From nobody Tue Apr 7 12:20:30 2026 Received: from mail-yw1-f172.google.com (mail-yw1-f172.google.com [209.85.128.172]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 886123CA4B2 for ; Fri, 3 Apr 2026 15:01:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775228484; cv=none; b=qqd81owmZOy/8n0hr03acR0Ah9W34aCKeQmVSpdUpwP24mEp7nLPf+GVU/NcbuuZGaYeWqCsl8xM3xIPaorS3Q4jtX1b3CXdyfbd8MsezyvgCyMIgBlQ3NtJouVliycRnFDMwLW1Jb3TbqJS1PZuZjhNbTMYjTJy0JvtuPgGVis= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1775228484; c=relaxed/simple; bh=DSNEvwLzzJWKMU1OwFgy5TbmQSivvfTMyXFg6lTPMkI=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=PcQ9BkFvKIexjbb/H7b6J4y4b5MdMnuxa2/R75g0FR0IVX2kvb1+dt2QereSZlVZk274htB3Dgj+Ya6DVXk+jCMe0IT89pxcbHfSKSGRI53KA4BWLoPRr8TmJu+TWkIrhfb38Lq1e0k0q4bDP2X1Yzt5XOLPHMEtbEo860VXWAs= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b=eNx0A0VB; arc=none smtp.client-ip=209.85.128.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="eNx0A0VB" Received: by mail-yw1-f172.google.com with SMTP id 00721157ae682-79a7109f568so21758777b3.1 for ; Fri, 03 Apr 2026 08:01:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20251104; t=1775228482; x=1775833282; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=rR6aY7VE3ISFMCxeDa2HPPgngT2koqSH+8RNS8lF9Pc=; b=eNx0A0VB1wCeUhLfUw0Bbi9Sjpe29/mYpbJgcch5wrkvgriPLmqG62mM+KBCspbZwl MAwKpQyJtwiFCtbMJr7fAT0fQNnL6PtCt/swehOq7RhX0L204tzLSGiPuvCgC+qNK6Tu hXLO6Db0Vd4RWSnndNB6wqnnLWvlIIqrrPizok2EH8k+nScMn8DZgjG1S0fguqIo2Msd teYJY/7WnzORyJEy5WbB1iIk3c6Me++3+f3RPt+WJ4h8Yiir9vqJOiEAzR4UC5e9SZFo gabhACPBGyiyNdjnO9vdgzuOssnRsP2QVzT4e9QjDyToh0pLjIPcXZpfXsQHm2vIYXYV 5lOg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1775228482; x=1775833282; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-gg:x-gm-message-state:from:to:cc:subject:date :message-id:reply-to; bh=rR6aY7VE3ISFMCxeDa2HPPgngT2koqSH+8RNS8lF9Pc=; b=Q0NXUVKajTbvFsag/sFmrlOpbViZTJGvTR7MkELoE7YrlwJ2V5+6LHxNSgu2yyyyz7 jwxyKuINgVs3vBPZoAkjxU8Rzgb+i96Cc6uvFcrrK6Uji/ghCHlPCUfkGjFj+tZeyiNf 3ncQ4thnqPffr03KjM0Ljj+mf4HNixInAmL5DBGLGi5ZhbuupphRU9ipPxP0KN2SCieq lMX9LEqGcHaEMc1maH1KYnuJgEqFx45pGaS1/GF4FMIQpCstWI9aPZD/vddIbvEFhJ7l piUfNigVOWnu6zur0GVVJSaHtOzRU4ySl4MS01EvLJRctHmsncXscUIBJ+v6pIZs2eYT Pphg== X-Forwarded-Encrypted: i=1; AJvYcCVvj7RWEQQrt7CnpNX+sScqY7UiwrvTftf7cF8jv36By0pjVRZRjmwzq8RsYBWadNRlWUwppdf2YjQcLlk=@vger.kernel.org X-Gm-Message-State: AOJu0Yx5oI5po68Sh8ywM1F47jk1pmbGuY/bVBBFcXUq8xqzCdLjFagQ i6wcdw16ogiPFpXsXpyK1Rpgd7EV5qZnId2B+DbRUpJa3tgSkzc7N6G+FJZsqg== X-Gm-Gg: AeBDieu2+V6Ypnv2LLgx43+iZbte9nRERcojewD9Okdbs90W1XI/AFiZYacRasji+xx fkSTRJBQoY3qUsoqg9F+6pGu8Et654f5qofUrxPQ7mLVcltNfXHQIETw1i3ZGVA6iEnJdGJCW/J 59m4ZRgFWKMeSuUDjQ6SKmSIKHxG5CT/HjE4ZxWuxMrvrs8+WjeYrVvfijNg6Twb485AJxYG0Ku y7vKW4oxMx4CROEUy1dht0a5q75G6usvnPkQ0pYaqNLLFoZUaOV5xiN2dYiBUMdJ5kGVSXUohqm t1Kc7m3tQuJRiZyYUJT4lH0wZV1dX6WCT7i7h5XlQ95VwKuFvbYgc/j/kNUlV5i76IPkpe9FE6M inhmR+LkbE8YB6djswe6usPUSm7Ouawg8EFRhCjF8VH5/W+2q1CgZ0YVEKpxjzFyAOkwp3RCX5i vZBZpynWpglitpLqM0C80= X-Received: by 2002:a05:690c:102:b0:79a:af2f:b722 with SMTP id 00721157ae682-7a4d6831751mr35583097b3.55.1775228482360; Fri, 03 Apr 2026 08:01:22 -0700 (PDT) Received: from localhost ([76.195.202.134]) by smtp.gmail.com with UTF8SMTPSA id 00721157ae682-7a36e830f12sm23519757b3.11.2026.04.03.08.01.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 03 Apr 2026 08:01:21 -0700 (PDT) From: Matt Turner To: Magnus Lindholm Cc: linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, Matt Turner Subject: [PATCH] alpha: Fix arch_irqs_disabled_flags() to handle intermediate IPL levels Date: Fri, 3 Apr 2026 11:01:19 -0400 Message-ID: <20260403150119.488427-1-mattst88@gmail.com> X-Mailer: git-send-email 2.52.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" arch_irqs_disabled_flags() only considered IRQs disabled when IPL was at IPL_MAX (7). However, PALcode enters interrupt handlers at intermediate IPL levels (e.g., IPL_DEV1=3D4, IPL_TIMER=3D5), which also have interrupts disabled at that level and below. This caused a lockdep warning when TRACE_IRQFLAGS_SUPPORT was enabled: lockdep_hardirqs_off() calls irqs_disabled() inside an interrupt handler and expects it to return true, but the intermediate IPL didn't match the IPL_MAX check. Fix by treating any IPL above IPL_MIN as interrupts disabled. Assisted-by: Claude:claude-opus-4-6 Signed-off-by: Matt Turner --- arch/alpha/include/asm/irqflags.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git ./arch/alpha/include/asm/irqflags.h ./arch/alpha/include/asm/irq= flags.h index 9f25d4e0d37e..80a01702b03a 100644 --- ./arch/alpha/include/asm/irqflags.h +++ ./arch/alpha/include/asm/irqflags.h @@ -57,7 +57,7 @@ static inline void arch_local_irq_restore(unsigned long f= lags) =20 static inline bool arch_irqs_disabled_flags(unsigned long flags) { - return flags =3D=3D IPL_MAX; + return (flags & 7) > IPL_MIN; } =20 static inline bool arch_irqs_disabled(void) --=20 2.52.0