The patch titled
Subject: mm/memtest: add ARCH_USE_MEMTEST
has been added to the -mm tree. Its filename is
mm-memtest-add-arch_use_memtest.patch
This patch should soon appear at
https://ozlabs.org/~akpm/mmots/broken-out/mm-memtest-add-arch_use_memtest.patch
and later at
https://ozlabs.org/~akpm/mmotm/broken-out/mm-memtest-add-arch_use_memtest.patch
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------------------------------------------------------
From: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Subject: mm/memtest: add ARCH_USE_MEMTEST
early_memtest() does not get called from all architectures. Hence
enabling CONFIG_MEMTEST and providing a valid memtest=[1..N] kernel
command line option might not trigger the memory pattern tests as would be
expected in normal circumstances. This situation is misleading.
The change here prevents the above mentioned problem after introducing a
new config option ARCH_USE_MEMTEST that should be subscribed on platforms
that call early_memtest(), in order to enable the config CONFIG_MEMTEST.
Conversely CONFIG_MEMTEST cannot be enabled on platforms where it would
not be tested anyway.
Link: https://lkml.kernel.org/r/1617269193-22294-1-git-send-email-anshuman.khandual@xxxxxxx
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> (arm64)
Reviewed-by: Max Filippov <jcmvbkbc@xxxxxxxxx>
Cc: Russell King <linux@xxxxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Cc: Thomas Bogendoerfer <tsbogend@xxxxxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Chris Zankel <chris@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/arm/Kconfig | 1 +
arch/arm64/Kconfig | 1 +
arch/mips/Kconfig | 1 +
arch/powerpc/Kconfig | 1 +
arch/x86/Kconfig | 1 +
arch/xtensa/Kconfig | 1 +
lib/Kconfig.debug | 9 ++++++++-
7 files changed, 14 insertions(+), 1 deletion(-)
--- a/arch/arm64/Kconfig~mm-memtest-add-arch_use_memtest
+++ a/arch/arm64/Kconfig
@@ -67,6 +67,7 @@ config ARM64
select ARCH_KEEP_MEMBLOCK
select ARCH_USE_CMPXCHG_LOCKREF
select ARCH_USE_GNU_PROPERTY
+ select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_USE_SYM_ANNOTATIONS
--- a/arch/arm/Kconfig~mm-memtest-add-arch_use_memtest
+++ a/arch/arm/Kconfig
@@ -33,6 +33,7 @@ config ARM
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF
+ select ARCH_USE_MEMTEST
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
select ARCH_WANT_IPC_PARSE_VERSION
select ARCH_WANT_LD_ORPHAN_WARN
--- a/arch/mips/Kconfig~mm-memtest-add-arch_use_memtest
+++ a/arch/mips/Kconfig
@@ -14,6 +14,7 @@ config MIPS
select ARCH_SUPPORTS_UPROBES
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
+ select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
--- a/arch/powerpc/Kconfig~mm-memtest-add-arch_use_memtest
+++ a/arch/powerpc/Kconfig
@@ -149,6 +149,7 @@ config PPC
select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC32 || PPC_BOOK3S_64
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF if PPC64
+ select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS if PPC_QUEUED_SPINLOCKS
select ARCH_USE_QUEUED_SPINLOCKS if PPC_QUEUED_SPINLOCKS
select ARCH_WANT_IPC_PARSE_VERSION
--- a/arch/x86/Kconfig~mm-memtest-add-arch_use_memtest
+++ a/arch/x86/Kconfig
@@ -100,6 +100,7 @@ config X86
select ARCH_SUPPORTS_LTO_CLANG if X86_64
select ARCH_SUPPORTS_LTO_CLANG_THIN if X86_64
select ARCH_USE_BUILTIN_BSWAP
+ select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_USE_SYM_ANNOTATIONS
--- a/arch/xtensa/Kconfig~mm-memtest-add-arch_use_memtest
+++ a/arch/xtensa/Kconfig
@@ -7,6 +7,7 @@ config XTENSA
select ARCH_HAS_SYNC_DMA_FOR_CPU if MMU
select ARCH_HAS_SYNC_DMA_FOR_DEVICE if MMU
select ARCH_HAS_DMA_SET_UNCACHED if MMU
+ select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
select ARCH_WANT_FRAME_POINTERS
--- a/lib/Kconfig.debug~mm-memtest-add-arch_use_memtest
+++ a/lib/Kconfig.debug
@@ -2520,11 +2520,18 @@ config TEST_FPU
endif # RUNTIME_TESTING_MENU
+config ARCH_USE_MEMTEST
+ bool
+ help
+ An architecture should select this when it uses early_memtest()
+ during boot process.
+
config MEMTEST
bool "Memtest"
+ depends on ARCH_USE_MEMTEST
help
This option adds a kernel parameter 'memtest', which allows memtest
- to be set.
+ to be set and executed.
memtest=0, mean disabled; -- default
memtest=1, mean do 1 test pattern;
...
_
Patches currently in -mm which might be from anshuman.khandual@xxxxxxx are
mm-memtest-add-arch_use_memtest.patch
mm-generalize-hugetlb_page_size_variable.patch
mm-generalize-arch_has_cache_line_size.patch
mm-generalize-sys_supports_hugetlbfs-rename-as-arch_supports_hugetlbfs.patch
mm-generalize-arch_enable_memory_.patch
mm-drop-redundant-arch_enable__migration.patch
mm-drop-redundant-arch_enable_split_pmd_ptlock.patch
mm-drop-redundant-have_arch_transparent_hugepage.patch
