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@cn.fujitsu.com>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Paul Menage <menage@google.com>
Cc: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index 81d4d2426fd479c625bf749ed293a2c834a97f15..3e00526f52ec14d56eb89ee1ab5c1a40fbed1331 100644 (file)
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -2436,19 +2436,15 @@ 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");
 }