The patch titled
Subject: mm/userfaultfd: disable userfaultfd-wp on x86_32
has been added to the -mm tree. Its filename is
mm-userfaultfd-disable-userfaultfd-wp-on-x86_32.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-userfaultfd-disable-userfaultfd-wp-on-x86_32.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-userfaultfd-disable-userfaultfd-wp-on-x86_32.patch
Before you just go and hit "reply", please:
a) Consider who else should be cc'ed
b) Prefer to cc a suitable mailing list as well
c) Ideally: find the original patch on the mailing list and do a
reply-to-all to that, adding suitable additional cc's
*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***
The -mm tree is included into linux-next and is updated
there every 3-4 working days
------------------------------------------------------
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
@@ -150,7 +150,7 @@ 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
_
Patches currently in -mm which might be from peterx@xxxxxxxxxx are
mm-userfaultfd-disable-userfaultfd-wp-on-x86_32.patch
