gfs2: simplify gdlm_put_lock with out_free label

This patch introduces a new out_free label and consolidates the three
places function gdlm_put_lock freed the glock.  No change in
functionality.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>

fs/gfs2/lock_dlm.c

@@ -296,10 +296,8 @@ static void gdlm_put_lock(struct gfs2_glock *gl)
 	struct lm_lockstruct *ls = &sdp->sd_lockstruct;
 	int error;
 
-	if (gl->gl_lksb.sb_lkid == 0) {
-		gfs2_glock_free(gl);
-		return;
-	}
+	if (gl->gl_lksb.sb_lkid == 0)
+		goto out_free;
 
 	clear_bit(GLF_BLOCKING, &gl->gl_flags);
 	gfs2_glstats_inc(gl, GFS2_LKS_DCOUNT);
@@ -307,17 +305,13 @@ static void gdlm_put_lock(struct gfs2_glock *gl)
 	gfs2_update_request_times(gl);
 
 	/* don't want to call dlm if we've unmounted the lock protocol */
-	if (test_bit(DFL_UNMOUNT, &ls->ls_recover_flags)) {
-		gfs2_glock_free(gl);
-		return;
-	}
+	if (test_bit(DFL_UNMOUNT, &ls->ls_recover_flags))
+		goto out_free;
 	/* don't want to skip dlm_unlock writing the lvb when lock has one */
 
 	if (test_bit(SDF_SKIP_DLM_UNLOCK, &sdp->sd_flags) &&
-	    !gl->gl_lksb.sb_lvbptr) {
-		gfs2_glock_free(gl);
-		return;
-	}
+	    !gl->gl_lksb.sb_lvbptr)
+		goto out_free;
 
 again:
 	error = dlm_unlock(ls->ls_dlm, gl->gl_lksb.sb_lkid, DLM_LKF_VALBLK,
@@ -331,8 +325,11 @@ static void gdlm_put_lock(struct gfs2_glock *gl)
 		fs_err(sdp, "gdlm_unlock %x,%llx err=%d\n",
 		       gl->gl_name.ln_type,
 		       (unsigned long long)gl->gl_name.ln_number, error);
-		return;
 	}
+	return;
+
+out_free:
+	gfs2_glock_free(gl);
 }
 
 static void gdlm_cancel(struct gfs2_glock *gl)