mm: Turn deactivate_file_page() into deactivate_file_folio()

This function has one caller which already has a reference to the
page, so we don't need to use get_page_unless_zero().  Also move the
prototype to mm/internal.h.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/mm/internal.h b/mm/internal.h
index 9c1959fff477..7c441f43ba31 100644
--- a/mm/internal.h
+++ b/mm/internal.h
@@ -66,6 +66,7 @@ static inline void wake_throttle_isolated(pg_data_t *pgdat)
 vm_fault_t do_swap_page(struct vm_fault *vmf);
 void folio_rotate_reclaimable(struct folio *folio);
 bool __folio_end_writeback(struct folio *folio);
+void deactivate_file_folio(struct folio *folio);
 
 void free_pgtables(struct mmu_gather *tlb, struct vm_area_struct *start_vma,
 		unsigned long floor, unsigned long ceiling);