sched/proc: Print accurate cpumask vs migrate_disable()

Ensure /proc/*/status doesn't print 'random' cpumasks due to
migrate_disable().

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Reviewed-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Link: https://lkml.kernel.org/r/20201023102347.593984734@infradead.org

diff --git a/fs/proc/array.c b/fs/proc/array.c
index 65ec202..7052441 100644 (file)
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -382,9 +382,9 @@ static inline void task_context_switch_counts(struct seq_file *m,
 static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
 {
        seq_printf(m, "Cpus_allowed:\t%*pb\n",
-                  cpumask_pr_args(task->cpus_ptr));
+                  cpumask_pr_args(&task->cpus_mask));
        seq_printf(m, "Cpus_allowed_list:\t%*pbl\n",
-                  cpumask_pr_args(task->cpus_ptr));
+                  cpumask_pr_args(&task->cpus_mask));
 }
 
 static inline void task_core_dumping(struct seq_file *m, struct mm_struct *mm)