diff options
Diffstat (limited to 'include/linux/iomap.h')
| -rw-r--r-- | include/linux/iomap.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/iomap.h b/include/linux/iomap.h index b8d3b658ad2b..49d93f538785 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -309,6 +309,13 @@ struct iomap_writeback_ops { /* * Required, maps the blocks so that writeback can be performed on * the range starting at offset. + * + * Can return arbitrarily large regions, but we need to call into it at + * least once per folio to allow the file systems to synchronize with + * the write path that could be invalidating mappings. + * + * An existing mapping from a previous call to this method can be reused + * by the file system if it is still valid. */ int (*map_blocks)(struct iomap_writepage_ctx *wpc, struct inode *inode, loff_t offset); |