From patchwork Mon Sep 30 08:53:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13815650 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4E80C17DFEB; Mon, 30 Sep 2024 08:56:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727686574; cv=none; b=YkRTRKQl5zu3Xssk4OlAqHhWQunn/tdISCZH+ybx5AD8d+Gvnn1BGvcb+9xcpklbQg9AyDcuz0OwIMuP2vV2CX5Z/tnq+KeGtdb1fpXw3ri0Pufl0S829qUOpFypShyy8ROFgUZLQ2wDtdLewHV2uuF+JqTLiQZFEPb/jjhiGv8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727686574; c=relaxed/simple; bh=og/ZpgLgLs3C+isRBPNaeHdFYY+98m7ego/AVEB96tk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=sgr6yXHBkR+gDlP9RFEwAzfBjNS9+/U43m8ACh0mlA7PyS3E063PI8BGccyp8BVRC51lptrMO3g5yVyuBuqyPbDI4V3w4H2Ig0S+t6GVqvtAfxco3iWdTfbZmQ60PGujbwttQ5xx14iLItURcWQqe83iMH5prpnkQjvtwRVxuiA= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4XHFKP0KQgz4f3nV8; Mon, 30 Sep 2024 16:55:53 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 37C981A092F; Mon, 30 Sep 2024 16:56:10 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgCn28emZ_pmgEUMCw--.63034S8; Mon, 30 Sep 2024 16:56:10 +0800 (CST) From: Yu Kuai To: axboe@kernel.dk, tj@kernel.org, josef@toxicpanda.com Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, yukuai3@huawei.com, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH 4/5] blk-iolatency: use new helper blkg_print_dev_name() Date: Mon, 30 Sep 2024 16:53:01 +0800 Message-Id: <20240930085302.1558217-5-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240930085302.1558217-1-yukuai1@huaweicloud.com> References: <20240930085302.1558217-1-yukuai1@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: gCh0CgCn28emZ_pmgEUMCw--.63034S8 X-Coremail-Antispam: 1UD129KBjvdXoWrZF1rCw48AF1rJr1rJr1xAFb_yoWfKwbE9F Z7Z3ZIvr93WF4YvFWkCF1fXry0kr1kXF1xWayxA34DZF4FqFWkAFZrArs09F4aqF4xK345 AF98ur4fJr1IqjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbv8FF20E14v26rWj6s0DM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28IrcIa0xkI8VA2jI8067AKxVWUAVCq3wA2048vs2 IY020Ec7CjxVAFwI0_Xr0E3s1l8cAvFVAK0II2c7xJM28CjxkF64kEwVA0rcxSw2x7M28E F7xvwVC0I7IYx2IY67AKxVW7JVWDJwA2z4x0Y4vE2Ix0cI8IcVCY1x0267AKxVW8Jr0_Cr 1UM28EF7xvwVC2z280aVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv6xkF7I0E14v26rxl6s0D M2AIxVAIcxkEcVAq07x20xvEncxIr21l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjx v20xvE14v26r1j6r18McIj6I8E87Iv67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1l F7xvr2IYc2Ij64vIr41lF7I21c0EjII2zVCS5cI20VAGYxC7M4IIrI8v6xkF7I0E8cxan2 IY04v7MxkF7I0En4kS14v26r1q6r43MxAIw28IcxkI7VAKI48JMxC20s026xCaFVCjc4AY 6r1j6r4UMI8I3I0E5I8CrVAFwI0_Jr0_Jr4lx2IqxVCjr7xvwVAFwI0_JrI_JrWlx4CE17 CEb7AF67AKxVWUtVW8ZwCIc40Y0x0EwIxGrwCI42IY6xIIjxv20xvE14v26r1j6r1xMIIF 0xvE2Ix0cI8IcVCY1x0267AKxVW8JVWxJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIx AIcVC2z280aVAFwI0_Jr0_Gr1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2 KfnxnUUI43ZEXa7VUbPC7UUUUUU== X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ From: Yu Kuai To avoid abuse of bdi_dev_name(). Signed-off-by: Yu Kuai --- block/blk-iolatency.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/block/blk-iolatency.c b/block/blk-iolatency.c index ebb522788d97..9c9ab4a73e0b 100644 --- a/block/blk-iolatency.c +++ b/block/blk-iolatency.c @@ -898,12 +898,15 @@ static u64 iolatency_prfill_limit(struct seq_file *sf, struct blkg_policy_data *pd, int off) { struct iolatency_grp *iolat = pd_to_lat(pd); - const char *dname = blkg_dev_name(pd->blkg); - if (!dname || !iolat->min_lat_nsec) + if (!iolat->min_lat_nsec) return 0; - seq_printf(sf, "%s target=%llu\n", - dname, div_u64(iolat->min_lat_nsec, NSEC_PER_USEC)); + + if (!blkg_print_dev_name(sf, pd->blkg)) + return 0; + + seq_printf(sf, " target=%llu\n", + div_u64(iolat->min_lat_nsec, NSEC_PER_USEC)); return 0; }