diff options
| author | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-02-04 14:13:31 -0500 |
|---|---|---|
| committer | Matthew Wilcox (Oracle) <willy@infradead.org> | 2022-03-21 13:01:35 -0400 |
| commit | d4b4084ac3154c51ff5fa71f669264cc44429be2 (patch) | |
| tree | ac1e9f69bf20307b6e315ed70ca1b4aab3c50c0c /mm/huge_memory.c | |
| parent | e0cd5e7ffa549487cf1a85452f371274cbf0a8f1 (diff) | |
mm: Turn can_split_huge_page() into can_split_folio()
This function already required a head page to be passed, so this
just adds type-safety and removes a few implicit calls to
compound_head().
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Diffstat (limited to 'mm/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index d874d50e703b..38e233a7d977 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2516,18 +2516,19 @@ int page_trans_huge_mapcount(struct page *page) } /* Racy check whether the huge page can be split */ -bool can_split_huge_page(struct page *page, int *pextra_pins) +bool can_split_folio(struct folio *folio, int *pextra_pins) { int extra_pins; /* Additional pins from page cache */ - if (PageAnon(page)) - extra_pins = PageSwapCache(page) ? thp_nr_pages(page) : 0; + if (folio_test_anon(folio)) + extra_pins = folio_test_swapcache(folio) ? + folio_nr_pages(folio) : 0; else - extra_pins = thp_nr_pages(page); + extra_pins = folio_nr_pages(folio); if (pextra_pins) *pextra_pins = extra_pins; - return total_mapcount(page) == page_count(page) - extra_pins - 1; + return folio_mapcount(folio) == folio_ref_count(folio) - extra_pins - 1; } /* @@ -2619,7 +2620,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) * Racy check if we can split the page, before unmap_page() will * split PMDs */ - if (!can_split_huge_page(head, &extra_pins)) { + if (!can_split_folio(folio, &extra_pins)) { ret = -EBUSY; goto out_unlock; } @@ -2928,7 +2929,7 @@ static int split_huge_pages_pid(int pid, unsigned long vaddr_start, goto next; total++; - if (!can_split_huge_page(compound_head(page), NULL)) + if (!can_split_folio(page_folio(page), NULL)) goto next; if (!trylock_page(page)) |