On 2/5/21 1:05 PM, Max Filippov wrote: > On Thu, Feb 4, 2021 at 8:10 PM Anshuman Khandual > <anshuman.khandual@xxxxxxx> wrote: >> >> 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. >> >> Cc: Russell King <linux@xxxxxxxxxxxxxxx> >> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> >> 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> >> Cc: Max Filippov <jcmvbkbc@xxxxxxxxx> >> Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx >> Cc: linux-mips@xxxxxxxxxxxxxxx >> Cc: linuxppc-dev@xxxxxxxxxxxxxxxx >> Cc: linux-xtensa@xxxxxxxxxxxxxxxx >> Cc: linux-mm@xxxxxxxxx >> Cc: linux-kernel@xxxxxxxxxxxxxxx >> Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx> >> --- >> This patch applies on v5.11-rc6 and has been tested on arm64 platform. But >> it has been just build tested on all other platforms. >> >> 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(-) > > Anshuman, entries in arch/*/Konfig files are sorted in alphabetical order, > please keep them that way. Sure, will fix up and resend. > > Reviewed-by: Max Filippov <jcmvbkbc@xxxxxxxxx> >
