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-rw-r--r--mm/filemap.c12
1 files changed, 7 insertions, 5 deletions
diff --git a/mm/filemap.c b/mm/filemap.c
index 5c0c6518f341..734891d0663d 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -1488,13 +1488,15 @@ static void do_sync_mmap_readahead(struct vm_area_struct *vma,
if (ra->mmap_miss > MMAP_LOTSAMISS)
return;
+ /*
+ * mmap read-around
+ */
ra_pages = max_sane_readahead(ra->ra_pages);
if (ra_pages) {
- pgoff_t start = 0;
-
- if (offset > ra_pages / 2)
- start = offset - ra_pages / 2;
- do_page_cache_readahead(mapping, file, start, ra_pages);
+ ra->start = max_t(long, 0, offset - ra_pages/2);
+ ra->size = ra_pages;
+ ra->async_size = 0;
+ ra_submit(ra, mapping, file);
}
}