diff --git a/configure.ac b/configure.ac
index 80fb39d..f101b86 100644
--- a/configure.ac
+++ b/configure.ac
@@ -265,6 +265,12 @@ if test "$enable_nfsv4" = yes; then
     AC_RPCSEC_VERSION
   fi
 fi
+
+if test "$enable_nfsv41" = yes; then
+  AC_CHECK_LIB([devmapper], [dm_task_create], [LIBDEVMAPPER="-ldevmapper"], AC_MSG_ERROR([libdevmapper needed]))
+  AC_CHECK_HEADER(libdevmapper.h, , AC_MSG_ERROR([Cannot find devmapper header file libdevmapper.h]))
+fi
+
 dnl enable nfsidmap when its support by libnfsidmap
 AM_CONDITIONAL(CONFIG_NFSIDMAP, [test "$ac_cv_header_keyutils_h$ac_cv_lib_nfsidmap_nfs4_owner_to_uid" = "yesyes"])
 
diff --git a/utils/blkmapd/device-process.c b/utils/blkmapd/device-process.c
index 27ff374..652a7a8 100644
--- a/utils/blkmapd/device-process.c
+++ b/utils/blkmapd/device-process.c
@@ -296,7 +296,7 @@ decode_blk_volume(uint32_t **pp, uint32_t *end, struct bl_volume *vols, int voln
 		off_t stripe_unit = vol->param.bv_stripe_unit;
 		/* Check limitations imposed by device-mapper */
 		if ((stripe_unit & (stripe_unit - 1)) != 0
-		    || stripe_unit < (off_t) (PAGE_SIZE >> 9))
+		    || stripe_unit < (off_t) (sysconf(_SC_PAGE_SIZE) >> 9))
 			return -EIO;
 		BLK_READBUF(p, end, 4);
 		READ32(vol->bv_vol_n);
diff --git a/utils/exportfs/exportfs.man b/utils/exportfs/exportfs.man
index 364f247..8853486 100644
--- a/utils/exportfs/exportfs.man
+++ b/utils/exportfs/exportfs.man
@@ -177,7 +177,7 @@ In this way
 .B exportfs
 can be used to modify the export options of an already exported directory.
 .SS Unexporting Directories
-The third synopsis shows how to unexported a currently exported directory.
+The third synopsis shows how to unexport a currently exported directory.
 When using
 .BR "exportfs -ua" ,
 all entries listed in
diff --git a/utils/exportfs/nfsd.man b/utils/exportfs/nfsd.man
index 7365a1b..47b73be 100644
--- a/utils/exportfs/nfsd.man
+++ b/utils/exportfs/nfsd.man
@@ -12,7 +12,7 @@ nfsd \- special filesystem for controlling Linux NFS server
 .SH DESCRIPTION
 The
 .B nfsd
-filesytem is a special filesystem which provides access to the Linux
+filesystem is a special filesystem which provides access to the Linux
 NFS server.  The filesystem consists of a single directory which
 contains a number of files.  These files are actually gateways into
 the NFS server.  Writing to them can affect the server.  Reading from
@@ -86,7 +86,7 @@ should be followed by a newline, with white-space separating the
 fields, and octal quoting of special characters.
 
 On writing this, the program will be able to read back a filehandle
-for that path as exported to the given client.  The filehandles length
+for that path as exported to the given client.  The filehandle's length
 will be at most the number of bytes given.
 
 The filehandle will be represented in hex with a leading '\ex'.
@@ -165,7 +165,7 @@ file.  The user-space program might then write
 .ti +5
 nfsd 127.0.0.1 1057206953 localhost
 .br
-to indicate that 127.0.0.1 should map to localhost, atleast for now.
+to indicate that 127.0.0.1 should map to localhost, at least for now.
 
 If the program uses select(2) or poll(2) to discover if it can read
 from the
diff --git a/utils/idmapd/idmapd.c b/utils/idmapd/idmapd.c
index 19d9114..e80efb4 100644
--- a/utils/idmapd/idmapd.c
+++ b/utils/idmapd/idmapd.c
@@ -778,8 +778,8 @@ nfsopen(struct idmap_client *ic)
 	} else {
 		event_set(&ic->ic_event, ic->ic_fd, EV_READ, nfscb, ic);
 		event_add(&ic->ic_event, NULL);
-		fcntl(ic->ic_dirfd, F_SETSIG, 0);
 		fcntl(ic->ic_dirfd, F_NOTIFY, 0);
+		fcntl(ic->ic_dirfd, F_SETSIG, 0);
 		if (verbose > 0)
 			xlog_warn("Opened %s", ic->ic_path);
 	}
diff --git a/utils/mount/nfs.man b/utils/mount/nfs.man
index ce40933..2ad92d1 100644
--- a/utils/mount/nfs.man
+++ b/utils/mount/nfs.man
@@ -1561,10 +1561,10 @@ To ensure that the saved mount options are not erased during a remount,
 specify either the local mount directory, or the server hostname and
 export pathname, but not both, during a remount.  For example,
 .P
-.NF
-.TA 2.5i
+.nf
+.ta 8n
 	mount -o remount,ro /mnt
-.FI
+.fi
 .P
 merges the mount option
 .B ro
diff --git a/utils/mount/stropts.c b/utils/mount/stropts.c
index 314a806..4032bf3 100644
--- a/utils/mount/stropts.c
+++ b/utils/mount/stropts.c
@@ -665,9 +665,10 @@ static int nfs_try_mount_v3v2(struct nfsmount_info *mi)
 		case EHOSTUNREACH:
 			continue;
 		default:
-			break;
+			goto out;
 		}
 	}
+out:
 	return ret;
 }
 
@@ -751,9 +752,10 @@ static int nfs_try_mount_v4(struct nfsmount_info *mi)
 		case EHOSTUNREACH:
 			continue;
 		default:
-			break;
+			goto out;
 		}
 	}
+out:
 	return ret;
 }
 
diff --git a/utils/nfsd/nfsd.man b/utils/nfsd/nfsd.man
index d8988d2..1cf9296 100644
--- a/utils/nfsd/nfsd.man
+++ b/utils/nfsd/nfsd.man
@@ -38,7 +38,7 @@ request on all known network addresses.  This may change in future
 releases of the Linux Kernel.
 .TP
 .B \-p " or " \-\-port  port
-specify a diferent port to listen on for NFS requests. By default,
+specify a different port to listen on for NFS requests. By default,
 .B rpc.nfsd
 will listen on port 2049.
 .TP