linux-kernel - [PATCH 3/4] cpuset: use seq_*mask

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Date:	Sun, 12 Oct 2008 17:29:28 +0800
From:	Lai Jiangshan <laijs@...fujitsu.com>
To:	Andrew Morton <akpm@...ux-foundation.org>,
	Alexey Dobriyan <adobriyan@...il.com>,
	Paul Menage <menage@...gle.com>, Paul Jackson <pj@....com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: [PATCH 3/4] cpuset: use seq_*mask_* to print masks


1) seq_file excepts that m->count == m->size when it's buf is full,
   so current code will causes bugs when buf is overflow.

2) There is not too good that cpuset accesses struct seq_file's
   fields directly.

Signed-off-by: Lai Jiangshan <laijs@...fujitsu.com>
---
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index eab7bd6..684d21b 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2437,19 +2437,15 @@ const struct file_operations proc_cpuset_operations = {
 void cpuset_task_status_allowed(struct seq_file *m, struct task_struct *task)
 {
 	seq_printf(m, "Cpus_allowed:\t");
-	m->count += cpumask_scnprintf(m->buf + m->count, m->size - m->count,
-					task->cpus_allowed);
+	seq_cpumask(m, &task->cpus_allowed);
 	seq_printf(m, "\n");
 	seq_printf(m, "Cpus_allowed_list:\t");
-	m->count += cpulist_scnprintf(m->buf + m->count, m->size - m->count,
-					task->cpus_allowed);
+	seq_cpumask_list(m, &task->cpus_allowed);
 	seq_printf(m, "\n");
 	seq_printf(m, "Mems_allowed:\t");
-	m->count += nodemask_scnprintf(m->buf + m->count, m->size - m->count,
-					task->mems_allowed);
+	seq_nodemask(m, &task->mems_allowed);
 	seq_printf(m, "\n");
 	seq_printf(m, "Mems_allowed_list:\t");
-	m->count += nodelist_scnprintf(m->buf + m->count, m->size - m->count,
-					task->mems_allowed);
+	seq_nodemask_list(m, &task->mems_allowed);
 	seq_printf(m, "\n");
 }




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