/proc/mounts may have more than one entry for /.  Use the last one.

Index: libfs/fssubs.c
===================================================================
RCS file: /cvsroot/jfs/jfsutils/libfs/fssubs.c,v
retrieving revision 1.21
diff -u -p -r1.21 fssubs.c
--- libfs/fssubs.c	17 Sep 2005 04:55:21 -0000	1.21
+++ libfs/fssubs.c	18 Oct 2005 13:15:53 -0000
@@ -113,10 +113,16 @@ int Is_Device_Mounted(char *Device_Name)
 
 	/* Attempt to find specified device name in mount records */
 	while ((Mount_Data = getmntent(Mount_Records)) != NULL) {
-		/* save root file system type for later, if needed */
-		if ((strcmp(ROOT_DIR, Mount_Data->mnt_dir) == 0) &&
-		    (strcmp("jfs", Mount_Data->mnt_type) != 0))
-			root_not_jfs = 1;
+		/*
+		 * There may be more than one entry for /.  Trust the
+		 * latest one
+		 */
+		if (strcmp(ROOT_DIR, Mount_Data->mnt_dir) == 0) {
+			if (strcmp("jfs", Mount_Data->mnt_type) == 0)
+				root_not_jfs = 0;
+			else
+				root_not_jfs = 1;
+		}
 		if (strcmp(Device_Name, Mount_Data->mnt_fsname) == 0)
 			break;
 	}