[PATCH][BUG 10227] readahead ret value fix

[Dave Young]

If the page_offset > end_index, the return value should be updated to 0,
avoiding the redundant read_pages

Signed-off-by: Dave Young <hidave.darkstar@xxxxxxxxx>

---
mm/readahead.c |    4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff -upr linux/mm/readahead.c linux.new/mm/readahead.c
--- linux/mm/readahead.c	2008-03-14 18:38:12.000000000 +0800
+++ linux.new/mm/readahead.c	2008-03-14 18:38:58.000000000 +0800
@@ -144,8 +144,10 @@ __do_page_cache_readahead(struct address
 	for (page_idx = 0; page_idx < nr_to_read; page_idx++) {
 		pgoff_t page_offset = offset + page_idx;
 
-		if (page_offset > end_index)
+		if (page_offset > end_index) {
+			ret = 0;
 			break;
+		}
 
 		rcu_read_lock();
 		page = radix_tree_lookup(&mapping->page_tree, page_offset);
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/