mm/swap: convert delete_from_swap_cache() to take a folio

All but one caller already has a folio, so convert it to use a folio.

Link: https://lkml.kernel.org/r/[e-mail]
Signed-off-by: Matthew Wilcox (Oracle) <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>

mm/memory-failure.c

···
 
 static int me_swapcache_clean(struct page_state *ps, struct page *p)
 {
+	struct folio *folio = page_folio(p);
 	int ret;
 
-	delete_from_swap_cache(p);
+	delete_from_swap_cache(folio);
 
 	ret = delete_from_lru_cache(p) ? MF_FAILED : MF_RECOVERED;
-	unlock_page(p);
+	folio_unlock(folio);
 
 	if (has_extra_refcount(ps, p, false))
 		ret = MF_FAILED;

mm/shmem.c

···
 		return;
 
 	folio_wait_writeback(folio);
-	delete_from_swap_cache(&folio->page);
+	delete_from_swap_cache(folio);
 	spin_lock_irq(&info->lock);
 	/*
 	 * Don't treat swapin error folio as alloced. Otherwise inode->i_blocks won't
···
 	if (sgp == SGP_WRITE)
 		folio_mark_accessed(folio);
 
-	delete_from_swap_cache(&folio->page);
+	delete_from_swap_cache(folio);
 	folio_mark_dirty(folio);
 	swap_free(swap);
 

mm/swap.h

···
 		      gfp_t gfp, void **shadowp);
 void __delete_from_swap_cache(struct page *page,
 			      swp_entry_t entry, void *shadow);
-void delete_from_swap_cache(struct page *page);
+void delete_from_swap_cache(struct folio *folio);
 void clear_shadow_from_swap_cache(int type, unsigned long begin,
 				  unsigned long end);
 void free_swap_cache(struct page *page);
···
 {
 }
 
-static inline void delete_from_swap_cache(struct page *page)
+static inline void delete_from_swap_cache(struct folio *folio)
 {
 }
 

mm/swap_state.c

···
 }
 
 /*
- * This must be called only on pages that have
+ * This must be called only on folios that have
  * been verified to be in the swap cache and locked.
- * It will never put the page into the free list,
- * the caller has a reference on the page.
+ * It will never put the folio into the free list,
+ * the caller has a reference on the folio.
  */
-void delete_from_swap_cache(struct page *page)
+void delete_from_swap_cache(struct folio *folio)
 {
-	swp_entry_t entry = { .val = page_private(page) };
+	swp_entry_t entry = folio_swap_entry(folio);
 	struct address_space *address_space = swap_address_space(entry);
 
 	xa_lock_irq(&address_space->i_pages);
-	__delete_from_swap_cache(page, entry, NULL);
+	__delete_from_swap_cache(&folio->page, entry, NULL);
 	xa_unlock_irq(&address_space->i_pages);
 
-	put_swap_page(page, entry);
-	page_ref_sub(page, thp_nr_pages(page));
+	put_swap_page(&folio->page, entry);
+	folio_ref_sub(folio, folio_nr_pages(folio));
 }
 
 void clear_shadow_from_swap_cache(int type, unsigned long begin,

mm/swapfile.c

···
 	if (pm_suspended_storage())
 		return 0;
 
-	delete_from_swap_cache(&folio->page);
+	delete_from_swap_cache(folio);
 	folio_set_dirty(folio);
 	return 1;
 }