From nobody Mon Feb 9 06:59:24 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id DA85928151E; Tue, 3 Jun 2025 09:52:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748944346; cv=none; b=M+IxzA1suwUPHXKwh5KjOvLilnDC8EJhLGZBMenOSEpuDvpHsS6Kb/m6tyv1oJEz6Xw8aYQW6A8nnlBaUWcHcxOHE4GbRm7RbTIowG34vqnKXiB0Ke2g2CaziGOLiLtW/11M5WMLv7NrL8qLMrdxnABtV3VmGxhpXIGpyCvnp0g= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1748944346; c=relaxed/simple; bh=Xlxi9rPd9vD9mqlymmA7AuEXXEJbaZWZ9v07jx7GWOI=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=g4t1CkVjClpexpMmvBw46OQli1rw1ugrA07AbCMQrnolzq03ZaVjxMw4GhKuMoocvG9KYm+AWnyeTud3Y//l6aPEPIaTZ+TSvgKhJtaL1OhNqbFk71cluroC/VAItGoya6T90TCEmvFqwBcEFtZmtknT5ETNvTQuMly6drPj2M4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=LWeCr4rn; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=5QNFbJ6c; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="LWeCr4rn"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="5QNFbJ6c" From: =?utf-8?q?Thomas_Wei=C3=9Fschuh?= DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1748944337; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=rmYgAnk0V4lp/9zkefQtVct+J2O63fqxijSOg/js5bY=; b=LWeCr4rnQ8CKYH5Y3v54ZkDkEqGHqYbjpIgtgrAmV10YeqOmIFI3xH2inH60m/rinQGR+N kEBkA4sHSJH4fO1G8uK/xr5fk2H/hgAaq9A6YxWxuES0c6JmwA/o5Y6HgdNiz8LMpjyc1r vFMnwXl/svo1RYoRp7xQDYiGjpn7LvDP89HArd98pjhF3qSTD/PZy7g6N/OfEkfi3coV2V ytbHg8X7HYiYgBPF3N9g3Mh/hM1Xg/fG+hzxY1h5HYt/T5yGylUEnT5wZLqTcj78t2tslr 5eFQP7S6Irop0b3dbYFqbFqAyOjwcKbhhOWBHeBeqHkgGM+Hz8qIkz3aXZYytg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1748944337; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding; bh=rmYgAnk0V4lp/9zkefQtVct+J2O63fqxijSOg/js5bY=; b=5QNFbJ6cHzeTgRCctSafeiupEElh8yGKbOaviuWXQoz8s8lpjC+ahpqMcXgcCjVdBh19z9 WlXQyXm5apjgiyAQ== Date: Tue, 03 Jun 2025 11:52:13 +0200 Subject: [PATCH] sched: Fix preemption string of preempt_dynamic_none Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20250603-preempt-str-none-v1-1-f0e9916dcf44@linutronix.de> X-B4-Tracking: v=1; b=H4sIAMzFPmgC/x2MQQqAIBAAvxJ7bkFXiugr0SF0qz2kohGB+Pek4 8DMFMichDPMXYHEj2QJvoHuO7Dn5g9GcY2BFA1qVAZjYr7ijflO6INndKTJaGuJzAQta8Iu779 c1lo/F9Oz4WIAAAA= X-Change-ID: 20250603-preempt-str-none-d21231cc2238 To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Shrikanth Hegde , Sebastian Andrzej Siewior Cc: linux-kernel@vger.kernel.org, stable@vger.kernel.org, =?utf-8?q?Thomas_Wei=C3=9Fschuh?= X-Developer-Signature: v=1; a=ed25519-sha256; t=1748944334; l=1237; i=thomas.weissschuh@linutronix.de; s=20240209; h=from:subject:message-id; bh=Xlxi9rPd9vD9mqlymmA7AuEXXEJbaZWZ9v07jx7GWOI=; b=rU9NK325oLcYMqv3CYc1Zro/M5sdzjehER2RK3SaMV9Ymni4W3xTWHL0I7UCRw6dG7TOk9S6U k2ypHlC8c85DgoNM4lD1gTI1SQaHUuzRT1mDetLVm6MdioqZH+ztnGK X-Developer-Key: i=thomas.weissschuh@linutronix.de; a=ed25519; pk=pfvxvpFUDJV2h2nY0FidLUml22uGLSjByFbM6aqQQws= 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 preemptio= n string") Cc: stable@vger.kernel.org Signed-off-by: Thomas Wei=C3=9Fschuh Reviewed-by: Sebastian Andrzej Siewior Tested-by: Shrikanth Hegde --- 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..021b0a703d094b3386c5ba50e0e= 111e3a7c2b3df 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -7663,7 +7663,7 @@ const char *preempt_model_str(void) =20 if (IS_ENABLED(CONFIG_PREEMPT_DYNAMIC)) { seq_buf_printf(&s, "(%s)%s", - preempt_dynamic_mode > 0 ? + preempt_dynamic_mode >=3D 0 ? preempt_modes[preempt_dynamic_mode] : "undef", brace ? "}" : ""); return seq_buf_str(&s); --- base-commit: 546b1c9e93c2bb8cf5ed24e0be1c86bb089b3253 change-id: 20250603-preempt-str-none-d21231cc2238 Best regards, --=20 Thomas Wei=C3=9Fschuh