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SubjectRe: [PATCH RFC 05/24] userfaultfd: wp: add helper for writeprotect check
On Mon, Jan 21, 2019 at 03:57:03PM +0800, Peter Xu wrote:
> From: Shaohua Li <shli@fb.com>
>
> add helper for writeprotect check. Will use it later.

I'd merge this with the commit that actually uses this helper.

> Cc: Andrea Arcangeli <aarcange@redhat.com>
> Cc: Pavel Emelyanov <xemul@parallels.com>
> Cc: Rik van Riel <riel@redhat.com>
> Cc: Kirill A. Shutemov <kirill@shutemov.name>
> Cc: Mel Gorman <mgorman@suse.de>
> Cc: Hugh Dickins <hughd@google.com>
> Cc: Johannes Weiner <hannes@cmpxchg.org>
> Signed-off-by: Shaohua Li <shli@fb.com>
> Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
> include/linux/userfaultfd_k.h | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
> index 37c9eba75c98..38f748e7186e 100644
> --- a/include/linux/userfaultfd_k.h
> +++ b/include/linux/userfaultfd_k.h
> @@ -50,6 +50,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
> return vma->vm_flags & VM_UFFD_MISSING;
> }
>
> +static inline bool userfaultfd_wp(struct vm_area_struct *vma)
> +{
> + return vma->vm_flags & VM_UFFD_WP;
> +}
> +
> static inline bool userfaultfd_armed(struct vm_area_struct *vma)
> {
> return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
> @@ -94,6 +99,11 @@ static inline bool userfaultfd_missing(struct vm_area_struct *vma)
> return false;
> }
>
> +static inline bool userfaultfd_wp(struct vm_area_struct *vma)
> +{
> + return false;
> +}
> +
> static inline bool userfaultfd_armed(struct vm_area_struct *vma)
> {
> return false;
> --
> 2.17.1
>

--
Sincerely yours,
Mike.

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