From 37b7b70ead5535020ffc22b5c21ec5622134ac9e Mon Sep 17 00:00:00 2001
From: Trond Myklebust <Trond.Myklebust@netapp.com>
Date: Tue, 2 Oct 2012 16:56:49 -0700
Subject: [PATCH] --- yaml --- r: 333213 b: refs/heads/master c:
 25a1a6211dd2fcbf0e45a07030703e2a42d7aa87 h: refs/heads/master i:   333211:
 50ff7d69266e9b60bdd0ca65d42be5dcee57c150 v: v3

---
 [refs]              |  2 +-
 trunk/fs/nfs/pnfs.c | 11 +++++++----
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/[refs] b/[refs]
index 52c3404655c5..7cee442e9e3a 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 5a65503f3dbdb4aa1cd6cb58c479c015d093292b
+refs/heads/master: 25a1a6211dd2fcbf0e45a07030703e2a42d7aa87
diff --git a/trunk/fs/nfs/pnfs.c b/trunk/fs/nfs/pnfs.c
index f1387e87513f..de827251bdac 100644
--- a/trunk/fs/nfs/pnfs.c
+++ b/trunk/fs/nfs/pnfs.c
@@ -572,7 +572,7 @@ pnfs_set_layout_stateid(struct pnfs_layout_hdr *lo, const nfs4_stateid *new,
 		if (update_barrier) {
 			u32 new_barrier = be32_to_cpu(new->seqid);
 
-			if ((int)(new_barrier - lo->plh_barrier))
+			if (pnfs_seqid_is_newer(new_barrier, lo->plh_barrier))
 				lo->plh_barrier = new_barrier;
 		} else {
 			/* Because of wraparound, we want to keep the barrier
@@ -593,9 +593,12 @@ static bool
 pnfs_layoutgets_blocked(struct pnfs_layout_hdr *lo, nfs4_stateid *stateid,
 			int lget)
 {
-	if ((stateid) &&
-	    (int)(lo->plh_barrier - be32_to_cpu(stateid->seqid)) >= 0)
-		return true;
+	if (stateid != NULL) {
+		u32 seqid = be32_to_cpu(stateid->seqid);
+
+		if (!pnfs_seqid_is_newer(seqid, lo->plh_barrier))
+			return true;
+	}
 	return lo->plh_block_lgets ||
 		test_bit(NFS_LAYOUT_BULK_RECALL, &lo->plh_flags) ||
 		(list_empty(&lo->plh_segs) &&