARCH_HAS_FILTER_PGPROT
        def_bool y
 
diff --git a/mm/Kconfig b/mm/Kconfig
index 24c045b24b95..1c9a37fc651a 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -760,6 +760,9 @@ config IDLE_PAGE_TRACKING
          See Documentation/admin-guide/mm/idle_page_tracking.rst for
          more details.
 
+config ARCH_HAS_CACHE_LINE_SIZE
+       bool
+
 config ARCH_HAS_PTE_DEVMAP
        bool
 
-- 
2.20.1