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mm: use a folio in hugepage_add_anon_rmap() and hugepage_add_new_anon_rmap() 

Remove uses of compound_mapcount_ptr()

Link: https://lkml.kernel.org/r/20230111142915.1001531-11-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle) 2023-01-11 14:28:56 +00:00 committed by Andrew Morton
parent 65a689f35a
commit db4e5dbdcd
1 changed files with 7 additions and 4 deletions
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11
mm/rmap.c
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@ -2528,13 +2528,14 @@ void rmap_walk_locked(struct folio *folio, struct rmap_walk_control *rwc)
void hugepage_add_anon_rmap(struct page *page, struct vm_area_struct *vma,
unsigned long address, rmap_t flags)
{
struct folio *folio = page_folio(page);
struct anon_vma *anon_vma = vma->anon_vma;
int first;
BUG_ON(!PageLocked(page));
BUG_ON(!folio_test_locked(folio));
BUG_ON(!anon_vma);
/* address might be in next vma when migration races vma_adjust */
first = atomic_inc_and_test(compound_mapcount_ptr(page));
first = atomic_inc_and_test(&folio->_entire_mapcount);
VM_BUG_ON_PAGE(!first && (flags & RMAP_EXCLUSIVE), page);
VM_BUG_ON_PAGE(!first && PageAnonExclusive(page), page);
if (first)
@ -2545,10 +2546,12 @@ void hugepage_add_anon_rmap(struct page *page, struct vm_area_struct *vma,
void hugepage_add_new_anon_rmap(struct page *page,
struct vm_area_struct *vma, unsigned long address)
{
struct folio *folio = page_folio(page);
BUG_ON(address < vma->vm_start || address >= vma->vm_end);
/* increment count (starts at -1) */
atomic_set(compound_mapcount_ptr(page), 0);
ClearHPageRestoreReserve(page);
atomic_set(&folio->_entire_mapcount, 0);
folio_clear_hugetlb_restore_reserve(folio);
__page_set_anon_rmap(page, vma, address, 1);
}
#endif /* CONFIG_HUGETLB_PAGE */