From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from 22.17.110.36.static.bjtelecom.net ([36.110.17.22]:7731 "EHLO BJEXMBX011.didichuxing.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S965006AbeAJPSt (ORCPT ); Wed, 10 Jan 2018 10:18:49 -0500 Date: Wed, 10 Jan 2018 23:18:28 +0800 From: weiping zhang To: , CC: Subject: [PATCH] bdi: show error log when fail to create bdi debugfs entry Message-ID: <20180110151822.GA19852@localhost.didichuxing.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org bdi debugfs dir/file may create fail, add error log here. Signed-off-by: weiping zhang --- mm/backing-dev.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/backing-dev.c b/mm/backing-dev.c index b5f940c..9117c21 100644 --- a/mm/backing-dev.c +++ b/mm/backing-dev.c @@ -885,7 +885,8 @@ int bdi_register_va(struct backing_dev_info *bdi, const char *fmt, va_list args) cgwb_bdi_register(bdi); bdi->dev = dev; - bdi_debug_register(bdi, dev_name(dev)); + if (bdi_debug_register(bdi, dev_name(dev))) + pr_warn("blkdev %s create bdi debugfs failed\n", dev_name(dev)); set_bit(WB_registered, &bdi->wb.state); spin_lock_bh(&bdi_lock); -- 2.9.4