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Diffstat (limited to 'kernel')
-rw-r--r--kernel/cpuset.c27
1 files changed, 20 insertions, 7 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c
index b602f73fb38..3e991c0c02e 100644
--- a/kernel/cpuset.c
+++ b/kernel/cpuset.c
@@ -50,6 +50,7 @@
#include <linux/time.h>
#include <linux/backing-dev.h>
#include <linux/sort.h>
+#include <linux/task_ref.h>
#include <asm/uaccess.h>
#include <asm/atomic.h>
@@ -2442,31 +2443,43 @@ void __cpuset_memory_pressure_bump(void)
*/
static int proc_cpuset_show(struct seq_file *m, void *v)
{
+ struct task_ref *tref;
struct task_struct *tsk;
char *buf;
- int retval = 0;
+ int retval;
+ retval = -ENOMEM;
buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!buf)
- return -ENOMEM;
+ goto out;
+
+ retval = -ESRCH;
+ tref = m->private;
+ tsk = get_tref_task(tref);
+ if (!tsk)
+ goto out_free;
- tsk = m->private;
+ retval = -EINVAL;
mutex_lock(&manage_mutex);
+
retval = cpuset_path(tsk->cpuset, buf, PAGE_SIZE);
if (retval < 0)
- goto out;
+ goto out_unlock;
seq_puts(m, buf);
seq_putc(m, '\n');
-out:
+out_unlock:
mutex_unlock(&manage_mutex);
+ put_task_struct(tsk);
+out_free:
kfree(buf);
+out:
return retval;
}
static int cpuset_open(struct inode *inode, struct file *file)
{
- struct task_struct *tsk = PROC_I(inode)->task;
- return single_open(file, proc_cpuset_show, tsk);
+ struct task_ref *tref = PROC_I(inode)->tref;
+ return single_open(file, proc_cpuset_show, tref);
}
struct file_operations proc_cpuset_operations = {