On 6/3/25 15:22, Thomas Weißschuh wrote:

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") Cc: stable@vger.kernel.org Signed-off-by: Thomas Weißschuh thomas.weissschuh@linutronix.de

---

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 dce50fa57471dffc4311b9d393ae300a43d38d20..021b0a703d094b3386c5ba50e0e111e3a7c2b3df 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);
  
  

Yes. It looks correct with patch: latency: 0 us, #1/1, CPU#0 | (M:PREEMPT(none) VP:0, KP:0, SP:0 HP:0 #P:80)

Tested-by: Shrikanth Hegde sshegde@linux.ibm.com