linux-kernel - Re: [PATCH v2 4/4] riscv: dts: spacemit: k1: Add "b" ISA extension

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Message-ID: <20260115003929-GYA33650@gentoo.org>
Date: Thu, 15 Jan 2026 08:39:29 +0800
From: Yixun Lan <dlan@...too.org>
To: Guodong Xu <guodong@...cstar.com>
Cc: Jonathan Corbet <corbet@....net>, Paul Walmsley <pjw@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	Conor Dooley <conor.dooley@...rochip.com>,
	Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Chen Wang <unicorn_wang@...look.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Conor Dooley <conor+dt@...nel.org>,
	Junhui Liu <junhui.liu@...moral.tech>, linux-doc@...r.kernel.org,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	devicetree@...r.kernel.org, sophgo@...ts.linux.dev,
	spacemit@...ts.linux.dev
Subject: Re: [PATCH v2 4/4] riscv: dts: spacemit: k1: Add "b" ISA extension

Hi Guodong,

On 07:19 Thu 15 Jan     , Guodong Xu wrote:
> "b" is ratified (Apr/2024) much later than its components zba/zbb/zbs
> (Jun/2021). With "b" added into riscv/extensions.yaml, a dependency
> checking rule is now enforced, which requires that when zba, zbb, and zbs
> are all specified, "b" must be added as well. Failing to do this will
> cause dtbs_check schema check warnings.
> 
> According to uabi.rst, as a single-letter extension, "b" should be added
> after "c" in canonical order.
> 
> Update k1.dtsi to conform to this rule.
> 
> Signed-off-by: Guodong Xu <guodong@...cstar.com>

Reviewed-by: Yixun Lan <dlan@...too.org>

-- 
Yixun Lan (dlan)