The following commit has been merged into the sched/urgent branch of tip:

Commit-ID: 3ebb1b6522392f64902b4e96954e35927354aa27 Gitweb: https://git.kernel.org/tip/3ebb1b6522392f64902b4e96954e35927354aa27 Author: Thomas Weißschuh thomas.weissschuh@linutronix.de AuthorDate: Thu, 26 Jun 2025 11:23:44 +02:00 Committer: Peter Zijlstra peterz@infradead.org CommitterDate: Tue, 01 Jul 2025 15:02:02 +02:00

sched: Fix preemption string of preempt_dynamic_none

Zero is a valid value for "preempt_dynamic_mode", namely "preempt_dynamic_none".

Fix the off-by-one in preempt_model_str(), so that "preempty_dynamic_none" is correctly formatted as PREEMPT(none) instead of PREEMPT(undef).

Fixes: 8bdc5daaa01e ("sched: Add a generic function to return the preemption string") Signed-off-by: Thomas Weißschuh thomas.weissschuh@linutronix.de Signed-off-by: Peter Zijlstra (Intel) peterz@infradead.org Reviewed-by: Sebastian Andrzej Siewior bigeasy@linutronix.de Tested-by: Shrikanth Hegde sshegde@linux.ibm.com Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20250626-preempt-str-none-v2-1-526213b70a89@linutr... --- kernel/sched/core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 8988d38..cd80b66 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7663,7 +7663,7 @@ const char *preempt_model_str(void)

if (IS_ENABLED(CONFIG_PREEMPT_DYNAMIC)) { seq_buf_printf(&s, "(%s)%s", - preempt_dynamic_mode > 0 ? + preempt_dynamic_mode >= 0 ? preempt_modes[preempt_dynamic_mode] : "undef", brace ? "}" : ""); return seq_buf_str(&s);