Commit 39a5201a authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4/pnfs: Fix barriers in nfs4_mark_deviceid_unavailable() 



Fix the memory barriers in nfs4_mark_deviceid_unavailable() and
nfs4_test_deviceid_unavailable().

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 762bb7e9

fs/nfs/pnfs_dev.c

+3 −0
Original line number Diff line number Diff line
@@ -287,7 +287,9 @@ void 
nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node)

{

	node->timestamp_unavailable = jiffies;

	smp_mb__before_atomic();

	set_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);

	smp_mb__after_atomic();

}

EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_unavailable);
@@ -302,6 +304,7 @@ nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node) 
		if (time_in_range(node->timestamp_unavailable, start, end))

			return true;

		clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);

		smp_mb__after_atomic();

	}

	return false;

}