Merge branch 'for-linus-3.4' of git://git.linaro.org/people/sumitsemwal/linux-dma-buf

[~andy/linux] / drivers / md / dm-bufio.h

diff --git a/drivers/md/dm-bufio.h b/drivers/md/dm-bufio.h
index 5c4c3a04e3810d76fc9b65277a99a3479cd3e23a..b142946a9e32ea23dcc241b5120ba00fe09e5287 100644 (file)
--- a/drivers/md/dm-bufio.h
+++ b/drivers/md/dm-bufio.h
@@ -62,6 +62,14 @@ void *dm_bufio_get(struct dm_bufio_client *c, sector_t block,
 void *dm_bufio_new(struct dm_bufio_client *c, sector_t block,
                   struct dm_buffer **bp);
 
+/*
+ * Prefetch the specified blocks to the cache.
+ * The function starts to read the blocks and returns without waiting for
+ * I/O to finish.
+ */
+void dm_bufio_prefetch(struct dm_bufio_client *c,
+                      sector_t block, unsigned n_blocks);
+
 /*
  * Release a reference obtained with dm_bufio_{read,get,new}. The data
  * pointer and dm_buffer pointer is no longer valid after this call.