mm: Add three folio wrappers

folio_is_zone_device() is equivalent to is_zone_device_page(),
folio_is_device_private() is equivalent to is_device_private_page(),
and folio_is_pinnable() is equivalent to is_pinnable_page().

All of these tests return the same result for every page in the folio,
so we can just pass the head page of the folio to the page variant of
the function.

Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>

diff --git a/include/linux/memremap.h b/include/linux/memremap.h
index d6a114dd5ea8b74815277f31aca0de28cb5ed20e..8af304f6b504727a9f3c8a8de3e95d7313aa1cb4 100644 (file)
--- a/include/linux/memremap.h
+++ b/include/linux/memremap.h
@@ -138,6 +138,11 @@ static inline bool is_device_private_page(const struct page *page)
                page->pgmap->type == MEMORY_DEVICE_PRIVATE;
 }
 
+static inline bool folio_is_device_private(const struct folio *folio)
+{
+       return is_device_private_page(&folio->page);
+}
+
 static inline bool is_pci_p2pdma_page(const struct page *page)
 {
        return IS_ENABLED(CONFIG_PCI_P2PDMA) &&

diff --git a/include/linux/mm.h b/include/linux/mm.h
index 0d3f9057a807c83ce27c726c916b606ef92983e5..2ca10c167f35021a3f822d0a7bc7f98d654e9e79 100644 (file)
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1075,6 +1075,11 @@ static inline bool is_zone_device_page(const struct page *page)
 }
 #endif
 
+static inline bool folio_is_zone_device(const struct folio *folio)
+{
+       return is_zone_device_page(&folio->page);
+}
+
 static inline bool is_zone_movable_page(const struct page *page)
 {
        return page_zonenum(page) == ZONE_MOVABLE;
@@ -1556,6 +1561,11 @@ static inline bool is_pinnable_page(struct page *page)
 }
 #endif
 
+static inline bool folio_is_pinnable(struct folio *folio)
+{
+       return is_pinnable_page(&folio->page);
+}
+
 static inline void set_page_zone(struct page *page, enum zone_type zone)
 {
        page->flags &= ~(ZONES_MASK << ZONES_PGSHIFT);