Re: [PATCH v2 09/13] mm: update all remaining mmap_prepare users to use vma_flags_t

On Thu, Jan 22, 2026 at 04:06:18PM +0000, Lorenzo Stoakes wrote:
> We will be shortly removing the vm_flags_t field from vm_area_desc so we
> need to update all mmap_prepare users to only use the dessc->vma_flags
> field.
> 
> This patch achieves that and makes all ancillary changes required to make
> this possible.
> 
> This lays the groundwork for future work to eliminate the use of vm_flags_t
> in vm_area_desc altogether and more broadly throughout the kernel.
> 
> While we're here, we take the opportunity to replace VM_REMAP_FLAGS with
> VMA_REMAP_FLAGS, the vma_flags_t equivalent.
> 
> No functional changes intended.
> 
> Signed-off-by: Lorenzo Stoakes <[email protected]>
> ---
>  drivers/char/mem.c       |  6 +++---
>  drivers/dax/device.c     | 10 +++++-----
>  fs/aio.c                 |  2 +-
>  fs/erofs/data.c          |  5 +++--
>  fs/ext4/file.c           |  4 ++--
>  fs/ntfs3/file.c          |  2 +-
>  fs/orangefs/file.c       |  4 ++--
>  fs/ramfs/file-nommu.c    |  2 +-
>  fs/resctrl/pseudo_lock.c |  2 +-
>  fs/romfs/mmap-nommu.c    |  2 +-
>  fs/xfs/xfs_file.c        |  4 ++--
>  fs/zonefs/file.c         |  3 ++-
>  include/linux/dax.h      |  8 ++++----
>  include/linux/mm.h       | 24 +++++++++++++++++++-----
>  kernel/relay.c           |  2 +-
>  mm/memory.c              | 17 ++++++++---------
>  16 files changed, 56 insertions(+), 41 deletions(-)
> 

<snip to xfs>

> diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
> index 7874cf745af3..1238ec018bc7 100644
> --- a/fs/xfs/xfs_file.c
> +++ b/fs/xfs/xfs_file.c
> @@ -1974,14 +1974,14 @@ xfs_file_mmap_prepare(
>  	 * We don't support synchronous mappings for non-DAX files and
>  	 * for DAX files if underneath dax_device is not synchronous.
>  	 */
> -	if (!daxdev_mapping_supported(desc->vm_flags, file_inode(file),
> +	if (!daxdev_mapping_supported(desc, file_inode(file),
>  				      target->bt_daxdev))
>  		return -EOPNOTSUPP;
>  
>  	file_accessed(file);
>  	desc->vm_ops = &xfs_file_vm_ops;
>  	if (IS_DAX(inode))
> -		desc->vm_flags |= VM_HUGEPAGE;
> +		vma_desc_set_flags(desc, VMA_HUGEPAGE_BIT);

Looks good to me,
Acked-by: "Darrick J. Wong" <[email protected]>

--D

>  	return 0;
>  }
>