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Diffstat (limited to 'fs/xfs/xfs_bmap.h')
-rw-r--r--fs/xfs/xfs_bmap.h9
1 files changed, 6 insertions, 3 deletions
diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
index b13569a6179b..71ec9b6ecdfc 100644
--- a/fs/xfs/xfs_bmap.h
+++ b/fs/xfs/xfs_bmap.h
@@ -74,9 +74,12 @@ typedef struct xfs_bmap_free
#define XFS_BMAPI_IGSTATE 0x080 /* Ignore state - */
/* combine contig. space */
#define XFS_BMAPI_CONTIG 0x100 /* must allocate only one extent */
-#define XFS_BMAPI_CONVERT 0x200 /* unwritten extent conversion - */
- /* need write cache flushing and no */
- /* additional allocation alignments */
+/*
+ * unwritten extent conversion - this needs write cache flushing and no additional
+ * allocation alignments. When specified with XFS_BMAPI_PREALLOC it converts
+ * from written to unwritten, otherwise convert from unwritten to written.
+ */
+#define XFS_BMAPI_CONVERT 0x200
#define XFS_BMAPI_FLAGS \
{ XFS_BMAPI_WRITE, "WRITE" }, \