From: yangsheng <Sheng.Yang@Sun.COM>
Date: Tue, 6 Apr 2010 15:37:21 +0000 (+0800)
Subject: b=22385 Computing result of unsigned variable may < 0.
X-Git-Tag: 1.8.3~11
X-Git-Url: https://git.whamcloud.com/gitweb?a=commitdiff_plain;h=536e1116989e865b7e53a8d4a9b93dec3ae5b6ca;p=fs%2Flustre-release.git

b=22385 Computing result of unsigned variable may < 0.

i=johann
i=wangdi
---

diff --git a/lustre/llite/rw.c b/lustre/llite/rw.c
index 8c49a03..f42419e 100644
--- a/lustre/llite/rw.c
+++ b/lustre/llite/rw.c
@@ -1629,7 +1629,8 @@ static int ras_inside_ra_window(unsigned long idx, struct ra_io_arg *ria)
          * For stride I/O mode, just check whether the idx is inside
          * the ria_pages. */
         return ria->ria_length == 0 || ria->ria_length == ria->ria_pages ||
-               (idx - ria->ria_stoff) % ria->ria_length < ria->ria_pages;
+               (idx >= ria->ria_stoff && (idx - ria->ria_stoff) %
+                ria->ria_length < ria->ria_pages);
 }
 
 static int ll_read_ahead_pages(struct obd_export *exp,