tree b258b0475bcab6addf242f6335a79414000ee111
parent bbe9bdcd2305b36ca2bd21b962250431316213cd
author Peter Xu <peterx@redhat.com> 1616047306 +1100
committer Tim Zimmermann <tim@linux4.de> 1721966657 +0200
gpgsig -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEuwYxAyE4TRnuhLgPbcIaY/gZxe8FAmajIEEACgkQbcIaY/gZ
 xe8cyA//XVrQ7deBmKKT4iSEhj48ZaJ8B18NzMkIzc5AMAzBRauHWqfXN+jcWKVK
 0Ronc3b2n+0UiBJd1M6IlO1ZAu9NitWHSw8dVM0VXg8DyyobKGtjcrdTpybKJJsl
 vckIJVrTI0mffszFsbKurkLjsZMUeSHcoYdRvc+FR78sDyDU5hYEOXOXpskNpIvG
 FfgPC/1G7K+LjmASTyrpHP9BQY7wZg+pHnJD/DJCywTbkI59ghq9brCacYLjUSkZ
 oTLE5hECtdUEWt4gMauyPNIq3LWpKUKjLswVUEQ77QiV2aWQ/jLnJVOO3meGrUQ+
 ASzR1dI2PtnnFCQgm51eze2LzvfJ4zUtvHHcJqonQZtf4L0oz5AzwzC2SvUjEFXn
 sXan0Cf4ATuvk1BLan3jWUzAuW3HkBENvreTZDNou5EElnLiCP03VgFjSUSYsHaL
 uGkN28FrhlRaHhkBANdLRiTQP975N9c0DJtGpX1pc2Eq9iy4uG6rUDqDcGiwdDbM
 tQuODOvTADjK6SeZttghkHIdZKXXySFjMzM7Acf5KvOiqPI/zRAayAKzI+KQ7Zho
 4cURTZ2UgpxoNPi94I7U++jL3/lycp7TwS+vIySxcXUjKI/GZJJmBCQtQ3LJHhpE
 MEc3En1WHfW24nx0hEzfW9iuxQO5jncW9t7+A7n10SJRdL8YyiQ=
 =0pp0
 -----END PGP SIGNATURE-----

BACKPORT: FROMGIT: hugetlb: pass vma into huge_pte_alloc() and huge_pmd_share()

Patch series "hugetlb: Disable huge pmd unshare for uffd-wp", v4.

This series tries to disable huge pmd unshare of hugetlbfs backed memory
for uffd-wp.  Although uffd-wp of hugetlbfs is still during rfc stage, the
idea of this series may be needed for multiple tasks (Axel's uffd minor
fault series, and Mike's soft dirty series), so I picked it out from the
larger series.

This patch (of 4):

It is a preparation work to be able to behave differently in the per
architecture huge_pte_alloc() according to different VMA attributes.

Pass it deeper into huge_pmd_share() so that we can avoid the find_vma() call.

Link: https://lkml.kernel.org/r/20210218230633.15028-1-peterx@redhat.com
Link: https://lkml.kernel.org/r/20210218230633.15028-2-peterx@redhat.com
Signed-off-by: Peter Xu <peterx@redhat.com>
Suggested-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Adam Ruprecht <ruprecht@google.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Anshuman Khandual <anshuman.khandual@arm.com>
Cc: Axel Rasmussen <axelrasmussen@google.com>
Cc: Cannon Matthews <cannonmatthews@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chinwen Chang <chinwen.chang@mediatek.com>
Cc: David Rientjes <rientjes@google.com>
Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jann Horn <jannh@google.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: "Michal Koutn" <mkoutny@suse.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: Nicholas Piggin <npiggin@gmail.com>
Cc: Oliver Upton <oupton@google.com>
Cc: Shaohua Li <shli@fb.com>
Cc: Shawn Anastasio <shawn@anastas.io>
Cc: Steven Price <steven.price@arm.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>

(cherry picked from commit b92dc1bfd52ecf338c024815a7c1d44e37a507a1
https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git akpm)
Link: https://lore.kernel.org/patchwork/patch/1382205/

Conflicts:
	arch/sparc/mm/hugetlbpage.c
	mm/hugetlb.c
	mm/userfaultfd.c

(1. manual rebase,
 2. c0d0381ade79885c04a04c303284b040616b116e wasn't CP'ed. Rebased by
 appropriately updating huge_pte_alloc(),
 3. manual rebase)

Signed-off-by: Lokesh Gidra <lokeshgidra@google.com>
Bug: 160737021
Bug: 169683130
Change-Id: I50db4e27f2951a5ee01b0dfa22c1ece34e79f881