* [PATCH] mm/userfaultfd: Disable userfaultfd-wp on x86_32
@ 2020-04-13 14:16 Peter Xu
2020-04-13 18:35 ` Andrea Arcangeli
0 siblings, 1 reply; 2+ messages in thread
From: Peter Xu @ 2020-04-13 14:16 UTC (permalink / raw)
To: linux-kernel, linux-mm
Cc: peterx, Andrew Morton, Andrea Arcangeli, Hillf Danton,
Naresh Kamboju, kernel test robot
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")
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hillf Danton <hdanton@sina.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reported-by: kernel test robot <lkp@intel.com>
Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
arch/x86/Kconfig | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 8d078642b4be..7a7d2db366a3 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
--
2.24.1
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: [PATCH] mm/userfaultfd: Disable userfaultfd-wp on x86_32
2020-04-13 14:16 [PATCH] mm/userfaultfd: Disable userfaultfd-wp on x86_32 Peter Xu
@ 2020-04-13 18:35 ` Andrea Arcangeli
0 siblings, 0 replies; 2+ messages in thread
From: Andrea Arcangeli @ 2020-04-13 18:35 UTC (permalink / raw)
To: Peter Xu
Cc: linux-kernel, linux-mm, Andrew Morton, Hillf Danton,
Naresh Kamboju, kernel test robot
On Mon, Apr 13, 2020 at 10:16:08AM -0400, Peter Xu wrote:
> 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")
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Andrea Arcangeli <aarcange@redhat.com>
> Cc: Hillf Danton <hdanton@sina.com>
> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> Reported-by: kernel test robot <lkp@intel.com>
> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
> arch/x86/Kconfig | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Thanks,
Andrea
^ permalink raw reply [flat|nested] 2+ messages in thread
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