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-rw-r--r--mm/readahead.c12
1 files changed, 0 insertions, 12 deletions
diff --git a/mm/readahead.c b/mm/readahead.c
index 77506a2..cbddc3e 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -554,17 +554,5 @@ page_cache_async_readahead(struct address_space *mapping,
/* do read-ahead */
ondemand_readahead(mapping, ra, filp, true, offset, req_size);
-
-#ifdef CONFIG_BLOCK
- /*
- * Normally the current page is !uptodate and lock_page() will be
- * immediately called to implicitly unplug the device. However this
- * is not always true for RAID conifgurations, where data arrives
- * not strictly in their submission order. In this case we need to
- * explicitly kick off the IO.
- */
- if (PageUptodate(page))
- blk_run_backing_dev(mapping->backing_dev_info, NULL);
-#endif
}
EXPORT_SYMBOL_GPL(page_cache_async_readahead);
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