Commit 06d20bdb authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle)
Browse files

mm: Add lru_to_folio() 



Since page->lru occupies the same bytes as compound_head, any page
on the LRU list must be a folio.

Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
parent 3ecb0087

include/linux/mm.h

+4 −0
Original line number Diff line number Diff line
@@ -225,6 +225,10 @@ int overcommit_policy_handler(struct ctl_table *, int, void *, size_t *, 
#define PAGE_ALIGNED(addr)	IS_ALIGNED((unsigned long)(addr), PAGE_SIZE)



#define lru_to_page(head) (list_entry((head)->prev, struct page, lru))

static inline struct folio *lru_to_folio(struct list_head *head)

{

	return list_entry((head)->prev, struct folio, lru);

}



void setup_initial_init_mm(void *start_code, void *end_code,

			   void *end_data, void *brk);