linux-kernel - [RFC 2/5] ia64/sn/hwperf: use seq_open

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Message-Id: <20180301233724.20440-2-linux@rasmusvillemoes.dk>
Date:   Fri,  2 Mar 2018 00:37:21 +0100
From:   Rasmus Villemoes <linux@...musvillemoes.dk>
To:     Tony Luck <tony.luck@...el.com>, Fenghua Yu <fenghua.yu@...el.com>
Cc:     Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC 2/5] ia64/sn/hwperf: use seq_open_data

This code should check the return value of seq_open(); if it failed,
file->private_data is NULL. But we can avoid the issue entirely and
simplify the code by letting seq_open_data() set the ->private member
to objbuf.

Signed-off-by: Rasmus Villemoes <linux@...musvillemoes.dk>
---
 arch/ia64/sn/kernel/sn2/sn_hwperf.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/ia64/sn/kernel/sn2/sn_hwperf.c b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
index 55febd65911a..fba7f3ad99f4 100644
--- a/arch/ia64/sn/kernel/sn2/sn_hwperf.c
+++ b/arch/ia64/sn/kernel/sn2/sn_hwperf.c
@@ -941,14 +941,11 @@ static int sn_hwperf_init(void)
 int sn_topology_open(struct inode *inode, struct file *file)
 {
 	int e;
-	struct seq_file *seq;
 	struct sn_hwperf_object_info *objbuf;
 	int nobj;
 
 	if ((e = sn_hwperf_enum_objects(&nobj, &objbuf)) == 0) {
-		e = seq_open(file, &sn_topology_seq_ops);
-		seq = file->private_data;
-		seq->private = objbuf;
+		e = seq_open_data(file, &sn_topology_seq_ops, objbuf);
 	}
 
 	return e;
-- 
2.15.1