linux-kernel - Re: [PATCH v2 07/13] dt-bindings: riscv: Add B ISA extension description

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Message-ID: <20251230-unselect-canon-842bc2403c47@spud>
Date: Tue, 30 Dec 2025 19:21:31 +0000
From: Conor Dooley <conor@...nel.org>
To: Alex Elder <elder@...cstar.com>
Cc: Guodong Xu <guodong@...cstar.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Paul Walmsley <pjw@...nel.org>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	Yixun Lan <dlan@...too.org>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Samuel Holland <samuel.holland@...ive.com>,
	Anup Patel <anup@...infault.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>, Lubomir Rintel <lkundrak@...sk>,
	Yangyu Chen <cyy@...self.name>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Heinrich Schuchardt <xypron.glpk@....de>,
	Kevin Meng Zhang <zhangmeng.kevin@...ux.spacemit.com>,
	Andrew Jones <ajones@...tanamicro.com>, devicetree@...r.kernel.org,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
	spacemit@...ts.linux.dev, linux-serial@...r.kernel.org
Subject: Re: [PATCH v2 07/13] dt-bindings: riscv: Add B ISA extension
 description

On Tue, Dec 30, 2025 at 12:06:39PM -0600, Alex Elder wrote:


> I think it's too bad these "equivalent" extensions can't be used
> to simplify things.
> 
> I really dislike requiring the both a simpler extension *and*
> the others that it represents/implies.

They generally have been done they way you'd expect, this one just
differs because b is being added much later on rather than at the same
time.

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