1 files changed, 40 insertions, 20 deletions

diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index d87840acbfb2..351c3b7f93a1 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -203,6 +203,7 @@ enum mapping_flags {
 	/* writeback related tags are not used */
 	AS_NO_WRITEBACK_TAGS = 5,
 	AS_LARGE_FOLIO_SUPPORT = 6,
+	AS_RELEASE_ALWAYS,	/* Call ->release_folio(), even if no private data */
 };
 
 /**
@@ -273,6 +274,21 @@ static inline int mapping_use_writeback_tags(struct address_space *mapping)
 	return !test_bit(AS_NO_WRITEBACK_TAGS, &mapping->flags);
 }
 
+static inline bool mapping_release_always(const struct address_space *mapping)
+{
+	return test_bit(AS_RELEASE_ALWAYS, &mapping->flags);
+}
+
+static inline void mapping_set_release_always(struct address_space *mapping)
+{
+	set_bit(AS_RELEASE_ALWAYS, &mapping->flags);
+}
+
+static inline void mapping_clear_release_always(struct address_space *mapping)
+{
+	clear_bit(AS_RELEASE_ALWAYS, &mapping->flags);
+}
+
 static inline gfp_t mapping_gfp_mask(struct address_space * mapping)
 {
 	return mapping->gfp_mask;
@@ -373,23 +389,31 @@ static inline struct address_space *folio_file_mapping(struct folio *folio)
 	return folio->mapping;
 }
 
-static inline struct address_space *page_file_mapping(struct page *page)
-{
-	return folio_file_mapping(page_folio(page));
-}
-
-/*
- * For file cache pages, return the address_space, otherwise return NULL
+/**
+ * folio_flush_mapping - Find the file mapping this folio belongs to.
+ * @folio: The folio.
+ *
+ * For folios which are in the page cache, return the mapping that this
+ * page belongs to.  Anonymous folios return NULL, even if they're in
+ * the swap cache.  Other kinds of folio also return NULL.
+ *
+ * This is ONLY used by architecture cache flushing code.  If you aren't
+ * writing cache flushing code, you want either folio_mapping() or
+ * folio_file_mapping().
  */
-static inline struct address_space *page_mapping_file(struct page *page)
+static inline struct address_space *folio_flush_mapping(struct folio *folio)
 {
-	struct folio *folio = page_folio(page);
-
 	if (unlikely(folio_test_swapcache(folio)))
 		return NULL;
+
 	return folio_mapping(folio);
 }
 
+static inline struct address_space *page_file_mapping(struct page *page)
+{
+	return folio_file_mapping(page_folio(page));
+}
+
 /**
  * folio_inode - Get the host inode for this folio.
  * @folio: The folio.
@@ -960,8 +984,7 @@ static inline bool wake_page_match(struct wait_page_queue *wait_page,
 
 void __folio_lock(struct folio *folio);
 int __folio_lock_killable(struct folio *folio);
-bool __folio_lock_or_retry(struct folio *folio, struct mm_struct *mm,
-				unsigned int flags);
+vm_fault_t __folio_lock_or_retry(struct folio *folio, struct vm_fault *vmf);
 void unlock_page(struct page *page);
 void folio_unlock(struct folio *folio);
 
@@ -1065,11 +1088,13 @@ static inline int folio_lock_killable(struct folio *folio)
  * Return value and mmap_lock implications depend on flags; see
  * __folio_lock_or_retry().
  */
-static inline bool folio_lock_or_retry(struct folio *folio,
-		struct mm_struct *mm, unsigned int flags)
+static inline vm_fault_t folio_lock_or_retry(struct folio *folio,
+					     struct vm_fault *vmf)
 {
 	might_sleep();
-	return folio_trylock(folio) || __folio_lock_or_retry(folio, mm, flags);
+	if (!folio_trylock(folio))
+		return __folio_lock_or_retry(folio, vmf);
+	return 0;
 }
 
 /*
@@ -1104,11 +1129,6 @@ static inline void wait_on_page_locked(struct page *page)
 	folio_wait_locked(page_folio(page));
 }
 
-static inline int wait_on_page_locked_killable(struct page *page)
-{
-	return folio_wait_locked_killable(page_folio(page));
-}
-
 void wait_on_page_writeback(struct page *page);
 void folio_wait_writeback(struct folio *folio);
 int folio_wait_writeback_killable(struct folio *folio);