diff options
Diffstat (limited to 'kernel/cpuset.c')
| -rw-r--r-- | kernel/cpuset.c | 27 |
1 files changed, 20 insertions, 7 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index b602f73fb38d..3e991c0c02e2 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 = { |