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-rw-r--r--include/linux/iomap.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h
index 27048ec10e1c..5675af6b740c 100644
--- a/include/linux/iomap.h
+++ b/include/linux/iomap.h
@@ -53,6 +53,9 @@ struct vm_fault;
*
* IOMAP_F_XATTR indicates that the iomap is for an extended attribute extent
* rather than a file data extent.
+ *
+ * IOMAP_F_BOUNDARY indicates that I/O and I/O completions for this iomap must
+ * never be merged with the mapping before it.
*/
#define IOMAP_F_NEW (1U << 0)
#define IOMAP_F_DIRTY (1U << 1)
@@ -64,6 +67,7 @@ struct vm_fault;
#define IOMAP_F_BUFFER_HEAD 0
#endif /* CONFIG_BUFFER_HEAD */
#define IOMAP_F_XATTR (1U << 5)
+#define IOMAP_F_BOUNDARY (1U << 6)
/*
* Flags set by the core iomap code during operations: