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However, the third argument to > flush_cache_page() is a PFN, while addr + HPAGE_PMD_SIZE is an end > virtual address. > > More importantly, the mapping being invalidated is PMD-sized rather > than PAGE_SIZE-sized. Flush the whole PMD range with > flush_cache_range(), matching other huge PMD invalidation paths. > > Fixes: a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages") > Signed-off-by: Hui Su > --- > mm/migrate_device.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/mm/migrate_device.c b/mm/migrate_device.c > index 908d2d4ec43a..098c04c1b124 100644 > --- a/mm/migrate_device.c > +++ b/mm/migrate_device.c > @@ -872,7 +872,7 @@ static int migrate_vma_insert_huge_pmd_page(struct migrate_vma *migrate, > > if (flush) { > pte_free(vma->vm_mm, pgtable); > - flush_cache_page(vma, addr, addr + HPAGE_PMD_SIZE); > + flush_cache_range(vma, addr, addr + HPAGE_PMD_SIZE); > pmdp_invalidate(vma, addr, pmdp); > } else { > pgtable_trans_huge_deposit(vma->vm_mm, pmdp, pgtable); Reviewed-by: Balbir Singh