readahead: apply max_sane_readahead() limit in ondemand_readahead()
Just in case someone aggressively sets a huge readahead size.
Cc: Nick Piggin <npiggin@suse.de>
Signed-off-by: Wu Fengguang <fengguang.wu@intel.com>
Cc: Ying Han <yinghan@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/readahead.c b/mm/readahead.c
index a224182..bd0f0e8 100644
--- a/mm/readahead.c
+++ b/mm/readahead.c
@@ -357,7 +357,7 @@
bool hit_readahead_marker, pgoff_t offset,
unsigned long req_size)
{
- int max = ra->ra_pages; /* max readahead pages */
+ unsigned long max = max_sane_readahead(ra->ra_pages);
pgoff_t prev_offset;
int sequential;