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rcu-tasks: Correct comparisons for CPU numbers in show_stalled_task_trace 

Valid CPU numbers can be zero or greater, but the checks for
->trc_ipi_to_cpu and tick_nohz_full_cpu()'s argument are for strictly
greater than.  This commit therefore corrects the check for no_hz_full
cpu in show_stalled_task_trace() so as to include cpu 0.

Signed-off-by: Neeraj Upadhyay <neeraju@codeaurora.org>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Neeraj Upadhyay 2021-08-18 12:58:41 +05:30 committed by Paul E. McKenney
parent 89401176da
commit d39ec8f3c1
1 changed files with 2 additions and 2 deletions
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4
kernel/rcu/tasks.h
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@ -1084,9 +1084,9 @@ static void show_stalled_task_trace(struct task_struct *t, bool *firstreport)
cpu = task_cpu(t);
pr_alert("P%d: %c%c%c nesting: %d%c cpu: %d\n",
t->pid,
".I"[READ_ONCE(t->trc_ipi_to_cpu) > 0],
".I"[READ_ONCE(t->trc_ipi_to_cpu) >= 0],
".i"[is_idle_task(t)],
".N"[cpu > 0 && tick_nohz_full_cpu(cpu)],
".N"[cpu >= 0 && tick_nohz_full_cpu(cpu)],
READ_ONCE(t->trc_reader_nesting),
" N"[!!READ_ONCE(t->trc_reader_special.b.need_qs)],
cpu);