From b64d8d1e1ba5ba041e4407056a723c25a7052c49 Mon Sep 17 00:00:00 2001 From: Peter Xu Date: Mon, 20 Apr 2020 18:13:45 -0700 Subject: [PATCH] mm/userfaultfd: disable userfaultfd-wp on x86_32 Userfaultfd-wp is not yet working on 32bit hosts, but it's accidentally enabled previously. Disable it. Fixes: 5a281062af1d ("userfaultfd: wp: add WP pagetable tracking to x86") Reported-by: Naresh Kamboju Reported-by: kernel test robot Signed-off-by: Peter Xu Signed-off-by: Andrew Morton Tested-by: Naresh Kamboju Reviewed-by: Andrea Arcangeli Cc: Hillf Danton Link: http://lkml.kernel.org/r/20200413141608.109211-1-peterx@redhat.com Signed-off-by: Linus Torvalds --- arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1d6104ea8af0..1197b5596d5a 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -149,7 +149,7 @@ config X86 select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64 - select HAVE_ARCH_USERFAULTFD_WP if USERFAULTFD + select HAVE_ARCH_USERFAULTFD_WP if X86_64 && USERFAULTFD select HAVE_ARCH_VMAP_STACK if X86_64 select HAVE_ARCH_WITHIN_STACK_FRAMES select HAVE_ASM_MODVERSIONS