From nobody Sun Feb 8 13:32:29 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 108753C2F for ; Wed, 7 Jan 2026 06:16:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767766577; cv=none; b=m1g540TlD3+1+bVA8IIDb7S60t7pkLyxemO3k/ANaV2q/78ypDP8Z3qhvZwiuCKV513P76XJZuqlBWmXyYXFcz9+o/vwkSyZDmnCATr4S3AUCwIt+Ia3kmgYIOtAnl1/ROub5pROBWFzonsQhk06CApGHEydqlsivjvEEC+VRaU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1767766577; c=relaxed/simple; bh=DoM7rp2qhaj1jH6ROj9fRSlwwYTQQfeOTeRKh6qPgLs=; h=From:To:Cc:Subject:Date:Message-Id:MIME-Version; b=fKiD3XNQt2sghhgJfO2Q9Lyy6xKufXnHDzG+z/N8AWE08azaWwb5V1Airf5oEqWGTd/CgLUbZHlMsf5OsmfA7yanPcUT/jt7NdHXaMNQHawk7X3RtYwtiX+i87gNMc84zRZBiQB6vZ7OJzm6GK1EuwG7fHoEDKjlI7wq0y19kDY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 441C6497; Tue, 6 Jan 2026 22:16:06 -0800 (PST) Received: from ergosum.cambridge.arm.com (ergosum.cambridge.arm.com [10.1.196.45]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 04FD43F694; Tue, 6 Jan 2026 22:16:11 -0800 (PST) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org Cc: mark.rutland@arm.com, ryan.roberts@arm.com, Anshuman Khandual , Catalin Marinas , Will Deacon , linux-kernel@vger.kernel.org Subject: [PATCH] arm64/mm: Assert NR_BM_PUD_TABLES for bm_pud[] Date: Wed, 7 Jan 2026 06:16:06 +0000 Message-Id: <20260107061606.3160088-1-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.30.2 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" There is an implicit assumption about bm_pud[] being single entry PUD table just like bp_pmd[] which is a single entry PMD table. Though only the later gets asserted via NR_BM_PMD_TABLES. Hence let's add a similar check for PUD table as well. Cc: Catalin Marinas Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual --- arch/arm64/mm/fixmap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm64/mm/fixmap.c b/arch/arm64/mm/fixmap.c index c5c5425791da..e02594be8b8e 100644 --- a/arch/arm64/mm/fixmap.c +++ b/arch/arm64/mm/fixmap.c @@ -23,8 +23,11 @@ static_assert(FIXADDR_TOT_START > PCI_IO_END); SPAN_NR_ENTRIES(FIXADDR_TOT_START, FIXADDR_TOP, PMD_SHIFT) #define NR_BM_PMD_TABLES \ SPAN_NR_ENTRIES(FIXADDR_TOT_START, FIXADDR_TOP, PUD_SHIFT) +#define NR_BM_PUD_TABLES \ + SPAN_NR_ENTRIES(FIXADDR_TOT_START, FIXADDR_TOP, P4D_SHIFT) =20 static_assert(NR_BM_PMD_TABLES =3D=3D 1); +static_assert(NR_BM_PUD_TABLES =3D=3D 1); =20 #define __BM_TABLE_IDX(addr, shift) \ (((addr) >> (shift)) - (FIXADDR_TOT_START >> (shift))) --=20 2.30.2