From: Peter Xu <peterx@xxxxxxxxxx> Subject: 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. Link: http://lkml.kernel.org/r/20200413141608.109211-1-peterx@xxxxxxxxxx Fixes: 5a281062af1d ("userfaultfd: wp: add WP pagetable tracking to x86") Signed-off-by: Peter Xu <peterx@xxxxxxxxxx> Reported-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> Reported-by: kernel test robot <lkp@xxxxxxxxx> Tested-by: Naresh Kamboju <naresh.kamboju@xxxxxxxxxx> Reviewed-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> Cc: Hillf Danton <hdanton@xxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/x86/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/arch/x86/Kconfig~mm-userfaultfd-disable-userfaultfd-wp-on-x86_32 +++ a/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 _
