diff options
| -rw-r--r-- | kernel/cpuset.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/kernel/cpuset.c b/kernel/cpuset.c index 38f18b33de6c..bc4131141230 100644 --- a/kernel/cpuset.c +++ b/kernel/cpuset.c @@ -2023,7 +2023,7 @@ void cpuset_fork(struct task_struct *child) * because tsk is already marked PF_EXITING, so attach_task() won't * mess with it, or task is a failed fork, never visible to attach_task. * - * Hack: + * the_top_cpuset_hack: * * Set the exiting tasks cpuset to the root cpuset (top_cpuset). * @@ -2062,7 +2062,7 @@ void cpuset_exit(struct task_struct *tsk) struct cpuset *cs; cs = tsk->cpuset; - tsk->cpuset = &top_cpuset; /* Hack - see comment above */ + tsk->cpuset = &top_cpuset; /* the_top_cpuset_hack - see above */ if (notify_on_release(cs)) { char *pathbuf = NULL; @@ -2373,12 +2373,12 @@ void __cpuset_memory_pressure_bump(void) * - No need to task_lock(tsk) on this tsk->cpuset reference, as it * doesn't really matter if tsk->cpuset changes after we read it, * and we take manage_mutex, keeping attach_task() from changing it - * anyway. + * anyway. No need to check that tsk->cpuset != NULL, thanks to + * the_top_cpuset_hack in cpuset_exit(), which sets an exiting tasks + * cpuset to top_cpuset. */ - static int proc_cpuset_show(struct seq_file *m, void *v) { - struct cpuset *cs; struct task_struct *tsk; char *buf; int retval = 0; @@ -2389,13 +2389,7 @@ static int proc_cpuset_show(struct seq_file *m, void *v) tsk = m->private; mutex_lock(&manage_mutex); - cs = tsk->cpuset; - if (!cs) { - retval = -EINVAL; - goto out; - } - - retval = cpuset_path(cs, buf, PAGE_SIZE); + retval = cpuset_path(tsk->cpuset, buf, PAGE_SIZE); if (retval < 0) goto out; seq_puts(m, buf); |