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SubjectRe: [PATCH v7 1/9] fs: Constify vma argument to vma_is_dax
> From: "Thomas Hellstrom (VMware)" <thomas_os@shipmail.org>
>
> The function is used by upcoming vma_is_special_huge() with which we want
> to use a const vma argument. Since for vma_is_dax() the vma argument is
> only dereferenced for reading, constify it.
>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Michal Hocko <mhocko@suse.com>
> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
> Cc: Ralph Campbell <rcampbell@nvidia.com>
> Cc: "Jérôme Glisse" <jglisse@redhat.com>
> Cc: "Christian König" <christian.koenig@amd.com>
> Cc: Dan Williams <dan.j.williams@intel.com>
> Signed-off-by: Thomas Hellstrom (VMware) <thomas_os@shipmail.org>
> Reviewed-by: Roland Scheidegger <sroland@vmware.com>
> Acked-by: Christian König <christian.koenig@amd.com>
> ---
> include/linux/fs.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/include/linux/fs.h b/include/linux/fs.h
> index 3cd4fe6b845e..2b38ce5b73ad 100644
> --- a/include/linux/fs.h
> +++ b/include/linux/fs.h
> @@ -3391,7 +3391,7 @@ static inline bool io_is_direct(struct file *filp)
> return (filp->f_flags & O_DIRECT) || IS_DAX(filp->f_mapping->host);
> }
>
> -static inline bool vma_is_dax(struct vm_area_struct *vma)
> +static inline bool vma_is_dax(const struct vm_area_struct *vma)
> {
> return vma->vm_file && IS_DAX(vma->vm_file->f_mapping->host);
> }
> --
Acked-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com>

> 2.21.1
>
>

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