On Wed, Dec 02, 2020 at 12:23:27AM -0500, Pavel Tatashin wrote:
> __gup_longterm_locked() has CMA || FS_DAX version and a common stub
> version. In the preparation of prohibiting longterm pinning of pages from
> movable zone make the CMA || FS_DAX version common, and delete the stub
> version.
>
> Signed-off-by: Pavel Tatashin <pasha.tatas...@soleen.com>
> ---
> mm/gup.c | 13 -------------
> 1 file changed, 13 deletions(-)
>
> diff --git a/mm/gup.c b/mm/gup.c
> index 3a76c005a3e2..0e2de888a8b0 100644
> --- a/mm/gup.c
> +++ b/mm/gup.c
> @@ -1567,7 +1567,6 @@ struct page *get_dump_page(unsigned long addr)
> }
> #endif /* CONFIG_ELF_CORE */
>
> -#if defined(CONFIG_FS_DAX) || defined (CONFIG_CMA)
> #ifdef CONFIG_FS_DAX
> static bool check_dax_vmas(struct vm_area_struct **vmas, long nr_pages)
> {
> @@ -1757,18 +1756,6 @@ static long __gup_longterm_locked(struct mm_struct *mm,
> kfree(vmas_tmp);
> return rc;
> }
Isn't this going to potentially allocate vmas_tmp only to not need it when
!FS_DAX and !CMA?
Ira
> -#else /* !CONFIG_FS_DAX && !CONFIG_CMA */
> -static __always_inline long __gup_longterm_locked(struct mm_struct *mm,
> - unsigned long start,
> - unsigned long nr_pages,
> - struct page **pages,
> - struct vm_area_struct **vmas,
> - unsigned int flags)
> -{
> - return __get_user_pages_locked(mm, start, nr_pages, pages, vmas,
> - NULL, flags);
> -}
> -#endif /* CONFIG_FS_DAX || CONFIG_CMA */
>
> static bool is_valid_gup_flags(unsigned int gup_flags)
> {
> --
> 2.25.1
>
>
