On 11/26/2015 03:10 PM, Mark Rutland wrote: > Hi Catalin, > > Can you pick up Andrey's patch below for v4.4, until we have a better > solution? > FYI, better solution is almost ready, I'm going to send it today. However, I don't know for sure whether it works or not :) I'm not able to test as I don't have any setup working with 16k pages. > I stumbled across this myself and was about to post a similar patch. > > FWIW: > > Acked-by: Mark Rutland <mark.rutland@xxxxxxx> > > Thanks, > Mark. > > On Tue, Nov 17, 2015 at 06:47:08PM +0300, Andrey Ryabinin wrote: >> We should either add proper Kconfig dependency for now, or just make it work. >> >> >> From: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> >> Subject: [PATCH] arm64: KASAN depends on !(ARM64_16K_PAGES && ARM64_VA_BITS_48) >> >> On KASAN + 16K_PAGES + 48BIT_VA >> arch/arm64/mm/kasan_init.c: In function ‘kasan_early_init’: >> include/linux/compiler.h:484:38: error: call to ‘__compiletime_assert_95’ declared with attribute error: BUILD_BUG_ON failed: !IS_ALIGNED(KASAN_SHADOW_END, PGDIR_SIZE) >> _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) >> >> Currently KASAN will not work on 16K_PAGES and 48BIT_VA, so >> forbid such configuration to avoid above build failure. >> >> Reported-by: Suzuki K. Poulose <Suzuki.Poulose@xxxxxxx> >> Signed-off-by: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> >> --- >> arch/arm64/Kconfig | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig >> index 9ac16a4..bf7de69 100644 >> --- a/arch/arm64/Kconfig >> +++ b/arch/arm64/Kconfig >> @@ -49,7 +49,7 @@ config ARM64 >> select HAVE_ARCH_AUDITSYSCALL >> select HAVE_ARCH_BITREVERSE >> select HAVE_ARCH_JUMP_LABEL >> - select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP >> + select HAVE_ARCH_KASAN if SPARSEMEM_VMEMMAP && !(ARM64_16K_PAGES && ARM64_VA_BITS_48) >> select HAVE_ARCH_KGDB >> select HAVE_ARCH_SECCOMP_FILTER >> select HAVE_ARCH_TRACEHOOK >> -- >> 2.4.10 >> >> >> _______________________________________________ >> linux-arm-kernel mailing list >> linux-arm-kernel@xxxxxxxxxxxxxxxxxxx >> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel >> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>