+ mm-_install_special_mapping-apply-vm_locked_clear_mask.patch added to -mm tree

+ mm-_install_special_mapping-apply-vm_locked_clear_mask.patch added to -mm tree

[Andrew Morton]

The patch titled
     Subject: mm: _install_special_mapping() apply VM_LOCKED_CLEAR_MASK
has been added to the -mm tree.  Its filename is
     mm-_install_special_mapping-apply-vm_locked_clear_mask.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/mm-_install_special_mapping-apply-vm_locked_clear_mask.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/mm-_install_special_mapping-apply-vm_locked_clear_mask.patch

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The -mm tree is included into linux-next and is updated
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------------------------------------------------------
From: Hugh Dickins <hughd@google.com>
Subject: mm: _install_special_mapping() apply VM_LOCKED_CLEAR_MASK

_install_special_mapping() adds the VM_SPECIAL bit VM_DONTEXPAND (and
never attempts to update locked_vm), so it ought to be consistent with
mmap_region() and mlock_fixup(), making sure not to add VM_LOCKED or
VM_LOCKONFAULT.  I doubt that this fixes any problem in practice: just do
it for consistency.

Link: https://lkml.kernel.org/r/a85315a9-21d1-6133-c5fc-c89863dfb25b@google.com
Signed-off-by: Hugh Dickins <hughd@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mmap.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/mmap.c~mm-_install_special_mapping-apply-vm_locked_clear_mask
+++ a/mm/mmap.c
@@ -3448,6 +3448,7 @@ static struct vm_area_struct *__install_
 	vma->vm_end = addr + len;
 
 	vma->vm_flags = vm_flags | mm->def_flags | VM_DONTEXPAND | VM_SOFTDIRTY;
+	vma->vm_flags &= VM_LOCKED_CLEAR_MASK;
 	vma->vm_page_prot = vm_get_page_prot(vma->vm_flags);
 
 	vma->vm_ops = ops;
_

Patches currently in -mm which might be from hughd@google.com are

memfd-fix-f_seal_write-after-shmem-huge-page-allocated.patch
tmpfs-support-for-file-creation-time-fix.patch
mm-_install_special_mapping-apply-vm_locked_clear_mask.patch
mm-thp-refix-__split_huge_pmd_locked-for-migration-pmd.patch
mm-thp-clearpagedoublemap-in-first-page_add_file_rmap.patch
mm-thp-fix-nr_file_mapped-accounting-in-page__file_rmap.patch