Re: mmotm 2021-12-29-20-07 uploaded (mm/damon)

[Baolin Wang]

Hi,

On 12/30/2021 2:27 PM, Randy Dunlap wrote:
> Hi--
>
> On 12/29/21 20:07, akpm@xxxxxxxxxxxxxxxxxxxx wrote:
> > The mm-of-the-moment snapshot 2021-12-29-20-07 has been uploaded to
> >
> >     https://www.ozlabs.org/~akpm/mmotm/
> >
> > mmotm-readme.txt says
> >
> > README for mm-of-the-moment:
> >
> > https://www.ozlabs.org/~akpm/mmotm/
> >
> > This is a snapshot of my -mm patch queue.  Uploaded at random hopefully
> > more than once a week.
> >
> > You will need quilt to apply these patches to the latest Linus release (5.x
> > or 5.x-rcY).  The series file is in broken-out.tar.gz and is duplicated in
> > https://ozlabs.org/~akpm/mmotm/series
> >
> > The file broken-out.tar.gz contains two datestamp files: .DATE and
> > .DATE-yyyy-mm-dd-hh-mm-ss.  Both contain the string yyyy-mm-dd-hh-mm-ss,
> > followed by the base kernel version against which this patch series is to
> > be applied.
>
>
> On i386:
>
> ../mm/damon/vaddr.c: In function ‘damon_hugetlb_mkold’:
> ../mm/damon/vaddr.c:402:17: warning: unused variable ‘h’ [-Wunused-variable]
>    struct hstate *h = hstate_vma(vma);

Ah, thanks for report, I think below changes can fix the warning. And 
I'll send a new version to address this warning.

diff --git a/mm/damon/vaddr.c b/mm/damon/vaddr.c
index bcdc602..25bff8a 100644
--- a/mm/damon/vaddr.c
+++ b/mm/damon/vaddr.c
@@ -397,7 +397,6 @@ static void damon_hugetlb_mkold(pte_t *pte, struct 
mm_struct *mm,
                                struct vm_area_struct *vma, unsigned 
long addr)
 {
        bool referenced = false;
-       struct hstate *h = hstate_vma(vma);
        pte_t entry = huge_ptep_get(pte);
        struct page *page = pte_page(entry);

@@ -414,7 +413,7 @@ static void damon_hugetlb_mkold(pte_t *pte, struct 
mm_struct *mm,
        }

 #ifdef CONFIG_MMU_NOTIFIER
-       if (mmu_notifier_clear_young(mm, addr, addr + huge_page_size(h)))
+       if (mmu_notifier_clear_young(mm, addr, addr + 
huge_page_size(hstate_vma(vma))))
                referenced = true;
 #endif /* CONFIG_MMU_NOTIFIER */