summaryrefslogtreecommitdiffstats
path: root/include/linux/dax.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/linux/dax.h')
-rw-r--r--include/linux/dax.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/dax.h b/include/linux/dax.h
index deb0f663252f..450b28db9533 100644
--- a/include/linux/dax.h
+++ b/include/linux/dax.h
@@ -88,6 +88,8 @@ int dax_writeback_mapping_range(struct address_space *mapping,
struct block_device *bdev, struct writeback_control *wbc);
struct page *dax_layout_busy_page(struct address_space *mapping);
+bool dax_lock_mapping_entry(struct page *page);
+void dax_unlock_mapping_entry(struct page *page);
#else
static inline bool bdev_dax_supported(struct block_device *bdev,
int blocksize)
@@ -119,6 +121,17 @@ static inline int dax_writeback_mapping_range(struct address_space *mapping,
{
return -EOPNOTSUPP;
}
+
+static inline bool dax_lock_mapping_entry(struct page *page)
+{
+ if (IS_DAX(page->mapping->host))
+ return true;
+ return false;
+}
+
+static inline void dax_unlock_mapping_entry(struct page *page)
+{
+}
#endif
int dax_read_lock(void);