mm: Add folio_young and folio_idle

Idle page tracking is handled through page_ext on 32-bit architectures.
Add folio equivalents for 32-bit and move all the page compatibility
parts to common code.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: William Kucharski <william.kucharski@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: David Howells <dhowells@redhat.com>

diff --git a/include/linux/page_idle.h b/include/linux/page_idle.h
index d8a6aecf99cb9f0fc63bc49126b06fe5936d82e4..83abf95e9fa7ddb7f55708bc612ac6cef5d0cdf6 100644 (file)
--- a/include/linux/page_idle.h
+++ b/include/linux/page_idle.h
@@ -8,46 +8,16 @@
 
 #ifdef CONFIG_PAGE_IDLE_FLAG
 
-#ifdef CONFIG_64BIT
-static inline bool page_is_young(struct page *page)
-{
-       return PageYoung(page);
-}
-
-static inline void set_page_young(struct page *page)
-{
-       SetPageYoung(page);
-}
-
-static inline bool test_and_clear_page_young(struct page *page)
-{
-       return TestClearPageYoung(page);
-}
-
-static inline bool page_is_idle(struct page *page)
-{
-       return PageIdle(page);
-}
-
-static inline void set_page_idle(struct page *page)
-{
-       SetPageIdle(page);
-}
-
-static inline void clear_page_idle(struct page *page)
-{
-       ClearPageIdle(page);
-}
-#else /* !CONFIG_64BIT */
+#ifndef CONFIG_64BIT
 /*
  * If there is not enough space to store Idle and Young bits in page flags, use
  * page ext flags instead.
  */
 extern struct page_ext_operations page_idle_ops;
 
-static inline bool page_is_young(struct page *page)
+static inline bool folio_test_young(struct folio *folio)
 {
-       struct page_ext *page_ext = lookup_page_ext(page);
+       struct page_ext *page_ext = lookup_page_ext(&folio->page);
 
        if (unlikely(!page_ext))
                return false;
@@ -55,9 +25,9 @@ static inline bool page_is_young(struct page *page)
        return test_bit(PAGE_EXT_YOUNG, &page_ext->flags);
 }
 
-static inline void set_page_young(struct page *page)
+static inline void folio_set_young(struct folio *folio)
 {
-       struct page_ext *page_ext = lookup_page_ext(page);
+       struct page_ext *page_ext = lookup_page_ext(&folio->page);
 
        if (unlikely(!page_ext))
                return;
@@ -65,9 +35,9 @@ static inline void set_page_young(struct page *page)
        set_bit(PAGE_EXT_YOUNG, &page_ext->flags);
 }
 
-static inline bool test_and_clear_page_young(struct page *page)
+static inline bool folio_test_clear_young(struct folio *folio)
 {
-       struct page_ext *page_ext = lookup_page_ext(page);
+       struct page_ext *page_ext = lookup_page_ext(&folio->page);
 
        if (unlikely(!page_ext))
                return false;
@@ -75,9 +45,9 @@ static inline bool test_and_clear_page_young(struct page *page)
        return test_and_clear_bit(PAGE_EXT_YOUNG, &page_ext->flags);
 }
 
-static inline bool page_is_idle(struct page *page)
+static inline bool folio_test_idle(struct folio *folio)
 {
-       struct page_ext *page_ext = lookup_page_ext(page);
+       struct page_ext *page_ext = lookup_page_ext(&folio->page);
 
        if (unlikely(!page_ext))
                return false;
@@ -85,9 +55,9 @@ static inline bool page_is_idle(struct page *page)
        return test_bit(PAGE_EXT_IDLE, &page_ext->flags);
 }
 
-static inline void set_page_idle(struct page *page)
+static inline void folio_set_idle(struct folio *folio)
 {
-       struct page_ext *page_ext = lookup_page_ext(page);
+       struct page_ext *page_ext = lookup_page_ext(&folio->page);
 
        if (unlikely(!page_ext))
                return;
@@ -95,46 +65,75 @@ static inline void set_page_idle(struct page *page)
        set_bit(PAGE_EXT_IDLE, &page_ext->flags);
 }
 
-static inline void clear_page_idle(struct page *page)
+static inline void folio_clear_idle(struct folio *folio)
 {
-       struct page_ext *page_ext = lookup_page_ext(page);
+       struct page_ext *page_ext = lookup_page_ext(&folio->page);
 
        if (unlikely(!page_ext))
                return;
 
        clear_bit(PAGE_EXT_IDLE, &page_ext->flags);
 }
-#endif /* CONFIG_64BIT */
+#endif /* !CONFIG_64BIT */
 
 #else /* !CONFIG_PAGE_IDLE_FLAG */
 
-static inline bool page_is_young(struct page *page)
+static inline bool folio_test_young(struct folio *folio)
 {
        return false;
 }
 
-static inline void set_page_young(struct page *page)
+static inline void folio_set_young(struct folio *folio)
 {
 }
 
-static inline bool test_and_clear_page_young(struct page *page)
+static inline bool folio_test_clear_young(struct folio *folio)
 {
        return false;
 }
 
-static inline bool page_is_idle(struct page *page)
+static inline bool folio_test_idle(struct folio *folio)
 {
        return false;
 }
 
-static inline void set_page_idle(struct page *page)
+static inline void folio_set_idle(struct folio *folio)
 {
 }
 
-static inline void clear_page_idle(struct page *page)
+static inline void folio_clear_idle(struct folio *folio)
 {
 }
 
 #endif /* CONFIG_PAGE_IDLE_FLAG */
 
+static inline bool page_is_young(struct page *page)
+{
+       return folio_test_young(page_folio(page));
+}
+
+static inline void set_page_young(struct page *page)
+{
+       folio_set_young(page_folio(page));
+}
+
+static inline bool test_and_clear_page_young(struct page *page)
+{
+       return folio_test_clear_young(page_folio(page));
+}
+
+static inline bool page_is_idle(struct page *page)
+{
+       return folio_test_idle(page_folio(page));
+}
+
+static inline void set_page_idle(struct page *page)
+{
+       folio_set_idle(page_folio(page));
+}
+
+static inline void clear_page_idle(struct page *page)
+{
+       folio_clear_idle(page_folio(page));
+}
 #endif /* _LINUX_MM_PAGE_IDLE_H */