Commit dce44566 authored by Anshuman Khandual's avatar Anshuman Khandual Committed by Linus Torvalds
Browse files

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@arm.com


Signed-off-by: default avatarAnshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com> (arm64)
Reviewed-by: default avatarMax Filippov <jcmvbkbc@gmail.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will@kernel.org>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent f58bd538

arch/arm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/arm64/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/mips/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 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

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/x86/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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