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Date: Fri, 18 Sep 2026 18:48:19 -0600 (MDT)
From: Paul Walmsley <pjw@kernel.org>
To: Troy Mitchell <troy.mitchell@linux.dev>
cc: Paul Walmsley <pjw@kernel.org>, Palmer Dabbelt <palmer@dabbelt.com>, 
    Albert Ou <aou@eecs.berkeley.edu>, Guo Ren <guoren@kernel.org>, 
    Andy Chiu <andybnac@gmail.com>, Vincent Chen <vincent.chen@sifive.com>, 
    =?ISO-8859-15?Q?Bj=F6rn_T=F6pel?= <bjorn@rivosinc.com>, 
    Alexandre Ghiti <alex@ghiti.fr>, linux-riscv@lists.infradead.org, 
    linux-kernel@vger.kernel.org, Palmer Dabbelt <palmer@rivosinc.com>, 
    Greentime Hu <greentime.hu@sifive.com>, Heiko Stuebner <heiko@sntech.de>, 
    Conor Dooley <conor.dooley@microchip.com>, 
    Kevin Zhang <zhangmeng.kevin@linux.spacemit.com>
Subject: Re: [PATCH] riscv: vector: Fix data pointer constraints in context
 save/restore
In-Reply-To: <20260908-riscv-vector-asm-fix-v1-1-147f314efb2b@linux.dev>
Message-ID: <a58873a8-5c05-696b-9b44-e1741eea24ad@kernel.org>
References: <20260908-riscv-vector-asm-fix-v1-1-147f314efb2b@linux.dev>
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On Tue, 8 Sep 2026, Troy Mitchell wrote:

> The standard vector save/restore asm advances datap but declares it as
> input-only. An inlined caller reusing the original pointer may therefore
> use the advanced address instead.
> 
> Declare datap as read-write so the compiler can preserve the original
> pointer when needed.
> 
> Fixes: 03c3fcd9941a ("riscv: Introduce struct/helpers to save/restore per-task Vector state")
> Signed-off-by: Troy Mitchell <troy.mitchell@linux.dev>

Thanks, queued for v7.3-rc.


- Paul