Merge tag 'libnvdimm-for-4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdim...

[platform/kernel/linux-rpi.git] / include / linux / iomap.h

diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index ca10767..19a07de 100644 (file)
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -21,9 +21,13 @@ struct vm_fault;
 
 /*
  * Flags for all iomap mappings:
+ *
+ * IOMAP_F_DIRTY indicates the inode has uncommitted metadata needed to access
+ * written data and requires fdatasync to commit them to persistent storage.
  */
 #define IOMAP_F_NEW            0x01    /* blocks have been newly allocated */
 #define IOMAP_F_BOUNDARY       0x02    /* mapping ends at metadata boundary */
+#define IOMAP_F_DIRTY          0x04    /* uncommitted metadata */
 
 /*
  * Flags that only need to be reported for IOMAP_REPORT requests: