On Wed, Dec 02, 2020 at 08:31:45AM -0800, 'Ira Weiny' wrote:
> 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.tatashin@xxxxxxxxxx>
> > ---
> > 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?
To clarify, when FOLL_LONGTERM is set...
IRa
>
> 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
> >
> >
>
