From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f178.google.com (mail-wi0-f178.google.com [209.85.212.178]) by kanga.kvack.org (Postfix) with ESMTP id C79BA6B0039 for ; Fri, 29 Aug 2014 12:07:14 -0400 (EDT) Received: by mail-wi0-f178.google.com with SMTP id r20so2788718wiv.11 for ; Fri, 29 Aug 2014 09:07:14 -0700 (PDT) Received: from ducie-dc1.codethink.co.uk (ducie-dc1.codethink.co.uk. [185.25.241.215]) by mx.google.com with ESMTPS id pm5si646858wjc.146.2014.08.29.09.07.13 for (version=TLSv1.1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Fri, 29 Aug 2014 09:07:13 -0700 (PDT) From: Rob Jones Subject: [PATCH 3/4] mm: Use __seq_open_private() instead of seq_open() Date: Fri, 29 Aug 2014 17:06:39 +0100 Message-Id: <1409328400-18212-4-git-send-email-rob.jones@codethink.co.uk> In-Reply-To: <1409328400-18212-1-git-send-email-rob.jones@codethink.co.uk> References: <1409328400-18212-1-git-send-email-rob.jones@codethink.co.uk> Sender: owner-linux-mm@kvack.org List-ID: To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, jbaron@akamai.com, cl@linux-foundation.org, penberg@kernel.org, mpm@selenic.com, akpm@linux-foundation.org, linux-kernel@codethink.co.uk, rob.jones@codethink.co.uk Using __seq_open_private() removes boilerplate code from slabstats_open() The resultant code is shorter and easier to follow. This patch does not change any functionality. Signed-off-by: Rob Jones --- mm/slab.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/mm/slab.c b/mm/slab.c index 19d9218..d67f319 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -4339,19 +4339,15 @@ static const struct seq_operations slabstats_op = { static int slabstats_open(struct inode *inode, struct file *file) { - unsigned long *n = kzalloc(PAGE_SIZE, GFP_KERNEL); - int ret = -ENOMEM; - if (n) { - ret = seq_open(file, &slabstats_op); - if (!ret) { - struct seq_file *m = file->private_data; - *n = PAGE_SIZE / (2 * sizeof(unsigned long)); - m->private = n; - n = NULL; - } - kfree(n); - } - return ret; + unsigned long *n; + + n = __seq_open_private(file, &slabstats_op, PAGE_SIZE); + if (!n) + return -ENOMEM; + + *n = PAGE_SIZE / (2 * sizeof(unsigned long)); + + return 0; } static const struct file_operations proc_slabstats_operations = { -- 1.7.10.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org