Re: [PATCH v2 1/4] mm: ksm: have KSM VMA checks not require a VMA pointer

[<xu.xin16@zte.com.cn>]

> In subsequent commits we are going to determine KSM eligibility prior to a
> VMA being constructed, at which point we will of course not yet have access
> to a VMA pointer.
> 
> It is trivial to boil down the check logic to be parameterised on
> mm_struct, file and VMA flags, so do so.
> 
> As a part of this change, additionally expose and use file_is_dax() to
> determine whether a file is being mapped under a DAX inode.
> 
> Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
> Acked-by: David Hildenbrand <david@redhat.com>
> Reviewed-by: Chengming Zhou <chengming.zhou@linux.dev>
> ---
>  include/linux/fs.h |  7 ++++++-
>  mm/ksm.c           | 32 ++++++++++++++++++++------------
>  2 files changed, 26 insertions(+), 13 deletions(-)

All looks good to me.

Reviewed-by: Xu Xin <xu.xin16@zte.com.cn>