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ptdesc: remove references to folios from __pagetable_ctor() and pagetable_dtor()

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In preparation for splitting struct ptdesc from struct page and struct
folio, remove mentions of struct folio from these functions.  Introduce
ptdesc_nr_pages() to avoid using lruvec_stat_add/sub_folio()

Link: https://lkml.kernel.org/r/20250908171104.2409217-3-willy@infradead.org
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Matthew Wilcox (Oracle)
2025-09-08 18:11:01 +01:00
committed by Andrew Morton
parent 522abd9227
commit f0c92726e8
1 changed files with 13 additions and 8 deletions
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21
include/linux/mm.h
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@@ -2097,9 +2097,9 @@ static inline long folio_nr_pages(const struct folio *folio)
* page. compound_nr() can be called on a tail page, and is defined to
* return 1 in that case.
*/
static inline long compound_nr(struct page *page)
static inline long compound_nr(const struct page *page)
{
struct folio *folio = (struct folio *)page;
const struct folio *folio = (struct folio *)page;
if (!test_bit(PG_head, &folio->flags.f))
return 1;
@@ -3066,21 +3066,26 @@ static inline bool ptlock_init(struct ptdesc *ptdesc) { return true; }
static inline void ptlock_free(struct ptdesc *ptdesc) {}
#endif /* defined(CONFIG_SPLIT_PTE_PTLOCKS) */
static inline unsigned long ptdesc_nr_pages(const struct ptdesc *ptdesc)
{
return compound_nr(ptdesc_page(ptdesc));
}
static inline void __pagetable_ctor(struct ptdesc *ptdesc)
{
struct folio *folio = ptdesc_folio(ptdesc);
pg_data_t *pgdat = NODE_DATA(memdesc_nid(ptdesc->pt_flags));
__folio_set_pgtable(folio);
lruvec_stat_add_folio(folio, NR_PAGETABLE);
__SetPageTable(ptdesc_page(ptdesc));
mod_node_page_state(pgdat, NR_PAGETABLE, ptdesc_nr_pages(ptdesc));
}
static inline void pagetable_dtor(struct ptdesc *ptdesc)
{
struct folio *folio = ptdesc_folio(ptdesc);
pg_data_t *pgdat = NODE_DATA(memdesc_nid(ptdesc->pt_flags));
ptlock_free(ptdesc);
__folio_clear_pgtable(folio);
lruvec_stat_sub_folio(folio, NR_PAGETABLE);
__ClearPageTable(ptdesc_page(ptdesc));
mod_node_page_state(pgdat, NR_PAGETABLE, -ptdesc_nr_pages(ptdesc));
}
static inline void pagetable_dtor_free(struct ptdesc *ptdesc)